{"id":679,"date":"2020-11-28T07:14:21","date_gmt":"2020-11-27T23:14:21","guid":{"rendered":"https:\/\/byy3.com\/?p=679"},"modified":"2020-12-02T07:14:55","modified_gmt":"2020-12-01T23:14:55","slug":"mysql5-7%e6%80%a7%e8%83%bd%e6%8f%90%e5%8d%87%e4%b8%80%e7%99%be%e5%80%8d%e8%b0%83%e4%bc%98%e5%ae%9d%e5%85%b8","status":"publish","type":"post","link":"https:\/\/byy3.com\/?p=679","title":{"rendered":"mysql5.7\u6027\u80fd\u63d0\u5347\u4e00\u767e\u500d\u8c03\u4f18\u5b9d\u5178"},"content":{"rendered":"<div>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-691\" data-original=\"https:\/\/byy3.com\/wp-content\/uploads\/2020\/11\/2020120123120089.png\" src=\"https:\/\/byy3.com\/wp-content\/themes\/MNews%20V2.4\/images\/post-loading.gif\" width=\"170\" height=\"115\" title=\"mysql5.7\u6027\u80fd\u63d0\u5347\u4e00\u767e\u500d\u8c03\u4f18\u5b9d\u5178\u63d2\u56fe\" alt=\"mysql5.7\u6027\u80fd\u63d0\u5347\u4e00\u767e\u500d\u8c03\u4f18\u5b9d\u5178\u63d2\u56fe\" \/><\/p>\n<p><b>\u524d\u8a00\uff1a<\/b>\u5168\u6587\u4e2d\u4e00\u5171\u6709\u5e38\u7528\u7684\uff08\u4e8b\u5b9e\u4e0a\u4f60\u5982\u679c\u82b11-2\u5468\u9605\u8bfb\u3001\u7406\u89e3\u3001\u81ea\u5df1\u52a8\u624b\u8bbe\u4e00\u4e0b\u540e\u662f\u9700\u8981\u8fd9\u4e48\u591a\u53c2\u6570\u7684\uff0976\u4e2a\u53c2\u6570\uff0c\u7b14\u8005\u628a\u8fd110\u5e74\u91cc3\u4e2a\u4ebf\u4e07\u7ea7\u9879\u76ee\u7684\u6570\u636e\u5e93\u8c03\u4f18\u7528\u6b64\u7bc7\u6d53\u7f29\u5230\u4e86\u53ef\u80fd\u8bfb\u8005\u53ea\u9700\u89812\u5468\u65f6\u95f4\u5c31\u53ef\u4ee5\u638c\u63e1\uff0c\u540c\u65f6\u6211\u662f\u6309\u7167\uff1a<\/p>\n<ol>\n<li>\u6bcf\u4e00\u4e2a\u53c2\u6570\u5e72\u5417\uff1f<\/li>\n<li>\u5728\u67d0\u4e9b\u5178\u578b\u786c\u4ef6\u914d\u7f6e\u4e0b\u7684db\u4e0a\u53c2\u6570\u8be5\u8bbe\u591a\u5c11\uff1f<\/li>\n<li>\u8bbe\u4f1a\u600e\u4e48\u6837\uff1f<\/li>\n<li>\u4e0d\u8bbe\u4f1a\u600e\u4e48\u6837\uff1f<\/li>\n<li>\u6709\u4ec0\u4e48\u5751\u5982\u4f55\u586b\u5751\uff1f<\/li>\n<li>\u6709\u4e9b\u53c2\u6570\u600e\u4e48\u7b97\u3001\u7b97\u6cd5\u53c8\u5982\u4f55<\/li>\n<\/ol>\n<div>\n<p><a href=\"https:\/\/byy3.com\/go\/?url=http:\/\/byy3.com\" rel=\"nofollow\" ><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-692\" data-original=\"https:\/\/byy3.com\/wp-content\/uploads\/2020\/11\/2020120123142635.jpg\" src=\"https:\/\/byy3.com\/wp-content\/themes\/MNews%20V2.4\/images\/post-loading.gif\" width=\"985\" height=\"649\" title=\"mysql5.7\u6027\u80fd\u63d0\u5347\u4e00\u767e\u500d\u8c03\u4f18\u5b9d\u5178\u63d2\u56fe1\" alt=\"mysql5.7\u6027\u80fd\u63d0\u5347\u4e00\u767e\u500d\u8c03\u4f18\u5b9d\u5178\u63d2\u56fe1\" \/><\/a><\/p>\n<\/div>\n<p>\u8fd9\u79cdstyle\u6765\u5199\u7684\uff0c\u76f8\u4fe1\u6b64\u7bc7\u4f1a\u5bf9\u4e00\u4e9b\u4f7f\u7528mysql\u7684\u5c24\u5176\u662f\u6b63\u5728\u6216\u8005\u5c06\u8981\u9762\u4e34\u4e07\u7ea7\u5e76\u53d1\u7684\u9879\u76ee\u3001\u7f51\u7ad9\u6709\u6240\u5e2e\u52a9\u3002\u5177\u4f53\u8bf7\u770b\u6587\u6863\uff01<\/p>\n<p>\u4e00\u5343\u4e2aDBA\u5c31\u6709\u4e00\u5343\u79cd\u914d\u7f6e\u65b9\u5f0f!<\/p>\n<p>\u5927\u5bb6\u4e00\u5b9a\u8bb0\u5f97\u4e0d\u8981\u8f7b\u6613\u53bb\u770b\u7f51\u4e0a\uff0c\u8981\u770b\u53ea\u770b\u5b98\u7f51\uff01\u7f51\u4e0a\u5f88\u591a\u535a\u5ba2\u90fd\u662f\u9519\u7684\uff0c\u8fde\u53c2\u6570\u90fd\u5217\u9519\u4e86\uff0c5.7\u5f88\u591a\u53c2\u6570\u548c5.6\u662f\u5b8c\u5168\u4e0d\u4e00\u6837\u7684\u3002<\/p>\n<p>\u53ef\u80fd\u4f60\u4ece\u672a\u770b\u5230\u8fc7\u8fd9\u6837\u7684\u4e00\u7bc7\u96c6\u4e2d\u706b\u529b\u5f0f\u7684\u628amysql\u53c2\u6570\u5217\u4e86\u8fd9\u4e48\u5168\u7684\u6587\u7ae0\uff0c\u5f88\u6709\u5174\u66fe\u53c2\u4e0e\u8fc7\u8d853\u4e07\u5e76\u53d1\u768418\uff5e19\u5e74\u7684\u6570\u8f6e520\u3001618\u3001\u53cc11\u3001\u53cc12\u4fdd\u536b\u6218\u3002\u56e0\u6b64\u8fd9\u4e00\u7bc7\u662f\u6c47\u96c6\u4e86\u6700\u7cbe\u534e\u548c\u5b9e\u6218\u7684\u5185\u5bb9\u628amysql\u6240\u6709\u7684\u53c2\u6570\u5217\u5728\u8fd9\u8fb9\u4f9b\u5927\u5bb6\u53c2\u8003\u3002\u5e76\u4e14\u4ee5\uff0864c cpu\uff0c128gb\u5185\u5b58\uff09\u7684mysql cpu\u548c\u5185\u5b58\u6765\u8fdb\u884c\u4e86\u4e00\u8f6e\u914d\u7f6e\u3002\u800c\u6b64\u6587\u7684\u5185\u5b58\u76f8\u5173\u53c2\u6570\u90e8\u5206\u53ef\u4ee5\u5ef6\u5c55\u81f3256gb\uff5e512gb\u3002<\/p>\n<p>\u53e6\u5916\u6709\u4e00\u70b9\uff0c<b>\u5efa\u8bae\u5728mysql\u7684\u670d\u52a1\u5668\u4e0a\u4f7f\u7528ssd<\/b>\u3002\u9664\u975e\u5e76\u53d1\u6570\u6c38\u8fdc\u63a7\u5236\u5728500-1000\u5185\u90a3\u5c31\u6ca1\u5fc5\u8981\u4f7f\u7528ssd\uff0c\u666e\u901a\u9ad8\u901f\u78c1\u76d8\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n<p>\u4f60\u4f1a\u53d1\u89c9\u8fd9\u7bc7\u6587\u7ae0\u662f\u4e00\u7bc7\u5b9d\u85cf\uff0c\u8fd9\u4e9b\u53c2\u6570\u90fd\u80fd\u591f\u81ea\u5df1\u52a8\u624b\u8bd5\u9a8c\u4e00\u7bc7\u57fa\u672c\u5728\u5916\u9762\u662f\u53ef\u4ee5\u540a\u6253mysql\u9762\u8bd5\u5b98\u4e86\u3002<\/p>\n<h1 data-id=\"heading-0\">client\u57df\uff1a<\/h1>\n<p><b>1.character_set_client<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>utf8mb4<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<blockquote><p>\u5b57\u7b26\u96c6\u8bbe\u5b9a\uff0c\u5982\u679c\u524d\u53f0\u6709\u8fdesocial mobile application\u4e00\u7c7b\u5305\u62ecwechat\uff0c\u5e76\u4e14\u5141\u8bb8\u6709\u4f7f\u7528emoji\u8868\u60c5\u7684\uff0c\u8bf7\u5f00\u542f\u6210utf8mb4<\/p><\/blockquote>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>mysql\u4e0d\u652f\u6301\u524d\u7aefapp\u5b58\u8868\u60c5\u7b49\u5b57\u7b26<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>character_set_client=utf8mb4<\/p>\n<p>mysqld\u57df\uff1a<\/p><\/blockquote>\n<p><b>1)server-id<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>\u5982\u679c\u6ca1\u6709\u505a\u4efb\u4f55\u4e3b\u4ece\u590d\u5236\uff0c\u6b64\u503c\u53ef\u4ee5\u4e0d\u8bbe\u3002<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<blockquote><p>\u9047\u6709\u4e3b\u4ece\u590d\u5236\uff0c\u5fc5\u8bbe\u8be5\u503c\uff0c\u6bcf\u4e2a\u53c2\u4e0e\u4e3b\u4ece\u590d\u5236\u7684mysql\u5b9e\u4f8b\u7684server-id\u4e0d\u80fd\u91cd\u590d\uff0c\u5fc5\u987b\u4e3a\u963f\u62c9\u4f2f\u6570\u5b57\u3002<\/p><\/blockquote>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u5982\u679c\u4f60\u7528\u7684\u662f\u4e3b\u4ece\u590d\u5236\uff0c\u8fd9\u4e2aid\u4e0d\u8bbe\u90a3\u4e48\u6574\u4e2amysql\u7684\u4e3b\u4ece\u590d\u5236\u4f1a\u5931\u51e0\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>server-id=1<\/p><\/blockquote>\n<p><b>2)port<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>3306<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<blockquote><p>mysql\u5b9e\u4f8b\u7aef\u53e3<\/p><\/blockquote>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u4e3a3306<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>port=3306<\/p><\/blockquote>\n<p><b>3)bind_address<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>0.0.0.0<\/p><\/blockquote>\n<p><b>\u4f5c\u7528\uff1a<\/b><\/p>\n<blockquote><p>\u9664\u975e\u6709\u7279\u6b8a\u9700\u8981\uff0c\u6211\u4eec\u4f1a\u9650\u5236\u53ea\u5141\u8bb8mysql\u5b9e\u4f8b\u88ab\u67d0\u4e00\u4e2aip\u65b9\u95ee\uff0c\u4e0d\u652f\u6301\u591a\u4e2a\uff0c\u751f\u4ea7\u4e0a\u90fd\u4e3a\uff1a0.0.0.0\u7136\u540e\u4f7f\u7528\u9632\u706b\u5899\u7b56\u7565\u6765\u63a7\u5236\u3002<\/p><\/blockquote>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u4e0d\u5141\u8bb8\u8fdc\u7a0b\u767b\u5f55<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>bind_address=0.0.0.0<\/p><\/blockquote>\n<p><b>4)autocommit<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>1<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<blockquote><p>\u751f\u4ea7\u4e0a\u5f00\u542f\u62101\uff0c\u5982\u679c\u4f60\u5f00\u542f\u7684\u662f0\u4f1a\u6709\u4e00\u4e2a\u8fd9\u6837\u7684\u60c5\u51b5\uff1a<\/p>\n<p>a\u8fd0\u884c\u4e00\u6761insert\u8bed\u53e5\uff0c\u5e76\u672a\u4f5ccommit;b\u53bb\u505a\u67e5\u8be2\u6b64\u65f6b\u662f\u67e5\u8be2\u4e0d\u5230\u7684\u3002\u8fd9\u79cd\u64cd\u4f5c\u4e00\u822c\u7528\u4e8e\u5728\u5199store procedure\u65f6\u7528\u5230\u3002<\/p><\/blockquote>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u5982\u679c\u5728\u7cfb\u7edf\u7684my.cnf\u5c42\u9762\u628a\u5b83\u8bbe\u6210\u4e860\uff0c\u5982\u679c\u5728\u4f7f\u7528\u65f6\uff0899%\u60c5\u51b5\u662f\u7528\u76841\uff09\u65f6\uff0c\u4f60\u60f3\u8981\u7528root\u5728\u751f\u4ea7\u8fd0\u884c\u65f6\u628a\u5b83\u8bbe\u6210set autocommit = 1\u90fd\u5f00\u542f\u4e0d\u4e86\u3002\u800c\u5982\u679c\u4f60\u5728\u4e00\u5f00\u59cb\u5c31\u6ca1\u5b83\u8bbe\u7f6e\u62101\uff0c\u90a3\u4e48\u5f53\u78b0\u5230\u67d0\u4e9b\u7279\u6b8a\u573a\u666f\u7279\u522b\u662f\u5199store procedure\u65f6\u9700\u8981\u628a\u5b83\u8bbe\u62100\u65f6\uff0c\u4f60\u662f\u53ef\u4ee5\u624b\u52a8\u4e34\u65f6\u628a\u67d0\u4e00\u4e2asession\u7ed9\u5f00\u57280\u7684\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>autocommit = 1<\/p><\/blockquote>\n<p><b>5)character_set_server<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>utf8mb4<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<blockquote><p>\u5b57\u7b26\u96c6\u8bbe\u5b9a\uff0c\u5982\u679c\u524d\u53f0\u6709\u8fdesocial mobile application\u4e00\u7c7b\u5305\u62ecwechat\uff0c\u5e76\u4e14\u5141\u8bb8\u6709\u4f7f\u7528emoji\u8868\u60c5\u7684\uff0c\u8bf7\u5f00\u542f\u6210utf8mb4<\/p><\/blockquote>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>mysql\u4e0d\u652f\u6301\u524d\u7aefapp\u5b58\u8868\u60c5\u7b49\u5b57\u7b26<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>character_set_server=utf8mb4<\/p><\/blockquote>\n<p><b>6)skip_name_resolve<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>1<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<blockquote><p>\u751f\u4ea7\u4e0a\u5efa\u8bae\u5f00\u542f\u62101\uff0c\u8fd9\u6837mysql server\u4e0d\u4f1a\u5bf9\u5ba2\u6237\u7aef\u8fde\u63a5\u4f7f\u7528\u53cd\u5411dns\u89e3\u6790\uff0c\u5426\u5219\u5ba2\u6237\u7aef\u8fde\u4e0a\u540e\u6709\u65f6\u5728\u9047\u6709\u751f\u4ea7\u9ad8\u901f\u8fd0\u884c\u65f6\u76f4\u63a5timeout\uff0c\u5982\u679c\u8bbe\u6210\u4e861\u5e26\u6765\u7684\u95ee\u9898\u5c31\u662f\u4f60\u4e0d\u80fd\u5728mysql\u4e2d\u4f7f\u7528\u4e3b\u673a\u540d\u6765\u5bf9\u5ba2\u6237\u7aef\u6743\u9650\u8fdb\u884c\u5212\u5206\uff0c\u800c\u662f\u9700\u8981\u4f7f\u7528ip\u3002<\/p>\n<p>\u5982\u679c\u8981\u505a\u6210\u5373\u5141\u8bb8mysql\u91cc\u5141\u8bb8\u4f7f\u7528\u4e3b\u673a\u540d\u6765\u5206\u914d\u5ba2\u6237\u7aef\u8fde\u63a5\u6743\u9650\uff0c\u53c8\u8981\u505a\u5230\u4e0d\u8981\u8ba9mysql\u53bb\u505adns\u89e3\u6790\uff0c\u53ef\u4ee5\u5728mysql\u6240\u5728\u4e3b\u673a\u7aef\u7684\/etc\/hosts\u6587\u4ef6\u4e2d\u5199\u4e0a\u5ba2\u6237\u7aef\u7684\u4e3b\u673a\u540d\uff0c\u56e0\u4e3a\u5f53\u5ba2\u6237\u7aef\u8fde\u63a5\u8fde\u4e0a\u6765\u65f6\uff0cmysql\u53cd\u5411\u67e5\u627e\u5ba2\u6237\u7aef\u8fde\u63a5\u65f6\u7684\u57df\u540d\u89e3\u6790\u7684\u6b65\u9aa4\u662f\uff1a\u9996\u5148\u67e5\u627e \/etc\/hosts \u6587\u4ef6\uff0c\u641c\u7d22\u57df\u540d\u548cIP\u7684\u5bf9\u5e94\u5173\u7cfb\u3002\u4f46\u662f\u8fd9\u6837\u505a\u4e5f\u6709\u4e00\u4e2a\u95ee\u9898\uff0c\u90a3\u5c31\u662f\u5982\u679c\u4f60\u6709\u591a\u4e2a\u5ba2\u6237\u7aef\u591a\u4e2amysql\u4e3b\u4ece\u5173\u7cfb\uff0c\u54ea\u5230\u4f60\u8981\u628amysql\u505a\u6210\u4e00\u4e2adns\u89e3\u6790\u5668\u5417\uff1f\u56e0\u6b64\u63a8\u8350\u8bbe\u62101<\/p><\/blockquote>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>mysql server\u6bcf\u4e00\u6b21\u4f1a\u5bf9\u5ba2\u6237\u7aef\u8fde\u63a5\u4f7f\u7528\u53cd\u5411dns\u89e3\u6790\uff0c\u7ecf\u5e38\u4f1a\u51fa\u73b0\u5ba2\u6237\u7aef\u8fde\u4e0a\u540e\u6709timeout\u73b0\u8c61\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>skip_name_resolve=1<\/p><\/blockquote>\n<p><b>7)max_connections<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>20,000<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u6700\u5927\u8fde\u63a5\u6570\uff0c\u4ee5\u5fae\u54c1\u4f1a\uff1a\u524d\u7aef3\u4e07\u7684tps\u5e76\u53d1\uff0c\u5047\u8bberedis\u547d\u4e2d\u5931\u654850%\uff08\u8fd9\u662f\u707e\u96be\uff09\uff0c\u90a3\u4e48\u540e\u7aefmysql\u5355\u4e2a\u4e3b\u6216\u4ece\u5f00\u542f\u8fde\u63a5\u6570\u4e3a\uff1a20,000\uff0c\u6211\u4eec\u516c\u53f8\u5728\u524d\u7aef\u5e76\u53d1\u66fe\u8fbe\u5230\u8fc76\u4e07\uff0c80%\u88abwaf\u3001vanish\u3001\u7f13\u5b58\u6321\u6389\uff0c\u843d\u5728db\u4e0a\u7684qps\u6700\u9ad8\u4e00\u6b21\u4e3a20,000\u8fde\u63a5\uff0c\u518d\u6309\u7167mysql\u5b98\u65b9\uff0cmax_connections\u503c\u53d7\u7cfb\u7edfos\u6700\u5927\u6253\u5f00\u8fde\u63a5\u6570\u9650\u5236\uff0c\u56e0\u6b64\u6211\u4eec\u9700\u8981\u505a\u4ee5\u4e0b2\u6b65\u64cd\u4f5c\uff1a<\/p>\n<p>1\uff09\u5728 \/etc\/security\/limits.conf \u5e95\u90e8\u589e\u52a02\u884c<\/p>\n<pre class=\"hljs bash\"><code class=\"hljs bash copyable\" lang=\"bash\">mysql hard nofile 65535mysql soft nofile 65535<span class=\"copy-code-btn\">\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n<p>2\uff09\u5728\/usr\/lib\/systemd\/system\/mysqld.service\uff08\u89c6\u5982\u4f55\u5b89\u88c5mysql\u6240\u51b3\u5b9a\uff0c\u7528\u7f16\u8bd1\u5b89\u88c5\u548cyum\u5b89\u88c5\u4f1a\u4ea7\u751fpath\u8def\u5f84\u4e0d\u540c\u3002\uff09\u6587\u4ef6\u6700\u540e\u6dfb\u52a0\uff1a<\/p>\n<pre class=\"hljs bash\"><code class=\"hljs bash copyable\" lang=\"bash\">LimitNOFILE=65535LimitNPROC=65535$ systemctl daemon-reload$ systemctl restart mysqld.service<span class=\"copy-code-btn\">\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n<p>\u5982\u4e0d\u751f\u6548\u91cd\u670d\u52a1\u5668\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u53ea\u6709150<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>max_connections = 20,000<\/p><\/blockquote>\n<p><b>8)max_connect_errors<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>\u751f\u4ea7\u4e0a\u8bbe10<\/p>\n<p>\u5f00\u53d1\u6d4b\u8bd5\u4e0a\u4f7f\u7528\u9ed8\u8ba4-100<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u751f\u4ea7\u4e0a\u5f00\u542f\u621010\u6b21\uff0c\u5f00\u53d1\u6d4b\u8bd5\u4e0a\u4f7f\u7528\u9ed8\u8ba4\u5373\u4e0d\u8bbe\u3002<\/p>\n<p>max_connect_errors\u662f\u4e00\u4e2aMySQL\u4e2d\u4e0e\u5b89\u5168\u6709\u5173\u7684\u8ba1\u6570\u5668\u503c\uff0c\u5b83\u8d1f\u8d23\u963b\u6b62\u8fc7\u591a\u5c1d\u8bd5\u5931\u8d25\u7684\u5ba2\u6237\u7aef\u4ee5\u9632\u6b62\u66b4\u529b\u7834\u89e3\u5bc6\u7801\u7684\u60c5\u51b5\u3002\u5982\u679c\u9700\u8981\u8bbe\u7f6e\u6b64\u6570\u503c\uff0c\u624b\u52a8\u6dfb\u52a0\u3002\u5f53\u6b64\u503c\u8bbe\u7f6e\u4e3a10\u65f6\uff0c\u610f\u5473\u7740\u5982\u679c\u67d0\u4e00\u5ba2\u6237\u7aef\u5c1d\u8bd5\u8fde\u63a5\u6b64MySQL\u670d\u52a1\u5668\uff0c\u4f46\u662f\u5931\u8d25\uff08\u5982\u5bc6\u7801\u9519\u8bef\u7b49\u7b49\uff0910\u6b21\uff0c\u5219MySQL\u4f1a\u65e0\u6761\u4ef6\u5f3a\u5236\u963b\u6b62\u6b64\u5ba2\u6237\u7aef\u8fde\u63a5\u3002\u76f8\u5173\u7684\u767b\u5f55\u9519\u8bef\u4fe1\u606f\u4f1a\u8bb0\u5f55\u5230performance_schema.host_cache\u8868\u4e2d\u3002\u5982\u679c\u5e0c\u671b\u91cd\u7f6e\u6b64\u8ba1\u6570\u5668\u7684\u503c\uff0c\u5219\u5fc5\u987b\u91cd\u542fMySQL\u670d\u52a1\u5668\u6216\u8005\u6267\u884c<\/p>\n<h1 data-id=\"heading-1\">Mysql&gt; FLUSH HOSTS;<\/h1>\n<p><b>1 Mysql&gt; FLUSH HOSTS;<\/b><\/p>\n<p>\u5f53\u8fd9\u4e00\u5ba2\u6237\u7aef\u6210\u529f\u8fde\u63a5\u4e00\u6b21MySQL\u670d\u52a1\u5668\u540e\uff0c\u9488\u5bf9\u6b64\u5ba2\u6237\u7aef\u7684max_connect_errors\u4f1a\u6e05\u96f6\u3002\u53ef\u4ee5\u5728\u9632\u706b\u5899\u4e0a\u505a\u7b56\u7565\u9650\u5236\u67d0\u4e9bip\u7684\u8fdc\u7a0b\u8fde\u63a5\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u4e3a100<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>max_connect_errors =10<\/p><\/blockquote>\n<p><b>9)innodb_flush_log_at_trx_commit<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>2<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>(\u6838\u5fc3\u4ea4\u6613\u7cfb\u7edf\u8bbe\u7f6e\u4e3a1\uff0c\u9ed8\u8ba4\u4e3a1\uff0c\u5176\u4ed62\u6216\u80050)\uff0c<\/p>\n<p>0\u4ee3\u8868\uff1alog buffer\u5c06\u6bcf\u79d2\u4e00\u6b21\u5730\u5199\u5165log file\u4e2d\uff0c\u5e76\u4e14log file\u7684flush(\u5237\u5230\u78c1\u76d8)\u64cd\u4f5c\u540c\u65f6\u8fdb\u884c\u3002\u8be5\u6a21\u5f0f\u4e0b\u5728\u4e8b\u52a1\u63d0\u4ea4\u7684\u65f6\u5019\uff0c\u4e0d\u4f1a\u4e3b\u52a8\u89e6\u53d1\u5199\u5165\u78c1\u76d8\u7684\u64cd\u4f5c\u3002<\/p>\n<p>1\u4ee3\u8868\uff1a\u6bcf\u6b21\u4e8b\u52a1\u63d0\u4ea4\u65f6MySQL\u90fd\u4f1a\u628alog buffer\u7684\u6570\u636e\u5199\u5165log file\uff0c\u5e76\u4e14flush(\u5237\u5230\u78c1\u76d8)\u4e2d\u53bb\uff0c\u8be5\u6a21\u5f0f\u4e3a\u7cfb\u7edf\u9ed8\u8ba4\uff08\u56e0\u6b64\u4f1a\u4fdd\u7559\u6bcf\u4e00\u4efdredo\u65e5\u5fd7\uff09<\/p>\n<p>2\u4ee3\u8868\uff1a\u6bcf\u6b21\u4e8b\u52a1\u63d0\u4ea4\u65f6MySQL\u90fd\u4f1a\u628alog buffer\u7684\u6570\u636e\u5199\u5165log file\uff0c\u4f46\u662fflush(\u5237\u5230\u78c1\u76d8)\u64cd\u4f5c\u5e76\u4e0d\u4f1a\u540c\u65f6\u8fdb\u884c\u3002\u8be5\u6a21\u5f0f\u4e0b\uff0cMySQL\u4f1a\u6bcf\u79d2\u6267\u884c\u4e00\u6b21 flush(\u5237\u5230\u78c1\u76d8)\u64cd\u4f5c\u3002\u8be5\u6a21\u5f0f\u901f\u5ea6\u8f83\u5feb\uff0c\u4e5f\u6bd40\u5b89\u5168\uff0c\u53ea\u6709\u5728\u64cd\u4f5c\u7cfb\u7edf\u5d29\u6e83\u6216\u8005\u7cfb\u7edf\u65ad\u7535\u7684\u60c5\u51b5\u4e0b\uff0c\u4e0a\u4e00\u79d2\u949f\u6240\u6709\u4e8b\u52a1\u6570\u636e\u624d\u53ef\u80fd\u4e22\u5931\u3002<\/p>\n<p>\u9664\u975e\u4f60\u7528\u7684\u662f\u5c0f\u578b\u673a\u6216\u8005\u662f\u8d85\u5927\u89c4\u6a21mysql\u96c6\u7fa4\u4e00\u7c7b\u5982\uff1a\u6e38\u620f\u884c\u4e1a\uff0c\u90a3\u4e48\u9700\u8981\u4fdd\u7559\u6bcf\u4e00\u79d2\u7684\u4e8b\u52a1\uff0c\u5426\u5219\u8bf7\u8bbe\u62102\uff0c\u8981\u4e0d\u7136\u4f1a\u4e25\u91cd\u5f71\u54cd\u7cfb\u7edf\u6027\u80fd\u3002\u8fd9\u4e2a\u53c2\u6570\u662f5.6\u6240\u6ca1\u6709\u7684\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u4e3a1\uff0c\u5f71\u54cd\u7cfb\u7edf\u5199\u6027\u80fd\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_flush_log_at_trx_commit=2<\/p><\/blockquote>\n<p><b>10)transaction_isolation<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>READ-COMMITTED<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<ol>\n<li>\u6b64\u53c2\u6570\u76f4\u63a5\u51b3\u5b9a\u4e86mysql\u7684\u6027\u80fd\uff0coracle\u4e2d\u7684\u4e8b\u52a1\u9ed8\u8ba4\u7ea7\u522b\u5c31\u662fread-commited\uff0c\u800cmysql\u7684\u9ed8\u8ba4\u7ea7\u522b\u662f:repeatable-read\uff0c\u5b83\u5229\u7528\u81ea\u8eab\u72ec\u6709\u7684Gap Lock\u89e3\u51b3\u4e86\"\u5e7b\u8bfb\"\u3002\u4f46\u4e5f\u56e0\u4e3aGap Lock\u7684\u7f18\u6545\uff0c\u76f8\u6bd4\u4e8eREAD-COMMITTED\u7ea7\u522b\u7684Record Lock\uff0cREPEATABLE-READ\u7684\u4e8b\u52a1\u5e76\u53d1\u63d2\u5165\u6027\u80fd\u53d7\u5230\u5f88\u5927\u7684\u9650\u5236\u3002\u79bb\u7ea7\u522b\u7684\u9009\u62e9\u53d6\u51b3\u4e8e\u5b9e\u9645\u7684\u4e1a\u52a1\u9700\u6c42\uff08\u5b89\u5168\u4e0e\u6027\u80fd\u7684\u6743\u8861\uff09\uff0c\u5982\u679c\u4e0d\u662f\u91d1\u878d\u3001\u7535\u4fe1\u7b49\u4e8b\u52a1\u7ea7\u522b\u8981\u6c42\u5f88\u9ad8\u7684\u4e1a\u52a1\uff0c\u5b8c\u5168\u53ef\u4ee5\u8bbe\u7f6e\u6210transaction_isolation=READ-COMMITTED\u3002<\/li>\n<li>Repeatable-read: \u8fd9\u662fMySQL\u7684InnoDB\u5f15\u64ce\u9ed8\u8ba4\u7684\u9694\u79bb\u7ea7\u522b\uff0c\u5b83\u963b\u6b62\u67e5\u8be2\u7684\u4efb\u4f55\u884c\u88ab\u5176\u4ed6\u4e8b\u52a1\u66f4\u6539\u3002\u56e0\u6b64\uff0c\u963b\u585e\u4e0d\u53ef\u91cd\u590d\u8bfb\uff0c\u800c\u4e0d\u662f\u5e7b\u8bfb\u3002\u4e5f\u5c31\u662f\u8bf4\u5728\u53ef\u91cd\u590d\u8bfb\u4e2d\uff0c\u53ef\u80fd\u4f1a\u51fa\u73b0\u5e7b\u8bfb\u3002\u91cd\u590d\u8bfb\u4f7f\u7528\u4e00\u79cd\u4e2d\u7b49\u4e25\u683c\u7684\u9501\u5b9a\u7b56\u7565\uff0c\u4ee5\u4fbf\u4e8b\u52a1\u4e2d\u7684\u6240\u6709\u67e5\u8be2\u90fd\u80fd\u770b\u5230\u6765\u81ea\u76f8\u540c\u5feb\u7167(\u5373\u4e8b\u52a1\u542f\u52a8\u65f6\u7684\u6570\u636e)\u7684\u6570\u636e\u3002\u5f53\u62e5\u6709\u8be5\u7ea7\u522b\u7684\u4e8b\u52a1\u6267\u884c UPDATE ... WHERE, DELETE ... WHERE, SELECT ... FOR UPDATE\u548cLOCK IN SHARE MODE\u64cd\u4f5c\u65f6\uff0c\u5176\u4ed6\u4e8b\u52a1\u53ef\u80fd\u9700\u8981\u7b49\u5f85\u3002<\/li>\n<li>Read-Committed-\u63a8\u8350: \u4e8b\u52a1\u65e0\u6cd5\u770b\u5230\u6765\u81ea\u5176\u4ed6\u4e8b\u52a1\u7684\u672a\u63d0\u4ea4\u6570\u636e\uff0c\u4f46\u53ef\u4ee5\u770b\u5230\u5f53\u524d\u4e8b\u52a1\u542f\u52a8\u540e\u53e6\u4e00\u4e2a\u4e8b\u52a1\u63d0\u4ea4\u7684\u6570\u636e\u3002\u5f53\u62e5\u6709\u8fd9\u79cd\u7ea7\u522b\u7684\u4e8b\u52a1\u6267\u884c UPDATE ... WHERE or DELETE ... WHERE\u64cd\u4f5c\u65f6\uff0c\u5176\u4ed6\u4e8b\u52a1\u53ef\u80fd\u9700\u8981\u7b49\u5f85\u3002\u4f46\u662f\u8be5\u4e8b\u52a1\u53ef\u4ee5\u6267\u884c SELECT ... FOR UPDATE, and LOCK IN SHARE MODE\u64cd\u4f5c\uff0c\u5176\u4ed6\u4e8b\u52a1\u4e0d\u9700\u8981\u7b49\u5f85\u3002<\/li>\n<li>\u4e32\u884c\u5316\uff08SERIALIZABLE\uff09-\u6781\u529b\u4e0d\u63a8\u8350\uff0c\u4e32\u884c\u5316\u9694\u79bb\u7ea7\u522b\u662f\u6700\u9ad8\u7684\u9694\u79bb\u7ea7\u522b\uff0c\u5b83\u4f7f\u7528\u4e86\u6700\u4fdd\u5b88\u7684\u9501\u7b56\u7565\u3002\u5b83\u963b\u6b62\u4efb\u4f55\u5176\u4ed6\u4e8b\u52a1\u63d2\u5165\u6216\u66f4\u6539\u6b64\u4e8b\u52a1\u8bfb\u53d6\u7684\u6570\u636e\uff0c\u76f4\u5230\u8be5\u4e8b\u52a1\u5b8c\u6210\u3002\u7b80\u5355\u7684\u6765\u8bf4\uff0c\u5c31\u662f\u4e00\u4e2a\u4e8b\u52a1\u4e00\u4e2a\u4e8b\u52a1\u7684\u6765\u6267\u884c\uff0c\u663e\u7136\u6027\u80fd\u4f1a\u5f88\u4f4e\u3002\u5728\u8fd9\u79cd\u9694\u79bb\u7ea7\u522b\u4e0b\uff0c\u4e00\u4e2a\u4e8b\u52a1\u4e2d\u7684\u76f8\u540c\u67e5\u8be2\u53ef\u4ee5\u53cd\u590d\u6267\u884c\uff0c\u6bcf\u6b21\u67e5\u8be2\u7ed3\u679c\u662f\u4e00\u6837\u7684\u3002\u4ece\u5f53\u524d\u4e8b\u52a1\u5f00\u59cb\u6267\u884c\uff0c\u4efb\u4f55\u66f4\u6539\u53e6\u4e00\u4e2a\u4e8b\u52a1\u63d0\u4ea4\u7684\u6570\u636e\u7684\u5c1d\u8bd5\u90fd\u4f1a\u5bfc\u81f4\u5f53\u524d\u4e8b\u52a1\u7b49\u5f85\uff08\u963b\u585e\uff09\u3002\u8fd9\u662fSQL\u6807\u51c6\u6307\u5b9a\u7684\u9ed8\u8ba4\u9694\u79bb\u7ea7\u522b\uff08\u6ce8\u610f\u4e0d\u662fMySQL\uff09\u3002\u5728\u5b9e\u8df5\u4e2d\uff0c\u8fd9\u79cd\u4e25\u683c\u7a0b\u5ea6\u662f\u5f88\u5c11\u9700\u8981\u7684\u3002<\/li>\n<li>\u8bfb\u672a\u63d0\u4ea4\uff08READ-UNCOMMITTED\uff09-\u5b83\u662f\u6700\u4f4e\u7684\u9694\u79bb\u7ea7\u522b\uff0c\u867d\u7136\u6027\u80fd\u6700\u9ad8\uff0c\u4f46\u4e5f\u4e0d\u63a8\u8350<\/li>\n<li>\u5b83\u4f1a\u8bfb\u53d6\u5230\u5176\u4ed6\u4e8b\u52a1\u4fee\u6539\u5c1a\u672a\u63d0\u4ea4\u7684\u6570\u636e\uff0c\u4f7f\u7528\u6b64\u9694\u79bb\u7ea7\u522b\u5c31\u9700\u8981\u975e\u5e38\u5c0f\u5fc3\uff0c\u8ba4\u8bc6\u5230\u8fd9\u79cd\u7ea7\u522b\u4e0b\u7684\u67e5\u8be2\u7ed3\u679c\u53ef\u80fd\u4e0d\u4e00\u81f4\u6216\u4e0d\u53ef\u590d\u5236\uff0c\u8fd9\u53d6\u51b3\u4e8e\u5176\u4ed6\u4e8b\u52a1\u540c\u65f6\u5728\u505a\u4ec0\u4e48\u3002\u901a\u5e38\uff0c\u5177\u6709\u6b64\u9694\u79bb\u7ea7\u522b\u7684\u4e8b\u52a1\u53ea\u6267\u884c\u67e5\u8be2\uff0c\u800c\u4e0d\u6267\u884c\u63d2\u5165\u3001\u66f4\u65b0\u6216\u5220\u9664\u64cd\u4f5c\u3002<\/li>\n<li>\u5728\u5b9e\u9645\u73af\u5883\u4e2d\uff0c\u5e94\u5f53\u6839\u636e\u662f\u5426\u5141\u8bb8\u51fa\u73b0\u810f\u8bfb\uff08dirty reads\uff09\uff0c\u4e0d\u53ef\u91cd\u590d\u8bfb\uff08non-repeatable reads\uff09\u548c\u5e7b\u8bfb\uff08phantom reads \uff09\u73b0\u8c61\u800c\u9009\u62e9\u76f8\u5e94\u7684\u9694\u79bb\u7ea7\u522b\u3002\u4f8b\u5982\u5728\u5927\u6570\u636e\u4e2d\uff0c\u5c11\u91cf\u7684\u6570\u636e\u4e0d\u4e00\u81f4\u4e0d\u4f1a\u5f71\u54cd\u5230\u6700\u540e\u7684\u51b3\u7b56\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u53ef\u4ee5\u4f7f\u7528\u8f83\u4f4e\u7684\u9694\u79bb\u7ea7\u522b\u4ee5\u63d0\u4ea4\u6027\u80fd\u548c\u5e76\u53d1\u6027\u3002<\/li>\n<\/ol>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u5c31\u662frepeatable-read<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>transaction_isolation = READ-COMMITTED<\/p>\n<p>11)explicit_defaults_for_timestamp<\/p><\/blockquote>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>1<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<ol>\n<li>mysql5.7\u9ed8\u8ba4\u5bf9\u4e8etimestamp\u5b57\u6bb5\u4f1a\u663e\u793a\u201c\u7cfb\u7edf\u5f53\u524d\u65e5\u671f\u201d\uff0c\u5c31\u7b97\u4f60\u5728\u63d2\u8868\u65f6\u8fd9\u4e2atimestamp\u5b57\u6bb5\u7559\u7a7a\uff0c\u5b83\u5728select\u51fa\u6765\u65f6\u4e5f\u4f1a\u663e\u793a\u7cfb\u7edf\u65e5\u671f\u3002\u56e0\u6b64\uff0c\u8fd9\u4e2a\u503c\u7684\u5f71\u54cd\u8303\u56f4\u662f\u4f60\u5728\u5efa\u8868\u65f6\u5bfc\u81f4\u7684\u3002<\/li>\n<li>\u7cfb\u7edf\u9ed8\u8ba4\u8fd9\u4e2a\u503c\u662f0\uff0c\u57280\u7684\u60c5\u51b5\u4e0b\uff0c\u4f60\u8981\u8ba9\u8be5\u8868\u7684timestamp\u5b57\u6bb5\u5728\u4e3anull\u65f6\u4e0d\u663e\u793a\u7cfb\u7edf\u9ed8\u8ba4\u65f6\u95f4\uff0c\u4f60\u7684\u5efa\u8868\u5fc5\u987b\u4e3a\uff1acreate table order(o_id int ,updateed_time timestamp null default null) ;<\/li>\n<li>explicit_defaults_for_timestamp \u53d8\u91cf\u4f1a\u76f4\u63a5\u5f71\u54cd\u8868\u7ed3\u6784\uff0c\u4e5f\u5c31\u662f\u8bf4explicit_defaults_for_timestamp\u7684\u4f5c\u7528\u65f6\u95f4\u662f\u5728\u8868\u5b9a\u4e49\u7684\u65f6\u5019\uff1b\u4f60\u7684update | insert \u60f3\u901a\u8fc7\u5b83\u53bb\u6539\u53d8\u884c\u4e3a\u5df2\u7ecf\u592a\u665a\u4e86\uff01<\/li>\n<li>\u56e0\u6b64\uff0c\u6211\u63a8\u8350\u628a\u8fd9\u4e2a\u503c\u8bbe\u4e3a1.<\/li>\n<\/ol>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u4e3a0<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>explicit_defaults_for_timestamp = 1<\/p><\/blockquote>\n<p><b>12)join_buffer_size<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>16M<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<ol>\n<li>\u7cfb\u7edf\u9ed8\u8ba4\u5927\u5c0f\u4e3a\uff1a512k\uff0cmac\u4e0b\u9ed8\u8ba4\u5927\u5c0f\u4e3a\uff1a256k\uff0c\u9488\u5bf9128GB\uff0c1\u4e07\u5e76\u53d1\u7684mysql\u6211\u63a8\u8350\u7ed9\u5230\u7684\u503c\u4e3a\uff1a8~16M<\/li>\n<li>\u5bf9\u4e8eJOIN KEY \u6709\u7d22\u5f15\u548c\u4e8c\u7ea7\u7d22\u5f15\uff0cJOIN KEY \u65e0\u7d22\u5f15mysql\u4f1a\u4f7f\u7528\u5230join_buffer_size\uff0c\u4e00\u822c\u5efa\u8bae\u8bbe\u7f6e\u4e00\u4e2a\u5f88\u5c0f\u7684 GLOBAL \u503c\uff0c\u5b8c\u4e86\u5728 SESSION \u6216\u8005 QUERY \u7684\u57fa\u7840\u4e0a\u6765\u505a\u4e00\u4e2a\u5408\u9002\u7684\u8c03\u6574\u3002\u5982\u679c\u4f60\u62cd\u8111\u888b\u7ed9\u4e5f\u4e2a4g\uff0c\u6211\u4eec\u67091000\u4e2a\u5e76\u53d1\uff0c\u5c31\u662f\u7528\u6389\u4e864T\u7684\u5185\u5b58\u3002\u3002\u30024T\u554a\u3002\u3002\u3002\u4f60\u4ee5\u4e3a\u4f60\u662f\u5c0f\u578b\u673a\u3002\u9002\u5f53\u7684\u53bb\u6539\u53d8\u5b83\u786e\u5b9e\u53ef\u4ee5\u5e26\u6765\u4e00\u5b9a\u7684\u63d0\u901f\uff0c\u4f46\u5e76\u4e0d\u662f\u8bf4\u5f88\u591a\u503c\u8d8a\u5927\u8d8a\u597d\uff0c\u4e3a\u4ec0\u4e48\u6211\u4eec\u8bbe\u7f6e\u62104m\u5462\uff1f\u6211\u4eec\u5047\u8bbe\u6211\u4eec\u7684mysql\u6240\u5728\u7684vm\u662f128gb\uff0c\u4e00\u6839\u8fd9\u6837\u7684join\uff08\u5982\u679c\u88ab\u7528\u5230\uff09\u662f4M\uff0c1\u4e07\u4e2a\u4e5f\u4e0d\u8fc7\u7528\u638940G,\u800c\u6839\u636e\u5b98\u65b9\u8bf4\u6cd5\uff0ctotal\u52a0\u5728\u4e00\u8d77\u4ea7\u751f\u7684join_buffer_size\u4e0d\u8981\u8d85\u8fc7\u4f60\u6240\u5728\u7cfb\u7edf\u768450%.\u9ed8\u8ba4512k\u80af\u5b9a\u662f\u5c0f\u4e86\u70b9\uff0c\u6211\u4eec\u53ef\u4ee5\u9002\u5f53\u653e\u5bbd\uff0c\u6bd4\u5982\u8bf4\uff1a2M\uff0c\u5728\u5b9e\u9645\u4f7f\u7528\u573a\u666f\u65f6\u6211\u4eec\u53d1\u89c9\u6709\u8fd9\u6837\u7684\u9ad8\u9891\u64cd\u4f5c\uff08\u8981\u770b\u9ad8\u9891\u51fa\u73b0\u7684\u6709\u610f\u4e49\u7684sql\u7684\u6267\u884c\u8ba1\u5212\uff0c\u5e76\u786e\u8ba4\u8be5\u8ba1\u5212\u7684\uff1a\u6267\u884ccost\u5982\uff1a \"query_cost\": \"1003179606.87\"\uff0c\u5b83\u4ea7\u751f\u7684cost\u4e3a\uff1a0.93\u4e2aG,\u5982\u679c\u5b83\u771f\u7684\u5f88\u9ad8\u9891\u51fa\u73b0\u5728\u8c03\u4f18sql\u5230\u65e0\u6cd5\u8c03\u4f18\u7684\u7a0b\u5ea6\uff0c\u6211\u4eec\u4f1a\u53bb\u505aset session join_buffer_size = 1024 * 1024 * 1024;\u8fd9\u6837\u7684\u64cd\u4f5c\u3002\u800c\u4e0d\u662f\u5728\u4e00\u5f00\u59cb\u7684my.cnf\u4e2d\u53bb\u5206\u914d\u4e00\u4e2a\u66b4\u5927\u7684\u503c\uff0c\u6211\u4eec\u8fd9\u8fb9\u57fa\u4e8e128gb\uff0c1\u4e07connection\u7684\u5e76\u53d1\u6765\u8bf4\uff0c\u4f60\u7ed9\u4e2a16M\u4e0d\u7b97\u5c0f\u4e5f\u4e0d\u7b97\u591a\uff0c\u6211\u63a8\u8350\u7ed9\u52308~16M\u95f4\uff08\u8fd9\u662f\u6307\u5728\u4e00\u5f00\u59cb\uff09\u3002<\/li>\n<\/ol>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u7684\u4e3a256k<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>join_buffer_size = 16M<\/p><\/blockquote>\n<p><b>13)tmp_table_size<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>67108864<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<ol>\n<li>\u5982\u679c\u662f128gb\u5185\u5b58\u7684\u670d\u52a1\u5668\uff0c\u6211\u5efa\u8bae\u662f\u5728my.cnf\u4e2d\u8bbe\u621064M<\/li>\n<li>\u901a\u8fc7\u8bbe\u7f6etmp_table_size\u9009\u9879\u6765\u589e\u52a0\u4e00\u5f20\u4e34\u65f6\u8868\u7684\u5927\u5c0f\uff0c\u4f8b\u5982\u505a\u9ad8\u7ea7GROUP BY\u64cd\u4f5c\u751f\u6210\u7684\u4e34\u65f6\u8868\u3002\u9ed8\u8ba4\u7cfb\u7edf\u4e3a32M\uff0c\u5982\u679c\u5f53\u4f60\u7684\u4e34\u65f6\u8868\u8d8a\u6765\u8d8a\u591a\u52a0\u5728\u4e00\u8d77\u8d85\u8fc7\u4e86\u8fd9\u4e2a\u503c\uff0c\u90a3\u4e48mysql\u4f1a\u5728\u7cfb\u7edf\u78c1\u76d8\u4e0a\u521b\u5efa\uff0c\u8fd9\u4e2a\u503c\u4e0d\u662f\u8d8a\u591a\u8d8a\u597d\uff0c\u4e5f\u6ca1\u6709\u4e00\u4e2a\u5408\u9002\u7684\u503c\u3002\u4e00\u5f00\u59cb\u7684\u5efa\u8bae\u4e3a&gt;64M\uff0c\u7136\u540e\u5728\u8fd0\u884c\u65f6\u6211\u4eec\u901a\u8fc7\u4ee5\u4e0b\u516c\u5f0f\u6765\u505a\u4e34\u65f6\u8c03\u4f18\uff0c<\/li>\n<li>show global status like 'created_tmp%';<\/li>\n<li>\u628a\u5f97\u5230\u7684\u7ed3\u679c\u4e2d\u7684\uff1a(Created_tmp_disk_tables \/ Created_tmp_tables) * 100% \u5982\u679c&lt;=25%\u4e3a\u6700\u4f73\u503c\u3002\u6ce8\u610f\u4e86\uff0c\u5728\u751f\u4ea7\u65f6\u70ed\u8bbe\u5b9a\u65f6\u4e00\u5b9a\u8981\u7528\u7c7b\u4f3c\u4ee5\u4e0b\u7b97\u6cd5\uff1a<\/li>\n<li>set global tmp_table_size=64*1024*1024\u800c\u4e0d\u662fset global tmp_table_size=64M\u3002<\/li>\n<\/ol>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u4e3a32M<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>tmp_table_size = 67108864<\/p><\/blockquote>\n<p><b>14)tmpdir<\/b><\/p>\n<p>\u8fd9\u5757\u53c2\u6570\u53ef\u4ee5\u8ba9\u8fd0\u7ef4\u7ed9\u5230\uff0c\u653e\u5230\u5927\u7a7a\u95f4\u91cc\u5c31\u884c\u4e86\uff0c\u6ca1\u4ec0\u4e48\u592a\u654f\u611f\u7684\u3002<\/p>\n<p><b>15)max_allowed_packet<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>134217728<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<ol>\n<li>\u5982\u679c\u4f60\u7ecf\u5e38\u5728\u5e94\u7528\u5c42\u78b0\u5230\u4e86\uff1aGot a packet bigger than'max_allowed_packet' bytes\uff0c\u8fd9\u65f6\u4f60\u53ef\u4ee5\u4f7f\u7528<\/li>\n<li>show variables like '%max_allowed_packet%';\u6765\u67e5\u770b\u8fd9\u4e2a\u503c\uff0c\u8fd9\u4e2a\u503c\u6ca1\u6709\u5408\u9002\uff0c\u4e00\u822c\u5982\uff1a\u7528\u5ba2\u6237\u7aef\u5bfc\u5165\u6570\u636e\u7684\u65f6\u5019\uff0c\u9047\u5230 \u9519\u8bef\u4ee3\u7801: 1153 - Got a packet bigger than 'max_allowed_packet' bytes \u7ec8\u6b62\u4e86\u6570\u636e\u5bfc\u5165\u3002\u8fd9\u6837\u7684\u573a\u666f\u4e0b\uff0c\u5f53MySQL\u5ba2\u6237\u7aef\u6216mysqld\u670d\u52a1\u5668\u6536\u5230\u5927\u4e8emax_allowed_packet\u5b57\u8282\u7684\u4fe1\u606f\u5305\u65f6\uff0c\u5c06\u53d1\u51fa\u201c\u4fe1\u606f\u5305\u8fc7\u5927\u201d\u9519\u8bef\uff0c\u5e76\u5173\u95ed\u8fde\u63a5\u3002\u5bf9\u4e8e\u67d0\u4e9b\u5ba2\u6237\u7aef\uff0c\u5982\u679c\u901a\u4fe1\u4fe1\u606f\u5305\u8fc7\u5927\uff0c\u5728\u6267\u884c\u67e5\u8be2\u671f\u95f4\uff0c\u53ef\u80fd\u4f1a\u9047\u5230\u201c\u4e22\u5931\u4e0eMySQL\u670d\u52a1\u5668\u7684\u8fde\u63a5\u201d\u9519\u8bef\u3002<\/li>\n<li>\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u5747\u6709\u81ea\u5df1\u7684max_allowed_packet\u53d8\u91cf\uff0c\u56e0\u6b64\uff0c\u5982\u4f60\u6253\u7b97\u5904\u7406\u5927\u7684\u4fe1\u606f\u5305\uff0c\u5fc5\u987b\u589e\u52a0\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4e0a\u7684\u8be5\u53d8\u91cf\u3002\u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u670d\u52a1\u5668\u9ed8\u8ba4max-allowed-packet\u4e3a1MB,\u53ef\u4ee5\u901a\u8fc7\u5728\u4ea4\u6362\u673a\u4e0a\u6293\u5305\u6216\u8005\u662f\u56fe\u5f62\u5316\u5206\u6790\u6765\u6293\u8fd4\u56de\u7ed3\u679c\u5224\u65ad\u3002\u4e00\u822c\u63a8\u8350\u5728128gb\u5185\u5b58\u4e0b\u8bbe\u7f6e\u7684\u7f6e\u4e3a128M.\u4e5f\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u8c03\u6574\uff1aset global max_allowed_packet = 128*1024*1024<\/li>\n<\/ol>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>1M<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>max_allowed_packet = 134217728<\/p><\/blockquote>\n<p><b>16)sql_mode<\/b><\/p>\n<p>\u4e0d\u9700\u8981\u53bb\u8bbe\u7f6e\uff0c\u4f7f\u7528\u9ed8\u8ba4\u7684\uff0c\u8fd9\u5757\u548c\u6027\u80fd\u65e0\u5173\u3002\u6211\u4eec\u7684\u4e2d\u53f0\u4e2d\u7684sql\u5982\u679c\u78b0\u5230\u6709sql\u62a5\u9519\uff0c\u56e0\u8be5\u662f\u5728\u6d4b\u8bd5\u73af\u5883\u4e0a\u5c31\u5df2\u7ecf\u62a5\u4e86\uff0c\u5b83\u7684\u4f5c\u7528\u662f\u7528\u6765\u7ea6\u675f\u4f60sql\u7684\u5199\u6cd5\u7684\uff0c\u5982\u679c\u662f\u4e00\u4e2a\u4ece\u5934\u5f00\u59cb\u5f00\u53d1\u7684\u5e94\u7528\uff0c\u6211\u4eec\u6bd4\u5982\u8bf4\u7ea6\u675f\u597d\u90fd\u662fansi sql\u5199\u6cd5\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u4ea7\u54c1\uff0c\u4e0d\u8981\u53bb\u505a\u8fd9\u79cd\u753b\u86c7\u6dfb\u8db3\u7684\u505a\u6cd5\u3002<\/p>\n<p><b>17)interactive_timeout<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>600<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<ol>\n<li>\u5355\u4f4d\u4e3as\uff0c\u7cfb\u7edf\u9ed8\u8ba4\u4e3a\uff1a28800s\u53738\u5c0f\u65f6\u3002\u5982\u679c\u8fd92\u4e2a\u503c\u592a\u5927\uff0c\u4f60\u4f1a\u53d1\u89c9\u5728mysql\u4e2d\u6709\u5927\u91cfsleep\u7684\u8fde\u63a5\uff0c\u8fd9\u4e9b\u8fde\u63a5\u53c8\u88ab\u79f0\u4e3a\uff1a\u50f5\u5c38\u8fde\u63a5\uff0c\u50f5\u5c38\u8fde\u63a5\u4e00\u591a\u4f60\u771f\u6b63\u8981\u7528\u7684\u65f6\u5019\u5c31\u4f1a\u629b\uff1atoo many connection\u8fd9\u6837\u7684\u9519\uff0c\u56e0\u6b64\u5bf9\u4e8e\u957f\u4e45\u4e0d\u7528\u7684\u8fde\u63a5\uff0c\u6211\u4eec\u4e00\u822c\u8981\u4f7f\u7528\u201c\u8e22\u51fa\u673a\u5236\u201d\uff0c\u591a\u4e45\u5bf9\u4e8e\u4e00\u4e2a\u6d3b\u52a8\u7d2f\u7684sql\u8fdb\u884c\u8e22\u5462\uff1f\u6211\u4eec\u8bf4\u5982\u679c\u6709\u4e00\u4e2a\u957f\u4e8b\u52a1\uff0c\u5b83\u8981\u6267\u884c1\u5c0f\u65f6\uff0c\u6211\u4e0d\u77e5\u9053\u8fd9\u662f\u4e0d\u662f\u5c5e\u4e8e\u6b63\u5e38\uff1f\u5f53\u7136\u5982\u679c\u4f60\u8bbe\u4e86\u592a\u77ed\uff0c\u8bf41\u5206\u949f\u5c31\u628a\u5b83\u8e22\u4e86\uff0c\u8fd8\u771f\u4e0d\u4e00\u5b9a\u8e22\u7684\u5bf9\uff0c\u6309\u7167\u6211\u4eec\u5728oracle\u4e2d\u8bbe\u7f6e\u7684best practice\u6211\u4eec\u90fd\u4f1a\u628a\u5b83\u653e\u523010\u5206\u949f\u3002\u4f60\u6709\u4e00\u6761sql\u8fde\u7740\uff0c10\u5206\u949f\u4e0d\u7528\uff0c\u6211\u5c31\u628a\u5b83\u8e22\u4e86\uff0c\u8fd9\u4e5f\u7b97\u6b63\u5e38\u3002\u4f46\u662f\u5728\u9ad8\u5e76\u53d1\u7684\u573a\u666f\u4e0b\u8fd9\u4e2atimeout\u4f1a\u7f29\u77ed\u81f33-5\u5206\u949f\uff0c\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u6211\u63d0\u5021\u6211\u4eec\u7684\u975e\u62a5\u8868\u5373\u65f6\u7c7b\u67e5\u8be2\u9700\u8981\u4f18\u5316\u5230sql\u7684\u8fd0\u884c\u65f6\u95f4\u4e0d\u8d85\u8fc7300ms\u7684\u539f\u56e0\uff0c\u56e0\u4e3a\u5728\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\uff0c\u8d85\u8fc7500ms\u7684sql\u90fd\u5df2\u7ecf\u5f88\u5938\u5f20\u4e86\u3002\u4fdd\u5b88\u70b9\u6211\u89c9\u5f97\u53ef\u4ee5\u8bbe\u621010\u5206\u948f\uff0c\u5728\u5e94\u7528\u7aef\u7531\u5176\u901a\u8fc7jdbc\u8fde\u63a5\u6570\u636e\u5e93\u7684\uff0c\u505a\u7684\u597d\u7684\u5e94\u7528\u90fd\u4f1a\u5728jdbc\u91cc\u6709\u4e00\u4e2aautoconnect\u53c2\u6570\uff0c\u8fd9\u4e2aautoconnect\u53c2\u6570\u5c31\u8981\u548cmysql\u4e2d\u7684wait_timeout\u6765\u505a\u5339\u914d\u4e86\u3002\u540c\u65f6\u5728\u5e94\u7528\u7aef\u8981\u6709\u76f8\u5e94\u7684validate sql\u4e00\u7c7b\u7684\u64cd\u4f5c\u6765keep alived\u3002\u4e0d\u8fc7\u6211\u66f4\u63a8\u8350\u4f7f\u7528\u201d\u8fde\u63a5\u6c60\u5185\u8fde\u63a5\u7684\u751f\u5b58\u5468\u671f\uff08idleConnectionTestPeriod\uff09\u201d\u6765\u505a\u8bbe\u7f6e\uff0c\u628a\u8fd9\u4e2a\u7f6e\u8bbe\u6210&lt;mysql\u5185\u7684\u8fd9\u4e24\u4e2a\u503c\u5c06\u4f1a\u662f\u6700\u597d\uff0c\u540c\u65f6\uff0cidleConnectionTestPeriod\u4f1a\u4f7f\u7528\u5230\u5f02\u6b65\u7684\u65b9\u5f0f\u53bb\u505a\u8d85\u65f6check\u3002\u5982c3p0\u4e2d\u7684\uff1aidleConnectionTestPeriod\u548ctestConnectionOnCheckin\u76f8\u5f53\u53ef\u9760<\/li>\n<li>interactive_timeout\uff1a\u4ea4\u4e92\u5f0f\u8fde\u63a5\u8d85\u65f6\u65f6\u95f4(mysql\u5de5\u5177\u3001mysqldump\u7b49)<\/li>\n<li>wait_timeout\uff1a\u975e\u4ea4\u4e92\u5f0f\u8fde\u63a5\u8d85\u65f6\u65f6\u95f4\uff0c\u9ed8\u8ba4\u7684\u8fde\u63a5mysql api\u7a0b\u5e8f,jdbc\u8fde\u63a5\u6570\u636e\u5e93\u7b49<\/li>\n<li>interactive_timeout\u9488\u5bf9\u4ea4\u4e92\u5f0f\u8fde\u63a5\uff0cwait_timeout\u9488\u5bf9\u975e\u4ea4\u4e92\u5f0f\u8fde\u63a5\u3002\u6240\u8c13\u7684\u4ea4\u4e92\u5f0f\u8fde\u63a5\uff0c\u5373\u5728mysql_real_connect()\u51fd\u6570\u4e2d\u4f7f\u7528\u4e86CLIENT_INTERACTIVE\u9009\u9879\u3002<\/li>\n<\/ol>\n<pre class=\"hljs bash\"><code class=\"hljs bash copyable\" lang=\"bash\">show global variables like <span class=\"hljs-string\">'wait_timeout'<\/span>;<span class=\"copy-code-btn\">\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n<p>1 timeout \u53ea\u662f\u9488\u5bf9\u7a7a\u95f2\u4f1a\u8bdd\u6709\u5f71\u54cd\u3002<\/p>\n<p>2 session\u7ea7\u522b\u7684wait_timeout\u7ee7\u627fglobal\u7ea7\u522b\u7684interactive_timeout\u7684\u503c\u3002\u800cglobal\u7ea7\u522b\u7684session\u5219\u4e0d\u53d7interactive_timeout\u7684\u5f71\u54cd\u3002<\/p>\n<p>3 \u4ea4\u4e92\u5f0f\u4f1a\u8bdd\u7684timeout\u65f6\u95f4\u53d7global\u7ea7\u522b\u7684interactive_timeout\u5f71\u54cd\u3002\u56e0\u6b64\u8981\u4fee\u6539\u975e\u4ea4\u4e92\u6a21\u5f0f\u4e0b\u7684timeout\uff0c\u5fc5\u987b\u540c\u65f6\u4fee\u6539interactive_timeout\u7684\u503c\u3002<\/p>\n<p>4 \u975e\u4ea4\u4e92\u6a21\u5f0f\u4e0b\uff0cwait_timeout\u53c2\u6570\u7ee7\u627fglobal\u7ea7\u522b\u7684wait_timeout\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u7cfb\u7edf\u9ed8\u8ba4\u4e3a28800<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>interactive_timeout = 600<\/p><\/blockquote>\n<p><b>18)wait_timeout<\/b><\/p>\n<p>\u540cinteractive_timeout\uff0c\u4e24\u4e2a\u503c\u90fd\u8bbe\u6210\u4e00\u6837\u3002<\/p>\n<p><b>19)read_buffer_size<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>4194304<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u8fd9\u4e2a\u503c\u5176\u5b9e\u8f7b\u6613\u662f\u7528\u4e0d\u5230\u7684\uff0c\u56e0\u4e3a\uff0c\u5b83\u53ea\u5bf92\u79cd\u573a\u666f\u7684full table scan\u4ea7\u751f\u5f71\u54cd\u800c\u4e0d\u662f\u6240\u6709\u7684full table scan\uff0c\u540c\u65f6\u4ecemysql5.6\u4ee5\u540e\u5f00\u59cb\u6ca1\u6709\u6570\u636e\u5757\u591a\u5757\u8bfb\u7684\u529f\u80fd,\u4e0e\u662f\u5426\u8bbe\u7f6e read_buffer_size\u53c2\u6570\u65e0\u5173\u3002\u5e94\u7528\u573a\u666f\uff1a<\/p>\n<p>1\uff09SELECT INTO \u2026 OUTFILE \u2018fileName\u2018<\/p>\n<p>2\uff09When filesort is used, during merge buffers and when merged results are written to a temporary file, then writes are buffered<\/p>\n<p>\u4e00\u822c\u4fdd\u7559\u9ed8\u8ba4:64k\uff0c\u4fdd\u5b88\u4f5c\u6cd5\u662f\u8bbe\u7f6e\u57281\uff5e4M\uff0c\u4e0d\u8fc7\u5b83\u7684\u5e94\u7528\u573a\u666f\u5f88\u6709\u9650\uff0c\u5bf9\u4e8e\u4e92\u8054\u7f51\u573a\u666f\u771f\u7684\u4e0d\u592a\u7528\uff0c\u6211\u63a8\u8350\u8bbe\u62104M<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u4e3a64k<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>read_buffer_size = 4194304<\/p><\/blockquote>\n<p><b>20)read_rnd_buffer_size<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>8388608<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u5c31\u662f\u5f53\u6570\u636e\u5757\u7684\u8bfb\u53d6\u9700\u8981\u6ee1\u8db3\u4e00\u5b9a\u7684\u987a\u5e8f\u7684\u60c5\u51b5\u4e0b\uff0cMySQL \u5c31\u9700\u8981\u4ea7\u751f\u968f\u673a\u8bfb\u53d6\uff0c\u8fdb\u800c\u4f7f\u7528\u5230 read_rnd_buffer_size \u53c2\u6570\u6240\u8bbe\u7f6e\u7684\u5185\u5b58\u7f13\u51b2\u533a\u3002\u5b83\u7684\u9ed8\u8ba4\u4e3a256k\uff0c\u6700\u5927\u53ef\u4ee5\u8bbe\u52302G\uff0c\u5b83\u4f1a\u5bf9order by\u5173\u952e\u5b57\u8d77\u4f5c\u7528\uff0c\u5f53order by\u7684\u8ba1\u5212\u6210\u672c\u8d85\u51fa\u4e86sort_buffer_size\u540e\uff0cmysql\u4f1a\u4ea7\u7528\u968f\u673a\u8bfb\u53d6\u5e76\u6d88\u8017\u989d\u5916\u7684\u5185\u5bb9\uff0c\u5f88\u591a\u5916\u9762\u7684\u535a\u5ba2\u8bf4\u5b83\u662f\u53ea\u5bf9myisam\u5f15\u64ce\u8d77\u4f5c\u7528\uff0c\u4f46\u5176\u5b9e\u4e0d\u662f\uff0c\u8be5\u53c2\u6570\u8fd8\u771f\u7684\u8986\u76d6\u5230\u6240\u6709\u5f15\u64ce\uff0c\u4e00\u822c\u5b83\u7684\u63a8\u8350\u8bbe\u7f6e\u57288-16M\uff0c\u6211\u63a8\u83508M\uff0c\u6839\u636esql\u5206\u6790\u8ba1\u5212\u5982\u679c\u78b0\u5230\u9ad8\u9891\u7684\u67e5\u8be2\u4e14order by\u7684\u8fd4\u56de\u5305\u4f53\u90fd\u5f88\u5927\uff0c\u90a3\u4e48\u518d\u5728session\u7ea7\u522b\u53bb\u653e\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u4e3a256k<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>read_rnd_buffer_size = 8388608<\/p><\/blockquote>\n<p><b>21)sort_buffer_size<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>4194304<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u6bcf\u4e2a\u4f1a\u8bdd\u6267\u884c\u6392\u5e8f\u64cd\u4f5c\u6240\u5206\u914d\u7684\u5185\u5b58\u5927\u5c0f\u3002\u60f3\u8981\u589e\u5927max_sort_length\u53c2\u6570\uff0c\u9700\u8981\u589e\u5927sort_buffer_size\u53c2\u6570\u3002\u5982\u679c\u5728SHOW GLOBAL STATUS\u8f93\u51fa\u7ed3\u679c\u4e2d\u770b\u5230\u6bcf\u79d2\u8f93\u51fa\u7684Sort_merge_passes\u72b6\u6001\u53c2\u6570\u5f88\u5927\uff0c\u53ef\u4ee5\u8003\u8651\u589e\u5927sort_buffer_size\u8fd9\u4e2a\u503c\u6765\u63d0\u9ad8ORDER BY \u548c GROUP BY\u7684\u5904\u7406\u901f\u5ea6\u3002\u5efa\u8bae\u8bbe\u7f6e\u4e3a1~4MB\u3002\u5f53\u4e2a\u522b\u4f1a\u8bdd\u9700\u8981\u6267\u884c\u5927\u7684\u6392\u5e8f\u64cd\u4f5c\u65f6\uff0c\u5728\u4f1a\u8bdd\u7ea7\u522b\u589e\u5927\u8fd9\u4e2a\u53c2\u6570\u3002\u6240\u8c13\u4f1a\u8bdd\u7ea7\u522b\uff0c\u6211\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u4f60\u62cd\u8111\u888b\u4e00\u4e0b\uff0c\u8bf4\u6211\u8bbe\u4e2a32M,\u4f60\u6240\u5b83\u4e5810,000\u8bf7\u6c42\uff0c\u8fd9\u5f97\u591a\u5927\u5185\u5b58\u3002\u53e6\u5916\uff0c\u5343\u4e07\u8981\u6ce8\u610f\uff0c\u5728mysql\u5185\u5b58\uff0c\u5f53\u4f60\u7684sort_buffer_size\u5728\u8d85\u8fc72K\u65f6\u5728\u5e95\u5c42\u4f7f\u7528\u7684\u662fmmap()\u7684c\u51fd\u6570\u53bb\u505a\u5185\u5b58\u5206\u914d\u7684\uff0c\u800c\u4e0d\u662fmalloc()\uff0c\u505a\u8fc7c\u7684\u90fd\u77e5\u9053mmap()\u662f\u4e00\u4e2a\u77e2\u91cf\u5355\u4f4d\uff0c\u56e0\u6b64\u5b83\u4f1a\u4ed8\u51fa\u6027\u80fd\u7684\u5f71\u54cd\uff0c\u80fd\u5f71\u54cd\u591a\u5c11\u5462\uff1f\u5355\u6761sql\u5f71\u54cd\u503c\u572830%\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u503c\u4e3a1M<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>sort_buffer_size =4194304<\/p><\/blockquote>\n<p><b>22)innodb_page_size<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>8192<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<ol>\n<li>\u8fd9\u4e2a\u503c\u53ef\u8981\u5c0f\u5fc3\uff0c\u4e00\u822c\u5b83\u5728\u8bbe\u7f6e\u540e\u5c31\u4e0d\u80fd\u8f7b\u6613\u6539\u4e86\uff0c\u4e00\u822c\u6765\u8bf4\u6211\u4eec\u90fd\u8ba4\u4e3a\uff0c\u503c\u8d8a\u5927\u8d8a\u597d\uff0c\u4e0d\u662f\u7684\uff0c \u8fd9\u4e2a\u503c\u5b83\u7684\u539f\u7406\u662f\u8fd9\u6837\u7684\uff1asize\u8d8a\u5c0f\uff0c\u5185\u5b58\u5212\u5206\u7c92\u5ea6\u8d8a\u5927\uff0c\u4f7f\u7528\u7387\u8d8a\u9ad8\uff0c\u4f46\u662f\u4f1a\u6709\u5176\u4ed6\u95ee\u9898\uff0c\u5c31\u662f\u9650\u5236\u4e86\u7d22\u5f15\u5b57\u6bb5\u8fd8\u6709\u6574\u884c\u7684\u5927\u5c0f\u3002innodb\u5f15\u64ce\u8bfb\u53d6\u5185\u5b58\u8fd8\u6709\u66f4\u65b0\u90fd\u662f\u4e00\u9875\u4e00\u9875\u66f4\u65b0\u7684\uff0c\u8fd9\u4e2ainnodb_page_size\u51b3\u5b9a\u4e86\uff0c\u4e00\u4e2a\u57fa\u672c\u9875\u7684\u5927\u5c0f\u3002\u5e38\u7528B+Tree\u7d22\u5f15\uff0cB+\u6811\u662f\u4e3a\u78c1\u76d8\u53ca\u5176\u4ed6\u5b58\u50a8\u8f85\u52a9\u8bbe\u5907\u800c\u8bbe\u8ba1\u4e00\u79cd\u5e73\u8861\u67e5\u627e\u6811\uff08\u4e0d\u662f\u4e8c\u53c9\u6811\uff09\u3002B+\u6811\u4e2d\uff0c\u6240\u6709\u8bb0\u5f55\u7684\u8282\u70b9\u6309\u5927\u5c0f\u987a\u5e8f\u5b58\u653e\u5728\u540c\u4e00\u5c42\u7684\u53f6\u5b50\u8282\u70b9\u4e2d\uff0c\u5404\u53f6\u5b50\u8282\u70b9\u7528\u6307\u9488\u8fdb\u884c\u8fde\u63a5\u3002MySQL\u5c06\u6bcf\u4e2a\u53f6\u5b50\u8282\u70b9\u7684\u5927\u5c0f\u8bbe\u7f6e\u4e3a\u4e00\u4e2a\u9875\u7684\u6574\u6570\u500d\uff0c\u5229\u7528\u78c1\u76d8\u7684\u9884\u8bfb\u673a\u5236\uff0c\u80fd\u6709\u6548\u51cf\u5c11\u78c1\u76d8I\/O\u6b21\u6570\uff0c\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\u3002 \u5982\u679c\u4e00\u4e2a\u884c\u6570\u636e\uff0c\u8d85\u8fc7\u4e86\u4e00\u9875\u7684\u4e00\u534a\uff0c\u90a3\u4e48\u4e00\u4e2a\u9875\u53ea\u80fd\u5bb9\u7eb3\u4e00\u6761\u8bb0\u5f55\uff0c\u8fd9\u6837B+Tree\u5728\u4e0d\u7406\u60f3\u7684\u60c5\u51b5\u4e0b\u5c31\u53d8\u6210\u4e86\u53cc\u5411\u94fe\u8868\u3002\u6211\u4eec\u62ff\u767d\u8bdd\u6765\u8bf4\u5c31\u662f\uff1a\u4f60\u8d8a\u5927\uff0c\u7a7a\u95f4\u5229\u7528\u7387\u66f4\u9ad8\uff0c\u4f46\u662f\u8d8a\u5c0f\u5462\u8d8a\u6709\u52a9\u4e8e\u6027\u80fd\u4f46\u662f\u8fd9\u8fb9\u4e00\u5b9a\u4e00\u5b9a\u6709\u4e00\u4e2a\u201c\u4f46\u662f\u201d\uff0c\u4f46\u662f\u5c0f\u5230\u4e00\u5b9a\u7684\u91cf\u53cd\u800c\u6027\u80fd\u4e0d\u597d\uff0c\u4e3a\u4ec0\u4e48\u5462\uff1f\u592a\u5927\u4e0a\u9762\u6211\u5df2\u7ecf\u4e3e\u4f8b\u4e86\uff0c\u592a\u5c0f\u3002\u3002\u3002mysql\u7684\u9875\u95f4\u7684check point\u592a\u9891\u7e41\u3002\u600e\u4e48\u6837\u505a\u624d\u80fd\u8fbe\u5230\u4e00\u4e2a\u5408\u7406\u503c\u5462\uff1f<\/li>\n<li>\u8fd9\u4e2a\u6211\u4eec\u662f\u5728\u5168\u771f\u751f\u4ea7\u73af\u5883\u3001\u5168\u6570\u636e\u91cf\u4e0b\u7528\u6d4b\u8bd5\u5de5\u5177\u53bb\u5bf94k,8k,16k\u4e09\u79cd\u573a\u666f\u538b\u6d4b\u5f97\u5230\u7684\u541e\u5410\u91cf\u5373tps\u6765\u505a\u89c2\u5bdf\u7684\uff0c\u6211\u8fd9\u8fb9\u53ef\u4ee5\u7ed9\u51fa\u4e00\u4e2a\u63a8\u8350\u503c\uff0c\u4ee5\u5355\u8868\u8d851000w\u6761\u6570\u636e\u57fa\u4e8e\u4e2d\u53f01.1\u7684\u6570\u636e\u5e93\u7ed3\u679c\uff08\u6bcf\u4e2a\u8868\u90fd\u8d851000w\uff09\uff0c\u6211\u4eec\u5728\u8bbe\u7f6e\u8be5\u503c\u4e3a\uff1a8K\u65f6\uff0c\u5b83\u7684\u541e\u5410\u8fbe\u5230\u6700\u4f18\u3002<\/li>\n<\/ol>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>32\u4f4d\u4e0b\u9ed8\u8ba4\u4e3a8192<\/p>\n<p>64\u4f4d\u4e0b\u9ed8\u8ba4\u4e3a16384<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_page_size = 8192<\/p><\/blockquote>\n<p><b>23)innodb_buffer_pool_size<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>72G<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u8fd9\u4e2a\u503c\u548cinnodb_buffer_pool_instances\u76f8\u8f85\u76f8\u6210\u3002\u572832\u4f4d\u673a\u5668\u4e0b\uff0cinnodb_buffer_pool_instances\u4e00\u822c\u4e3a1\uff0c\u572864\u4f4d\u673a\u5668\u4e0a\uff0c\u8fd9\u4e2a\u503c\u4e3a8-64.<\/p>\n<p>pool_instances\u5176\u5b9e\u4e3acpu\u6838\u6570\uff0c\u5b83\u7684\u4f5c\u7528\u662f\uff1a<\/p>\n<p>1\uff09\u5bf9\u4e8e\u7f13\u51b2\u6c60\u5728\u6570\u5343\u5146\u5b57\u8282\u8303\u56f4\u5185\u7684\u7cfb\u7edf\uff0c\u901a\u8fc7\u51cf\u5c11\u4e89\u7528\u4e0d\u540c\u7ebf\u7a0b\u5bf9\u7f13\u5b58\u9875\u9762\u8fdb\u884c\u8bfb\u5199\u7684\u4e89\u7528\uff0c\u5c06\u7f13\u51b2\u6c60\u5212\u5206\u4e3a\u591a\u4e2a\u5355\u72ec\u7684\u5b9e\u4f8b\u53ef\u4ee5\u63d0\u9ad8\u5e76\u53d1\u6027\u3002<\/p>\n<p>2\uff09\u4f7f\u7528\u6563\u5217\u51fd\u6570\u5c06\u5b58\u50a8\u5728\u7f13\u51b2\u6c60\u4e2d\u6216\u4ece\u7f13\u51b2\u6c60\u8bfb\u53d6\u7684\u6bcf\u4e2a\u9875\u9762\u968f\u673a\u5206\u914d\u7ed9\u5176\u4e2d\u4e00\u4e2a\u7f13\u51b2\u6c60\u5b9e\u4f8b\u3002\u6bcf\u4e2a\u7f13\u51b2\u6c60\u7ba1\u7406\u81ea\u5df1\u7684\u7a7a\u95f2\u5217\u8868\uff0c \u5237\u65b0\u5217\u8868\uff0c LRU\u548c\u8fde\u63a5\u5230\u7f13\u51b2\u6c60\u7684\u6240\u6709\u5176\u4ed6\u6570\u636e\u7ed3\u6784\uff0c\u5e76\u53d7\u5176\u81ea\u5df1\u7684\u7f13\u51b2\u6c60\u4e92\u65a5\u91cf\u4fdd\u62a4\u3002<\/p>\n<p>innodb_buffer_pool_size\u7684\u8bbe\u7f6e\u9700\u8981\u4e3apool_instance\u7684\u6574\u6570\u500d\u3002<\/p>\n<p>\u7f51\u4e0a\u5f88\u591a\u8bf4innodb_buffer_pool_size\u4e3a\u7cfb\u7edf\u768470%\uff0c\u8fd9\u662f\u9519\u7684\uff01\u56e0\u4e3a\u4f60\u771f\u7684\u8bbe\u4e8670%\u4f60\u7684swap\u7a7a\u95f4\u4f1a\u88ab\u6324\u538b\uff0c\u4f60\u4e0d\u8981\u5fd8\u4e86\u4f60\u8fd8\u6709os\uff0c\u4e0a\u9762\u8fd8\u53ef\u80fd\u6709\u76d1\u63a7agent\u7aef\u3002\u4e00\u65e6swap\u7a7a\u95f4\u88ab\u6324\u538b\u540e\u4f60\u7684mysql\u53cd\u9762\u4e25\u91cd\u62d6\u6162\u8bfb\u5199\u3002<\/p>\n<p>\u6b64\u5904\u5f3a\u70c8\u5efa\u8bae\u8bbe\u6210\u5185\u5b58\u768420%-65%\u95f4\uff08\u72ec\u7acb\u7684mysql\u670d\u52a1\u5668\uff09\uff0c\u4e3a\u4ec0\u4e48\u6709\u4e00\u4e2a20%\u5462\uff1f\u5bf9\u4e8e&lt;4gb\u7684mysql\u7528\u670d\u52a1\u5668\u6765\u8bf4\u6309\u716720%\u7cfb\u7edf\u5185\u5b58\u6765\u8bbe\u7f6e\u3002\u7531\u4e8e\u6211\u4eec\u662f128gb\u7684\u5185\u5b58\uff0c\u6b64\u5904\u6211\u5efa\u8bae\u4f7f\u752872G,\u5982\u679c\u5185\u5b58\u8d85\u8fc7128gb\uff0c\u4e00\u822c\u6211\u4eec\u4f1a\u628apool instance\u8bbe\u621016\u4e2a\uff0c\u6bcf\u4e2a\u5f00\u542f10g\u5de6\u53f3\u7684buffer_pool_size\uff0c\u5bf9\u4e8e256gb\u5185\u5b58\u7684\u670d\u52a1\u5668\u6765\u8bf4\u6211\u4eec\u53ef\u4ee5\u8fd9\u6837\u8bbe\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u4e3a64<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_buffer_pool_size = 72G<\/p><\/blockquote>\n<p><b>24)innodb_buffer_pool_instances = 8<\/b><\/p>\n<p>\u8fd9\u4e2a\u53c2\u6570\u540cinnodb_buffer_pool_size\u4e00\u8d77\u8bb2\u89e3\u4e86\u3002<\/p>\n<p><b>25)innodb_buffer_pool_load_at_startup<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>0<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u8fd9\u4e24\u4e2a\u53c2\u6570\u51e0\u4e4e\u6ca1\u4eba\u7528\u4e00\u822cdba\u4e5f\u4e0d\u66fe\u542c\u8bf4\u8fc7\uff0c\u5b83\u662f\u4ec0\u4e48\u610f\u601d\u5462\uff1fMysql\u5728\u7b2c\u4e00\u6b21\uff08\u91cd\u542f\uff09\u65f6\uff0c\u5b83\u7684buffer_pool_size\u4e2d\u662f\u7a7a\u7684\uff0c\u968f\u7740mysql\u8fd0\u884c\u65f6\u95f41-2\u5c0f\u65f6\u540e\uff0c\u5b83\u7684buffer_pool_size\u91cc\u5f00\u59cb\u88ab\u585e\u5165\u4e1c\u897f\uff0c\u5b83\u5206\u4e3aold block\u4e0enew block\uff0c\u800c\u6b64\u65f6mysql\u6027\u80fd\u5f00\u59cb\u4e00\u70b9\u70b9\u8bfb\u5199\u6548\u7387\u4e0a\u53bb\u4e86\uff0c\u90a3\u662f\u56e0\u4e3a\u5728buffer_pool_size\u6ca1\u6709\u653e\u5165\u4e1c\u897f\u65f6\uff0cmysql\u5f88\u591a\u8bfb\u5199\u53d1\u751f\u5728\u786c\u76d8\u4e0a\uff0c\u4ece\u786c\u76d8\u5230\u5185\u5b58\u7684\u52a0\u8f7d\u8fc7\u7a0b\u662f\u4e00\u4e2a\u6bd4\u8f83\u6f2b\u957f\u548c\u8017\u65f6\u7684\u8fc7\u7a0b\uff0c\u56e0\u6b64\u6211\u4eec\u5f80\u5f80\u4f1a\u8bbe\u4e00\u4e2astartup=1\u4ee5\u52a0\u5feb\u8fd9\u4e2a\u201c\u9884\u70ed\u201d\u8fc7\u7a0b\uff0c\u5b83\u4e0e\u53c2\u6570shutdown\u914d\u5408\u4f7f\u7528\uff0c\u5373\u76f8\u5f53\u4e8e\u628a\u4e0a\u6b21\u4f7f\u7528\u7684innot_db_buffer_pool\u91cc\u7684\u4e1c\u897f\u5728\u542f\u52a8\u65f6\u5148\u505a\u4e00\u6b21\u52a0\u8f7d\uff0c\u4ee5\u52a0\u5febmysql\u7684\u6027\u80fd\u3002\u5b83\u4f1a\u5728innodb\u7684\u6570\u636e\u76ee\u5f55\u4e2d\u751f\u6210\u4e00\u4e2a\u6587\u4ef6\uff1aib_buffer_pool\u3002\u9ad8\u5ea6\u6ce8\u610f\uff1a\u52a0\u5165\u4e86startup\u548cshutdown=1\u65f6\uff0cmysql\u7684\u542f\u52a8\u8fc7\u7a0b\u4f1a\u6bd4\u8f83\u6162\uff0c\u5982\u679c\u4f60\u4e0a\u6b21\u7684dump\u51fa\u7684buffer_pool\u91cc\u7684\u4e1c\u897f\u670950\u591ag\u90a3\u4e48mysql\u542f\u52a8\u65f6\u7684\u52a0\u8f7d\u8fc7\u7a0b\u4f1a\u53d8\u5f97\u6bd4\u8f83\u6162\u3002\u8fd9\u4e2a\u503c\u5f88\u591a\u4eba\u4f7f\u7528\u9ed8\u8ba4\u76840\uff08\u4e0d\u5f00\u542f\uff09\uff0c\u5b83\u7684\u5f71\u54cd\u5c31\u662f\u4f60\u5728mysql\u91cd\u542f\u540e\uff0c\u4e00\u5f00\u59cb\u4f60\u7684\u7cfb\u7edf\u8bfb\u5199\u6027\u80fd\u4e0d\u5982\u5728\u4f60\u7cfb\u7edf\u8fd0\u884c\u4e862-4\u5c0f\u65f6\uff08\u89c6db\u8bfb\u5199\u800c\u5b9a\uff09\u53cd\u800c\u5b83\u7684\u8bfb\u5199\u6027\u80fd\u53d8\u597d\u4e86\u3002\u4e0d\u8bbe\u4f7f\u7528\u9ed8\u8ba4\u503c\uff080\uff09\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u4e0d\u914d\u7684\u8bdd\u7cfb\u7edf\u9ed8\u8ba4\u4e3a0<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_buffer_pool_load_at_startup = 0<\/p><\/blockquote>\n<p><b>26)innodb_buffer_pool_dump_at_shutdown<\/b><\/p>\n<p>\u540c\u4e0a\u9762\u7684startup\u53c2\u6570\u4ee5\u53ca\u89e3\u8bf4<\/p>\n<p><b>27)innodb_lru_scan_depth<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>2000<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<ol>\n<li>innodb_io_capactiy \u5728sas 15000\u8f6c\u7684\u4e0b\u914d\u7f6e800\u5c31\u53ef\u4ee5\u4e86\uff0c\u5728ssd\u4e0b\u9762\u914d\u7f6e2000\u4ee5\u4e0a\u3002<\/li>\n<li>\u53ef\u4f7f\u7528\u9ed8\u8ba4\u914d\u7f6e\u3002\u5373\u4e0d\u8bbe\u3002<\/li>\n<\/ol>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u4e3a200\uff0cdb\u541e\u5410\u91cf\u4e0a\u4e0d\u53bb\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_lru_scan_depth = 2000<\/p><\/blockquote>\n<p><b>28)innodb_lock_wait_timeout<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>60<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u6211\u4eec\u4e00\u822c\u4f1a\u78b0\u5230\uff0cmysql innodb_lock_wait_timeout\u8fd9\u4e2a\u9519\uff0c\u8fd9\u4e2a\u9519\u662f\u6162sql\u5bfc\u81f4\uff0c\u5b83\u4ee3\u8868\u7684\u662f\u6162sql\u7684\u4e8b\u52a1\u9501\u8d85\u8fc7\u4e86mysql\u9501\u8d85\u65f6\u7684\u8bbe\u7f6e\u4e86\u3002\u9ed8\u8ba4\u8fd9\u4e2a\u503c\u4e3a\uff1a50s\uff0c\u8fd9\u4e2a\u503c\u662f\u53ef\u4ee5\u52a8\u6001\u6539\u53d8\u7684\uff0c\u6211\u4e0d\u5efa\u8bae\u53bb\u6539\u8fd9\u4e2a\u503c\uff0c\u56e0\u4e3a\u4e00\u4e2asql\u80fd\u8fbe50s\u8fd9\u5f97\u591a\u5938\u5f20\uff1f<\/p>\n<p>\u52a8\u6001\u6539\u53d8\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n<p>SHOW GLOBAL VARIABLES LIKE 'innodb_lock_wait_timeout';<\/p>\n<p>SET GLOBAL innodb_lock_wait_timeout=500;<\/p>\n<p>SHOW GLOBAL VARIABLES LIKE 'innodb_lock_wait_timeout';<\/p>\n<p>\u628a\u5b83\u8bbe\u621060s\u8db3\u591f\u4e86\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u4e3a50s<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_lock_wait_timeout = 60<\/p><\/blockquote>\n<p><b>29)innodb_io_capacity_max<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>8000<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<ol>\n<li>\u8fd9\u4e2a\u503c\u5f88\u91cd\u8981\uff0c\u5b83\u5bf9\u8bfb\u65e0\u6548\uff0c\u5bf9\u5199\u5f88\u6709\u51b3\u5b9a\u610f\u4e49\u3002<\/li>\n<li>\u5b83\u4f1a\u76f4\u63a5\u51b3\u5b9amysql\u7684tps\uff08\u541e\u5410\u6027\u80fd\uff09\uff0c\u8fd9\u8fb9\u7ed9\u51fa\u53c2\u8003\uff1asata\/sas\u786c\u76d8\u8fd9\u4e2a\u503c\u5728200. sas raid10: 2000\uff0cssd\u786c\u76d8\uff1a8000\uff0c fusion-io\uff08\u95ea\u5b58\u5361\uff09\uff1a25,000-50,000<\/li>\n<li>\u672c\u8c03\u4f18\u57fa\u4e8e\u7684\u662fssd\uff0c\u6b64\u503c\u8bbe\u7f6e\u4e3a8000\uff0c\u7b14\u8005\u4e0a\u4e00\u5bb6\u516c\u53f8\u4e92\u8054\u7f51\u91d1\u878d\u662f\u628a\u4e00\u6574\u4e2amysql\u6254\u5230\u4e86\u95ea\u5b58\u5361\u91cc\u7684\uff0c\u56e0\u6b64\u8bbe\u7f6e\u7684\u503c\u4e3a\uff1a50,000.<\/li>\n<li>\u9700\u8981\u6839\u636epaas\u6216\u8005\u662fias\u7684vm\u7684\u786c\u76d8\u6027\u53f7\u6765\u5b9a<\/li>\n<\/ol>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u4e3a200\uff0c\u7cfb\u7edf\u541e\u5410\u4e0a\u4e0d\u53bb\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_io_capacity_max = 8000<\/p><\/blockquote>\n<p><b>30)innodb_io_capacity<\/b><\/p>\n<p>\u5b83\u662fio_capacity_max\u7684\u4e00\u534a\uff0c\u540c\u6837\uff0c\u5b83\u5bf9\u8bfb\u65e0\u6548\u5bf9\u5199\u6709\u51b3\u5b9a\u610f\u4e49\u3002<\/p>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_io_capacity_max = 4000<\/p><\/blockquote>\n<p><b>31)innodb_flush_method<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>O_DIRECT<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u63a8\u8350\u4f7f\u7528O_DIRECT\u3002\u8ba9\u6211\u4eec\u4e00\u8d77\u6765\u7406\u89e3\u4e00\u4e0b\uff0c\u5b83\u67093\u79cd\u6a21\u5f0f\uff1a<\/p>\n<p>1\uff09fdatasync\uff0c\u4e0a\u9762\u6700\u5e38\u63d0\u5230\u7684fsync(int fd)\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u4f5c\u7528\u662fflush\u65f6\u5c06\u4e0efd\u6587\u4ef6\u63cf\u8ff0\u7b26\u6240\u6307\u6587\u4ef6\u6709\u5173\u7684buffer\u5237\u5199\u5230\u78c1\u76d8\uff0c\u5e76\u4e14flush\u5b8c\u5143\u6570\u636e\u4fe1\u606f(\u6bd4\u5982\u4fee\u6539\u65e5\u671f\u3001\u521b\u5efa\u65e5\u671f\u7b49)\u624d\u7b97flush\u6210\u529f\u3002\u5b83\u5bf9\u78c1\u76d8\u7684io\u8bfb\u5199\u4f1a\u5f88\u9891\u7e41<\/p>\n<p>2\uff09O_DIRECT\u5219\u8868\u793a\u6211\u4eec\u7684write\u64cd\u4f5c\u662f\u4ecemysql innodb buffer\u91cc\u76f4\u63a5\u5411\u78c1\u76d8\u4e0a\u5199\uff0c\u5b83\u4f1a\u5145\u5206\u5229\u7528\u7f13\u5b58<\/p>\n<p>3\uff09_DIRECT\u6a21\u5f0f\u7684free\u5185\u5b58\u4e0b\u964d\u6bd4\u8f83\u6162\uff0c\u56e0\u4e3a\u5b83\u662f\u636e\u6587\u4ef6\u7684\u5199\u5165\u64cd\u4f5c\u662f\u76f4\u63a5\u4ecemysql innodb buffer\u5230\u78c1\u76d8\u7684\uff0c\u5e76\u4e0d\u7528\u901a\u8fc7\u64cd\u4f5c\u7cfb\u7edf\u7684\u7f13\u51b2\uff0c\u800c\u771f\u6b63\u7684\u5b8c\u6210\u4e5f\u662f\u5728flush\u8fd9\u6b65,\u65e5\u5fd7\u8fd8\u662f\u8981\u7ecf\u8fc7OS\u7f13\u51b2\uff0cO_DIRECT\u5728SQL\u541e\u5410\u80fd\u529b\u4e0a\u8f83\u597d\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u5b83\u7684\u9ed8\u8ba4\u503c\u4e3afdatasync\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_flush_method = O_DIRECT<\/p><\/blockquote>\n<p><b>32)innodb_file_format<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>Barracuda<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u63a8\u8350\u4f7f\u7528Barracuda\u6a21\u5f0f<\/p>\n<p>\u5b83\u662f\u542f\u7528\u8868\u538b\u7f29\u7528\u7684\uff0c\u5982\uff1a<\/p>\n<p>CREATE TABLE `test_1` (<\/p>\n<p>`x` int(11) DEFAULT NULL<\/p>\n<p>) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=8;<\/p>\n<p>\u5efa\u5b8c\u540e\u53ef\u4ee5\u901a\u8fc7\uff1ashow table status like 'test_1';\u6765\u67e5\u770b\u662f\u5426\u5df2\u7ecf\u542f\u7528\u4e86\u8868\u538b\u7f29\u4e86\u3002<\/p>\n<p>innodb_file_format\u6709\u8fd9\u4e48\u51e0\u79cd\u6a21\u5f0f\uff1a<\/p>\n<p>Antelope-\u7f9a\u7f8a\u6a21\u5f0f\uff0c\u652f\u6301Redundant\uff08\u5197\u4f59\uff09\u3001Compact\uff08\u7d27\u51d1\uff09\u6a21\u5f0f<\/p>\n<p>Barracuda-\u68ad\u5b50\u9c7c,\u662fInnoDB Plugin\u652f\u6301\u7684\u6587\u4ef6\u683c\u5f0f\uff0c\u5728\u539f\u6765\u7684\u57fa\u7840\u4e0a\u65b0\u589e\u4e86\u4e24\u79cd\u6570\u636e\u8868\u683c\u5f0f\u7684\u652f\u6301\uff1aDynamic \u548c Compressed<\/p>\n<p>\u56e0\u6b64\u6211\u63a8\u8350\u4f7f\u7528\uff1aBarracude\u6a21\u5f0f\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u517c\u5bb9\u5176\u5b83\u6570\u636e\u6a21\u5f0f\u3002<\/p>\n<p>\u5b83\u4e5f\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u6539\u53d8\uff1aSET GLOBAL innodb_file_format_max = barracuda;<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u5b83\u9ed8\u8ba4\u4f7f\u7528\u7684\u662f\u53eb\u201c\u8054\u5408\u6a21\u5f0f\u201d\uff0c\u5373\u4e0d\u662f\u68f1\u5b50\u9c7c\u4e5f\u4e0d\u662f\u7f9a\u7f8a\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_file_format = Barracuda<\/p><\/blockquote>\n<p><b>33)innodb_file_format_max<\/b><\/p>\n<p>\u8fd9\u4e2a\u53c2\u6570\u5fc5\u987b\u548cinnodb_file_format\u53c2\u6570\u4e00\u81f4\uff0c\u4e00\u5b9a\u8bb0\u4f4f\uff0c\u8981\u4e0d\u7136\u4e0d\u751f\u6548\u3002<\/p>\n<p><b>34)innodb_log_group_home_dir = \/redolog\/<\/b><\/p>\n<p>\u8fd9\u4e2a\u5c31\u4e0d\u7528\u89e3\u91ca\u4e86\uff0c\u592a\u50bb\u74dc\u4e86\u3002\u8fd9\u79cd\u8def\u5f84\u7684\u90fd\u53ef\u7531\u8fd0\u7ef4\u51b3\u5b9a\uff0c\u8bb0\u5f97\u6302\u5728\u5927\u78c1\u76d8\u4e0b\u3002<\/p>\n<p><b>35)innodb_undo_directory = \/undolog\/<\/b><\/p>\n<p>\u8fd9\u4e2a\u5c31\u4e0d\u7528\u89e3\u91ca\u4e86\uff0c\u592a\u50bb\u74dc\u4e86\u3002\u8fd9\u79cd\u8def\u5f84\u7684\u90fd\u53ef\u7531\u8fd0\u7ef4\u51b3\u5b9a\uff0c\u8bb0\u5f97\u6302\u5728\u5927\u78c1\u76d8\u4e0b\u3002<\/p>\n<p><b>36)innodb_undo_logs = 128<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>128<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u6307\u5b9a\u56de\u6eda\u6bb5\u7684\u4e2a\u6570\uff08\u65e9\u671f\u7248\u672c\u8be5\u53c2\u6570\u540d\u5b57\u662finnodb_rollback_segments\uff09\uff0c\u9ed8\u8ba4128\u4e2a\u3002\u6bcf\u4e2a\u56de\u6eda\u6bb5\u53ef\u540c\u65f6\u652f\u63011024\u4e2a\u5728\u7ebf\u4e8b\u52a1\u3002\u8fd9\u4e9b\u56de\u6eda\u6bb5\u4f1a\u5e73\u5747\u5206\u5e03\u5230\u5404\u4e2aundo\u8868\u7a7a\u95f4\u4e2d\u3002\u8be5\u53d8\u91cf\u53ef\u4ee5\u52a8\u6001\u8c03\u6574\uff0c\u4f46\u662f\u7269\u7406\u4e0a\u7684\u56de\u6eda\u6bb5\u4e0d\u4f1a\u51cf\u5c11\uff0c\u53ea\u662f\u4f1a\u63a7\u5236\u7528\u5230\u7684\u56de\u6eda\u6bb5\u7684\u4e2a\u6570\u3002\u73b0\u5728SSD\u975e\u5e38\u666e\u53ca\u3002innodb_undo_logs\u53ef\u4ee5\u9ed8\u8ba4\u4e3a128\u4e0d\u53d8\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u5c31\u662f128<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_undo_logs = 128<\/p><\/blockquote>\n<p><b>37)innodb_undo_tablespaces<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>3<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u63a8\u8350\uff1a3\uff0c\u9ed8\u8ba4\u4e3a3<\/p>\n<p>\u5b9a\u5355\u72ec\u5b58\u653e\u7684undo\u8868\u7a7a\u95f4\u4e2a\u6570\uff0c\u4f8b\u5982\u5982\u679c\u8bbe\u7f6e\u4e3a3\uff0c\u5219undo\u8868\u7a7a\u95f4\u4e3aundo001\u3001undo002\u3001undo003\uff0c\u6bcf\u4e2a\u6587\u4ef6\u521d\u59cb\u5927\u5c0f\u9ed8\u8ba4\u4e3a10M\u3002\u8be5\u53c2\u6570\u6211\u4eec\u63a8\u8350\u8bbe\u7f6e\u4e3a\u5927\u4e8e\u7b49\u4e8e3\uff0c\u66f4\u591a\u7684\u788e\u7247\u6587\u4ef6\u4f1a\u5f71\u54cd\u78c1\u76d8\u7684io\u6027\u80fd\uff0c\u800c\u4e0d\u591f\u788e\u7247\u540c\u6837\u5f71\u54cdmysql\u7684\u541e\u5410\u7387\uff0c\u5728ssd\u4e0a\u4e00\u822c\u6700\u4f73\u7684\u914d\u7f6e\u57283.\u5982\u679c\u53ea\u67091\u4e2aundo\u8868\u7a7a\u95f4\uff0c\u90a3\u4e48\u6574\u4e2a\u7cfb\u7edf\u5728\u6b64\u8fc7\u7a0b\u4e2d\u5c06\u5904\u4e8e\u4e0d\u53ef\u7528\u72b6\u6001\u3002\u4e3a\u4e86\u5c3d\u53ef\u80fd\u964d\u4f4etruncate\u5bf9\u7cfb\u7edf\u7684\u5f71\u54cd\uff0c\u5efa\u8bae\u5c06\u8be5\u53c2\u6570\u6700\u5c11\u8bbe\u7f6e\u4e3a3\uff1b<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u4e3a\uff1a3<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_undo_tablespaces = 3<\/p><\/blockquote>\n<p><b>38)innodb_flush_neighbors<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>\u63a8\u8350\u4e3a\uff1a0<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u8fd9\u4e2a\u53c2\u6570\u5f88\u8981\u7d27\uff0c\u76ee\u524d\u5728ssd\u76db\u884c\u7684\u60c5\u51b5\u4e0b\u6211\u4eec\u90fd\u628a\u5b83\u8bbe\u4e3a0\uff08\u4e0d\u5f00\u542f\uff09\uff0c\u5982\u679c\u4f60\u8bbe\u7f6e\u6210\u4e861\u5373\u5f00\u542f\uff08\u9ed8\u8ba4\u72b6\u6001\uff09InnoDB\u5c31\u4f1a\u5237\u65b0\u4e00\u4e2aextent\u4e2d\u7684\u6240\u6709\u9875\u9762\uff0c\u56e0\u4e3aSSD\u5728\u968f\u673aIO\u4e0a\u6ca1\u6709\u989d\u5916\u8d1f\u8f7d\uff0c\u6240\u4ee5\u4e0d\u9700\u8981\u542f\u7528\u8be5\u7279\u6027\uff0c\u5f00\u542f\u4e86\u53cd\u800c\u591a\u6b64\u4e00\u53e5\u3002\u4e0b\u9762\u7ed9\u51fa\u4e00\u6bb5mysql5.7\u6e90\u7801\u7f16\u8bd1\u524d\u7a0b\u5e8f\u5458\u770b\u7684readme\u91cc\u7684\u4e00\u53e5\u8bdd\uff1a<\/p>\n<blockquote><p>This new default changes MySQL to cater for SSDs and fast storage devices by default. We expect that for the majority of users, this will result in a small performance gain. Users who are using slower hard drives may see a performance loss, and are encouraged to revert to the previous defaults by setting innodb_flush_neighbors=1.<\/p><\/blockquote>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u5b83\u7684\u9ed8\u8ba4\u662f1\uff0c\u4e0d\u662f0.\u8fd9\u4e2a\u53c2\u6570\u5bf9\u673a\u6027\u786c\u76d8\u6765\u8bf4\u5f88\u6709\u6548\uff0c\u53ef\u4ee5\u51cf\u5c11\u968f\u673aio\uff0c\u589e\u52a0\u6027\u80fd\u3002\u5982\u679c\u662fssd\u7c7b\u78c1\u76d8\uff0c\u5efa\u8bae\u8bbe\u7f6e\u4e3a0\uff0c\u53ef\u4ee5\u66f4\u5feb\u7684\u5237\u65b0\u810f\u9875\u3002\u5982\u679c\u4f60\u628a\u5b83\u8bbe\u4e3a1\u540c\u65f6\u53c8\u662fssd\u90a3\u5c31\u663e\u5f97\u6ca1\u5fc5\u8981\u4e86\u3002\u8fd9\u8fb9\u666e\u53ca\u4e00\u4e0b\u5c0f\u77e5\u8bc6\uff0c\u5982\u679c\u4f60\u88c5\u8fc78.0\uff0c\u4f60\u53ef\u4ee5\u53bb\u770b\u4e00\u4e0b\uff0c8.0\u5df2\u7ecf\u628a\u8fd9\u4e2a\u9ed8\u8ba4\u503c\u8bbe\u4e3a0\u4e86\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_flush_neighbors = 0<\/p><\/blockquote>\n<p><b>39)innodb_log_file_size<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>\u7b2c1\u6b65\uff1ashow engine innodb status;<\/p>\n<p>\u5f97\u5230\uff1a<\/p>\n<p>Log sequence number 2944118284<\/p>\n<p>Log flushed up to 2944118283<\/p>\n<p>Last checkpoint at 2724318261<\/p>\n<p>\u7b2c2\u6b65\uff1a\u8bbeinnodb_log_file_size$=log Log sequence number-last checkpoint at=select (2944118284-2724318261)\/1024\/1024;=209M<\/p>\n<p>\u7b2c3\u6b65\uff1a\u8bbe\u771f\u6b63\u7684innodb_log_file_size&lt;=(innodb_log_files_in_group*innodb_log_file_size)*0.75,innodb_log_files_in_group\u4e3a2\uff08\u9ed8\u8ba4\uff09\uff0c\u5f97\uff1a<\/p>\n<p>\u7b2c4\u6b65\uff1aselect 209\/(2*0.75);=139.33\u5373\uff1a139m\uff0c\u6b64\u65f6\u53ef\u628a\u8fd9\u4e2a\u503c\u8bbe\u4e3a140M<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u8fd9\u4e2a\u503c\u7684\u9ed8\u8ba4\u4e3a5M\uff0c\u662f\u8fdc\u8fdc\u4e0d\u591f\u7684\uff0c\u5728\u5b89\u88c5\u5b8cmysql\u65f6\u9700\u8981\u5c3d\u5feb\u7684\u4fee\u6539\u8fd9\u4e2a\u503c\u3002<\/p>\n<p>\u5982\u679c\u5bf9 Innodb \u6570\u636e\u8868\u6709\u5927\u91cf\u7684\u5199\u5165\u64cd\u4f5c\uff0c\u90a3\u4e48\u9009\u62e9\u5408\u9002\u7684 innodb_log_file_size \u503c\u5bf9\u63d0\u5347MySQL\u6027\u80fd\u5f88\u91cd\u8981\u3002\u7136\u800c\u8bbe\u7f6e\u592a\u5927\u4e86\uff0c\u5c31\u4f1a\u589e\u52a0\u6062\u590d\u7684\u65f6\u95f4\uff0c\u56e0\u6b64\u5728MySQL\u5d29\u6e83\u6216\u8005\u7a81\u7136\u65ad\u7535\u7b49\u60c5\u51b5\u4f1a\u4ee4MySQL\u670d\u52a1\u5668\u82b1\u5f88\u957f\u65f6\u95f4\u6765\u6062\u590d\u3002<\/p>\n<p>\u800c\u8fd9\u4e2a\u503c\u662f\u6ca1\u6709\u4e00\u4e2a\u7edd\u5bf9\u7684\u6982\u5ff5\u7684\uff0cMySQL\u7684InnoDB \u5b58\u50a8\u5f15\u64ce\u4f7f\u7528\u4e00\u4e2a\u6307\u5b9a\u5927\u5c0f\u7684Redo log\u7a7a\u95f4\uff08\u4e00\u4e2a\u73af\u5f62\u7684\u6570\u636e\u7ed3\u6784\uff09\u3002Redo log\u7684\u7a7a\u95f4\u901a\u8fc7innodb_log_file_size\u548cinnodb_log_files_in_group\uff08\u9ed8\u8ba42\uff09\u53c2\u6570\u6765\u8c03\u8282\u3002\u5c06\u8fd9\u4fe9\u53c2\u6570\u76f8\u4e58\u5373\u53ef\u5f97\u5230\u603b\u7684\u53ef\u7528Redo log \u7a7a\u95f4\u3002\u5c3d\u7ba1\u6280\u672f\u4e0a\u5e76\u4e0d\u5173\u5fc3\u4f60\u662f\u901a\u8fc7innodb_log_file_size\u8fd8\u662finnodb_log_files_in_group\u6765\u8c03\u6574Redo log\u7a7a\u95f4\uff0c\u4e0d\u8fc7\u591a\u6570\u60c5\u51b5\u4e0b\u8fd8\u662f\u901a\u8fc7innodb_log_file_size \u6765\u8c03\u8282\u3002\u4e3aInnoDB\u5f15\u64ce\u8bbe\u7f6e\u5408\u9002\u7684Redo log\u7a7a\u95f4\u5bf9\u4e8e\u5199\u654f\u611f\u7684\u5de5\u4f5c\u8d1f\u8f7d\u6765\u8bf4\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u7136\u800c\uff0c\u8fd9\u9879\u5de5\u4f5c\u662f\u8981\u505a\u51fa\u6743\u8861\u7684\u3002\u4f60\u914d\u7f6e\u7684Redo\u7a7a\u95f4\u8d8a\u5927\uff0cInnoDB\u5c31\u80fd\u66f4\u597d\u7684\u4f18\u5316\u5199\u64cd\u4f5c\uff1b\u7136\u800c\uff0c\u589e\u5927Redo\u7a7a\u95f4\u4e5f\u610f\u5473\u7740\u66f4\u957f\u7684\u6062\u590d\u65f6\u95f4\u5f53\u51fa\u73b0\u5d29\u6e83\u6216\u6389\u7535\u7b49\u610f\u5916\u65f6\u3002\u6211\u4eec\u662f\u901a\u8fc7\u201c\u6d4b\u8bd5\u201d\u5f97\u5230\uff0c\u600e\u4e48\u6d4b\u8bd5\u4e0b\u9762\u7ed9\u51fa\u65b9\u6cd5\u8bba\uff1a\u4e00\u822c\u60c5\u51b5\u4e0b\u6211\u4eec\u53ef\u4ee5\u6309\u7167\u6bcf1GB\u7684Redo log\u7684\u6062\u590d\u65f6\u95f4\u5927\u7ea6\u57285\u5206\u949f\u5de6\u53f3\u6765\u4f30\u7b97\u3002\u5982\u679c\u6062\u590d\u65f6\u95f4\u5bf9\u4e8e\u4f60\u7684\u4f7f\u7528\u73af\u5883\u6765\u8bf4\u5f88\u91cd\u8981\uff0c\u6211\u5efa\u8bae\u4f60\u505a\u4e00\u4e9b\u6a21\u62df\u6d4b\u8bd5\uff0c\u5728\u6b63\u5e38\u5de5\u4f5c\u8d1f\u8f7d\u4e0b\uff08\u9884\u70ed\u5b8c\u6bd5\u540e\uff09\u6a21\u62df\u7cfb\u7edf\u5d29\u6e83\uff0c\u6765\u8bc4\u4f30\u66f4\u51c6\u786e\u7684\u6062\u590d\u65f6\u95f4\u3002\u4f60\u53ef\u4ee5\u5b89\u88c5 Percona Monitoring and Management\uff0c\u5728\u8be5pmm\u7684percona monitoring and management\u56fe\u8868\u4e2d\uff0c\u4e3b\u8981\u770b\uff1a<\/p>\n<p>1\uff09Uncheckpointed Bytes \uff0c\u5982\u679c\u5b83\u5df2\u7ecf\u975e\u5e38\u63a5\u8fd1 Max Checkpoint Age\uff0c\u90a3\u4e48\u4f60\u51e0\u4e4e\u53ef\u4ee5\u786e\u5b9a\u5f53\u524d\u7684 innodb_log_file_size \u503c\u56e0\u4e3a\u592a\u5c0f\u5df2\u7ecf\u67d0\u79cd\u7a0b\u5ea6\u4e0a\u9650\u5236\u4e86\u7cfb\u7edf\u6027\u80fd\u3002\u589e\u52a0\u8be5\u503c\u53ef\u4ee5\u8f83\u4e3a\u663e\u8457\u7684\u63d0\u5347\u7cfb\u7edf\u6027\u80fd\u3002<\/p>\n<p>2\uff09Uncheckpointed Bytes \u8fdc\u5c0f\u4e8e Max Checkpoint Age\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u518d\u589e\u52a0 innodb_log_file_size \u5c31\u4e0d\u4f1a\u6709\u660e\u663e\u6027\u80fd\u63d0\u5347\u3002<\/p>\n<p>\u5728\u8c03\u6574\u5b8clog_file_size\u540e\u6211\u4eec\u518d\u5230pmm\u4e2d\u53bb\u770b\uff1aRedo Log\u7a7a\u95f4\u6307\u6807\uff0c\u6bd4\u5982\u8bf4\u6211\u4eec\u770b\u5230\u4e861\u5c0f\u65f6\u5185\u670960g\u6570\u636e\u88ab\u5199\u5165\u65e5\u5fd7\u6587\u4ef6\uff0c\u5dee\u4e0d\u591a\u5c31\u662f\u6bcf10\u5206\u949f\u4f1a\u670910g\u6570\u636e\u5728\u8fdb\u884c\u201c\u5199\u65e5\u5fd7\u201c\uff0c\u6211\u4eec\u9700\u8981\u7262\u7262\u8bb0\u5f97\uff0c\u8fd9\u4e2a\u201d\u5199\u65e5\u65e5\u571f\u5df2\u201c\u7684\u65f6\u95f4\u62d6\u5f97\u8d8a\u4e45\u3001\u51fa\u73b0\u7684\u9891\u6b21\u8d8a\u5c11\u5c31\u8d8a\u6709\u52a9\u4e8emysql\u7684innodb\u7684\u6027\u80fd\u3002\u56e0\u6b64\u8fd9\u4e2a\u503c\u6ca1\u6709\u7edd\u5bf9\u63a8\u8350\u3002\u5982\u679c\u4f60\u6ca1\u6709pmm\uff0c\u90a3\u4e48\u6211\u4eec\u6765\u4eba\u8089\u7b97\uff0c\u5728\u4e0a\u9762\u6211\u5df2\u7ecf\u7ed9\u51fa\u4e86\u4eba\u8089\u7b97\u7684\u8be6\u7ec6\u4f8b\u5b50\uff01<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u662f5M\uff0c\u8fd9\u662f\u80af\u5b9a\u4e0d\u591f\u7684\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_log_file_size = 140M<\/p><\/blockquote>\n<p><b>40)innodb_log_buffer_size<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>16777216<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<ol>\n<li>\u5bf9\u4e8e\u8f83\u5c0f\u7684innodb_buffer_pool_size\uff0c\u6211\u4eec\u4f1a\u628a\u5b83\u8bbe\u6210\u548cinnodb_buffer_pool_size\u4e00\u6837\u3002<\/li>\n<li>\u800c\u5f53\u8d85\u8fc74gb\u7684innodb_buffer_pool_size\u65f6\uff0c\u6211\u4eec\u7684\u5efa\u8bae\u662f\u628a\u5b83\u5207\u7684\u591f\u788e\uff0c\u8fd9\u662fmysql5.7\u91cc\u65b0\u5e26\u7684\u7279\u6027\uff0c\u5b83\u7684\u9ed8\u8ba4\u57288m\uff0c\u4f46\u662f\u5bf9\u4e8e\u5927\u91cf\u6709\u4e8b\u52a1\u64cd\u4f5c\u7684mysql\u6211\u4eec\u63a8\u8350\u5728\u5199\u64cd\u4f5c\u5e93\u4e0a\u8bbe\u7f6e\uff1a16m<\/li>\n<li>\u6b64\u53c2\u6570\u786e\u5b9a\u4e9b\u65e5\u5fd7\u6587\u4ef6\u6240\u7528\u7684\u5185\u5b58\u5927\u5c0f\uff0c\u4ee5M\u4e3a\u5355\u4f4d\u3002\u7f13\u51b2\u533a\u66f4\u5927\u80fd\u63d0\u9ad8\u6027\u80fd\uff0c\u4f46\u610f\u5916\u7684\u6545\u969c\u5c06\u4f1a\u4e22\u5931\u6570\u636e.\u5b98\u65b9\u7684\u65b9\u6863\u5efa\u8bae\u8bbe\u7f6e\u4e3a1\uff0d8M\u4e4b\u95f4\uff01<\/li>\n<\/ol>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u662f8M<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_log_buffer_size = 16777216<\/p><\/blockquote>\n<p><b>41)innodb_purge_threads<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>0<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u8fd9\u4e2a\u53c2\u6570\u8f7b\u6613\u4e0d\u7528\u7684\uff0c\u6211\u63a8\u8350\u5b83\u8bbe\u4e3a\uff1a0\uff0c\u4e3a\u4ec0\u4e48\u5462\uff1f\u8fd9\u4e2a\u53c2\u6570\u662f\u548cinnodb_force_recovery\u5173\u8054\u8d77\u6765\u7684\uff0c\u53ea\u6709\u5f53\u6570\u636e\u5e93\u5d29\u6e83\u540e\u91cd\u542f\u65f6\u624d\u4f1a\u4e34\u65f6\u53bb\u8bbe\u7684\u3002\u5b83\u7684\u4f7f\u7528\u573a\u666f\u5982\u4e0b\uff1a<\/p>\n<p>mysql\u65ad\u7535\uff0c\u91cd\u542f\u540e\u65e0\u6548\uff0c\u8d77\u4e0d\u6765\u3002\u6240\u4ee5\u6211\u4eec\u6839\u636einnodb_force_recovery\u7684\u53c2\u6570\uff1a<\/p>\n<p>1. (SRV_FORCE_IGNORE_CORRUPT):\u5ffd\u7565\u68c0\u67e5\u5230\u7684corrupt\u9875\u3002<\/p>\n<p>2. (SRV_FORCE_NO_BACKGROUND):\u963b\u6b62\u4e3b\u7ebf\u7a0b\u7684\u8fd0\u884c\uff0c\u5982\u4e3b\u7ebf\u7a0b\u9700\u8981\u6267\u884cfull purge\u64cd\u4f5c\uff0c\u4f1a\u5bfc\u81f4crash\u3002<\/p>\n<p>3. (SRV_FORCE_NO_TRX_UNDO):\u4e0d\u6267\u884c\u4e8b\u52a1\u56de\u6eda\u64cd\u4f5c\u3002<\/p>\n<p>4. (SRV_FORCE_NO_IBUF_MERGE):\u4e0d\u6267\u884c\u63d2\u5165\u7f13\u51b2\u7684\u5408\u5e76\u64cd\u4f5c\u3002<\/p>\n<p>5. (SRV_FORCE_NO_UNDO_LOG_SCAN):\u4e0d\u67e5\u770b\u91cd\u505a\u65e5\u5fd7\uff0cInnoDB\u5b58\u50a8\u5f15\u64ce\u4f1a\u5c06\u672a\u63d0\u4ea4\u7684\u4e8b\u52a1\u89c6\u4e3a\u5df2\u63d0\u4ea4\u3002<\/p>\n<p>6. (SRV_FORCE_NO_LOG_REDO):\u4e0d\u6267\u884c\u524d\u6eda\u7684\u64cd\u4f5c\u3002<\/p>\n<p>\u6211\u4eec\u5728my.cnf\u4e2d\u5982\u4e0b\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>innodb_force_recovery = 6<\/p>\n<p>innodb_purge_threads = 0<\/p><\/blockquote>\n<p>\u8bb0\u4f4f\uff0c\u4e00\u65e6\u5f53innodb_force_recovery&gt;2\u65f6\uff0c\u8981\u628ainnodb_purge_threads\u8bbe\u62100.<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u4e0d\u8981\u53bb\u8bbe\uff0c\u53ef\u4ee5\u4e0d\u914d\uff0c\u51fa\u73b0\u4e86\u95ee\u9898\u5728recover\u9700\u8981\u65f6\u518d\u53bb\u6539\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_purge_threads = 0<\/p><\/blockquote>\n<p><b>42)innodb_large_prefix<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>1<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<ol>\n<li>\u5982\u679c\u4f60\u7684\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u7aef\u7684\u5b57\u7b26\u96c6\u8bbe\u6210\u4e86utf8mb4\uff0c\u90a3\u4e48\u6211\u4eec\u9700\u8981\u628a\u8fd9\u4e2a\u5f00\u5173\u5f00\u542f\uff0c\u4e3a\u4ec0\u4e48\u5462\uff1fmysql\u57285.6\u4e4b\u524d\u4e00\u76f4\u90fd\u662f\u5355\u5217\u7d22\u5f15\u9650\u5236767\uff0c\u8d77\u56e0\u662f256\u00d73-1\u3002\u8fd9\u4e2a3\u662f\u5b57\u7b26\u6700\u5927\u5360\u7528\u7a7a\u95f4\uff08utf8\uff09\u3002\u4f46\u662f\u57285.6\u4ee5\u540e\uff0c\u5f00\u59cb\u652f\u63014\u4e2a\u5b57\u8282\u7684uutf8\u3002255\u00d74&gt;767, \u4e8e\u662f\u589e\u52a0\u4e86\u8fd9\u4e2a\u53c2\u6570\u3002\u8fd9\u4e2a\u53c2\u6570\u9ed8\u8ba4\u503c\u662fOFF\u3002\u5f53\u6539\u4e3aON\u65f6\uff0c\u5141\u8bb8\u5217\u7d22\u5f15\u6700\u5927\u8fbe\u52303072.<\/li>\n<li>\u5728mysql5.6\u4e2d\u8fd9\u4e2a\u5f00\u5173\u53ebon, off\u3002\u800c\u57285.7\u4e2d\u53eb0\u548c1\uff0c\u7531\u4e8e\u6211\u4eec\u524d\u9762\u8bbe\u7f6e\u4e86utf8mb4\uff0c\u56e0\u6b64\u8fd9\u8fb9\u6211\u4eec\u5fc5\u987b\u628a\u8fd9\u4e2a\u53c2\u6570\u5f00\u542f\u3002<\/li>\n<\/ol>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u4e0d\u914d\u4f1a\u6709\u95ee\u9898\uff0c\u7279\u522b\u662f\u7d22\u5f15\u4f1a\u65e0\u6548\u3001\u6216\u8005\u4e0d\u662f\u8d70\u6700\u4f18\u8ba1\u5212\uff0c\u5982\u679c\u4f60\u7684\u5b57\u7b26\u96c6\u662futf8mb4\uff0c\u90a3\u4e48\u8fd9\u4e2a\u503c\u5fc5\u5f00\u542f\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_large_prefix = 1<\/p><\/blockquote>\n<p><b>43)innodb_thread_concurrency<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>\u88c5mysql\u7684\u670d\u52a1\u5668\u7684cpu\u7684\u6838\u6570<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u5982\uff1a64\u6838cpu\uff0c\u90a3\u4e48\u63a8\u8350\uff1a64\uff08&lt;=cpu\u6838\u6570\uff09<\/p>\n<p>\u5982\u679c\u4e00\u4e2a\u5de5\u4f5c\u8d1f\u8f7d\u4e2d\uff0c\u5e76\u53d1\u7528\u6237\u7ebf\u7a0b\u7684\u6570\u91cf\u5c0f\u4e8e\u7b49\u4e8e64\uff0c\u5efa\u8bae\u8bbe\u7f6einnodb_thread_concurrency=0;\u800c\u4e8b\u5b9e\u4e0a\u6211\u4eec\u7684\u7cfb\u7edf\u662f\u5904\u4e8e\u5927\u5e76\u53d1\u5927\u4e8b\u52a1\u7684\u60c5\u51b5\u4e0b\u7684\uff0c\u600e\u4e48\u6765\u7b97\u8fd9\u4e2a\u503c\uff1f\u5efa\u8bae\u662f\u5148\u8bbe\u7f6e\u4e3a128\uff0c\u7136\u540e\u6211\u4eec\u4e0d\u65ad\u7684\u964d\u8fd9\u4e2a\u503c\uff0c\u76f4\u5230\u53d1\u73b0\u80fd\u591f\u63d0\u4f9b\u6700\u4f73\u6027\u80fd\u7684\u7ebf\u7a0b\u6570\u3002\u4e3a\u4e86\u5b89\u5168\u8d77\u95f4\u6211\u4eec\u4f1a\u628a\u5b83\u8bbe\u6210\u548ccpu\u4e00\u6837\u5927\u5c0f\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u572864\u4f4d\u4e0b\u4f1a\u662f8<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_thread_concurrency = 64<\/p><\/blockquote>\n<p><b>44)innodb_print_all_deadlocks<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>1<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u63a8\u8350\uff1a1<\/p>\n<p>\u5f53mysql \u6570\u636e\u5e93\u53d1\u751f\u6b7b\u9501\u65f6\uff0c innodb status \u91cc\u9762\u4f1a\u8bb0\u5f55\u6700\u540e\u4e00\u6b21\u6b7b\u9501\u7684\u76f8\u5173\u4fe1\u606f\uff0c\u4f46mysql \u9519\u8bef\u65e5\u5fd7\u91cc\u9762\u4e0d\u4f1a\u8bb0\u5f55\u6b7b\u9501\u76f8\u5173\u4fe1\u606f\uff0c\u8981\u60f3\u8bb0\u5f55\uff0c\u542f\u52a8 innodb_print_all_deadlocks \u53c2\u6570 \u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<p>\u4e0d\u4f1a\u8bb0\u5f55\u8be5\u4fe1\u606f\u3002<\/p>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_print_all_deadlocks = 1<\/p><\/blockquote>\n<p><b>45)innodb_strict_mode<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>1<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u5fc5\u987b\u5f00\u542f\uff0c\u6ca1\u5f97\u9009\u62e9\uff0c1\uff0c\u4e3a\u4ec0\u4e48\uff1f<\/p>\n<p>\u4eceMySQL5.5.X\u7248\u672c\u5f00\u59cb\uff0c\u4f60\u53ef\u4ee5\u5f00\u542fInnoDB\u4e25\u683c\u68c0\u67e5\u6a21\u5f0f\uff0c\u5c24\u5176\u91c7\u7528\u4e86\u9875\u6570\u636e\u538b\u7f29\u529f\u80fd\u540e\uff0c\u6700\u597d\u662f\u5f00\u542f\u8be5\u529f\u80fd\u3002\u5f00\u542f\u6b64\u529f\u80fd\u540e\uff0c\u5f53\u521b\u5efa\u8868\uff08CREATE TABLE\uff09\u3001\u66f4\u6539\u8868\uff08ALTER TABLE\uff09\u548c\u521b\u5efa\u7d22\u5f15\uff08CREATE INDEX\uff09\u8bed\u53e5\u65f6\uff0c\u5982\u679c\u5199\u6cd5\u6709\u9519\u8bef\uff0c\u4e0d\u4f1a\u6709\u8b66\u544a\u4fe1\u606f\uff0c\u800c\u662f\u76f4\u63a5\u629b\u51fa\u9519\u8bef\uff0c\u8fd9\u6837\u5c31\u53ef\u76f4\u63a5\u5c06\u95ee\u9898\u627c\u6740\u5728\u6447\u7bee\u91cc\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u5982\u679c\u4e0d\u914d\u78b0\u5230\u5f00\u53d1\u6216\u8005\u975e\u4e13\u4e1a\u7684dba\u4f1a\u628a\u65e7ddl\u8bed\u53e5\u751f\u6548\u57285.7\u5185\uff0c\u53e6\u5916\u4e00\u4e2a\u95ee\u9898\u5c31\u662fddl\u8bed\u53e5\u51fa\u9519\u65f6\u62a5\u9519\u4e0d\u660e\u663e\uff0c\u8fd9\u4f1a\u5f71\u54cd\u5230\u201c\u4e3b\u4ece\u590d\u5236\u201d\uff0c\u81f3\u4e8edll\u4e3a\u4ec0\u4e48\u4f1a\u5f71\u54cd\u5230\u4e3b\u4ece\u590d\u5236\uff0c\u6211\u4eec\u540e\u9762\u4f1a\u5728\u201cslave_skip_errors = ddl_exist_errors\u201d\u4e2d\u8be6\u7ec6\u89e3\u8bf4\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_strict_mode = 1<\/p><\/blockquote>\n<p><b>46)log_error<\/b><\/p>\n<p>error log\u6240\u5728\u4f4d\u7f6e\uff0c\u8fd9\u4e2a\u4e0d\u7528\u591a\u8bb2\uff0c\u53ef\u4ee5\u548cmysql log\u653e\u5728\u540c\u4e00\u8def\u5f84\u4e0b\uff0c\u6587\u4ef6\u540d\u80fd\u591f\u548c\u5176\u5b83log\u533a\u5206\u5f00\u6765\u3002<\/p>\n<p><b>47)slow_query_log<\/b><\/p>\n<p>\u5efa\u8bae\u5f00\u542f<\/p>\n<p><b>48)slow_query_log_file<\/b><\/p>\n<p>\u6162sql\u6240\u5728\u4f4d\u7f6e\uff0c\u8fd9\u4e2a\u4e0d\u7528\u591a\u8bb2\uff0c\u53ef\u4ee5\u548cmysql log\u653e\u5728\u540c\u4e00\u8def\u5f84\u4e0b\uff0c\u6587\u4ef6\u540d\u80fd\u591f\u548c\u5176\u5b83log\u533a\u5206\u5f00\u6765\u3002<\/p>\n<p><b>49)log_queries_not_using_indexes=1<\/b><\/p>\n<p>\u5f3a\u70c8\u5efa\u8bae\u5f00\u542f\u62101.<\/p>\n<p><b>50)log_slow_admin_statements = 1<\/b><\/p>\n<p>\u5f3a\u70c8\u5efa\u8bae\u5f00\u542f\u62101.<\/p>\n<p><b>51)log_slow_slave_statements = 1<\/b><\/p>\n<p>\u5f3a\u70c8\u5efa\u8bae\u5f00\u542f\u62101.<\/p>\n<p><b>52)log_throttle_queries_not_using_indexes<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>\u5728\u4e00\u5f00\u59cb\u4e0a\u7ebf\u540e\u7684\u521d\u671f\u6211\u4eec\u4f1a\u5f00\u621030\uff5e50\u6761\u3002\u968f\u7740\u6027\u80fd\u9010\u6e10\u4f18\u5316\u6211\u4eec\u4f1a\u628a\u8fd9\u4e2a\u6570\u91cf\u5f00\u621010.<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u4e0a\u7ebf\u524d\u4e00\u6bb5\u65f6\u95f4\u4f1a\u4e0d\u592a\u7a33\u5b9a\uff0c\u6211\u4eec\u53d1\u751f\u8fc7\u8fd1\u51e0\u5341\u6761sql\u6ca1\u6709\u8d70index<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u4e0d\u914d\u4e0d\u5f00\u542f\uff0c\u5efa\u8bae\u5f00\u542f\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>log_throttle_queries_not_using_indexes = 50<\/p><\/blockquote>\n<p><b>53)expire_logs_days<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<p><b>30<\/b><\/p>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u8fd9\u4e2a\u503c\u4e0d\u80fd\u592a\u5927\uff0c\u56e0\u4e3a\u4f60\u4e0d\u662f\u571f\u8c6a\uff0c\u4e0d\u80fd\u8ba9binlog\u65e0\u9650\u5360\u7528\u4f60\u7684\u78c1\u76d8\u7a7a\u95f4\uff0c\u8bb0\u5f97\u8fd9\u4e2a\u503c\u4e00\u65e6\u8bbe\u5c0f\uff0c\u4f60\u9700\u8981\u505a\u597dbinlog\u5907\u4efd\u7b56\u7565\uff0c30\u8fd9\u4e2a\u503c\u5c31\u662f30\u5929\uff0c\u524d\u63d0\u662f\u4f60\u7684binlog\u7684\u5907\u4efd\u505a\u7684\u6709\u6548\u4e14\u4e0d\u5360\u7528mysql\u7684\u78c1\u76d8\u7a7a\u95f4\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u662f0\uff0c\u5373\u6c38\u4e0d\u8fc7\u671f\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>expire_logs_days = 30<\/p><\/blockquote>\n<p><b>54)long_query_time<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>10<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u9ed8\u8ba4\u4e3a10\u79d2\u79cd\uff0c\u5373\u4e00\u5207&gt;=10s\u7684sql\u90fd\u4f1a\u88ab\u8bb0\u5f55\u3002\u6211\u5efa\u8bae\u5728\u5f00\u59cb\u521a\u4e0a\u7ebf\u671f\u8bbe\u621010\uff08\u7528\u9ed8\u8ba4\u503c\uff09\uff0c\u8d8a\u7740\u6162sql\u8c03\u4f18\u8d8a\u6765\u8d8a\u597d\uff0c\u53ef\u4ee5\u628a\u8fd9\u4e2a\u503c\u8bbe\u62101.\u56e0\u4e3a\u79d2\u6570\u8d8a\u4f4e\uff0c\u8bb0\u5f55\u7684sql\u8d8a\u591a\uff0c\u8bb0\u5f55\u8d8a\u591a\uff0c\u4e5f\u4f1a\u9020\u6210mysql\u8fc7\u6162\u3002\u53e6\u5916\u4e0d\u80fd\u5b8c\u5168\u4f9d\u8d56\u4e8emysql\u7684\u6162sql log\uff0c\u800c\u662f\u5e94\u8be5\u5e03\u7f72druid sql\u5b9e\u65f6\u67e5\u770b\u5668\u6216\u8005\u662fapm\u6216\u8005\u662f\u4e13\u4e1a\u7684\u6162sql\u5b9e\u65f6\u67e5\u8be2\u5668\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u4e3a10<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>long_query_time = 10<\/p><\/blockquote>\n<p><b>55)min_examined_row_limit<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>100<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u8fd9\u4e2a\u503c\u914d\u5408\u7740\u6162\u67e5\u8be2sql\u8bb0\u5f55\u7528\uff0c\u6307\u5b9a\u4e3a\u5c11\u4e8e\u8be5\u503c\u7684\u884c\u7684\u67e5\u8be2\u5c31\u7b97\u6162sql\u4e0d\u88ab\u8bb0\u5f55\u6210\u201d\u6162sql\u65e5\u5fd7\u201c\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u4e0d\u5f00\u542f\u7684\u8bdd\u4ee5\u6162sql\u7684long_query_time\u4e3a\u4f18\u5148\u89c4\u5219\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>min_examined_row_limit = 100<\/p><\/blockquote>\n<p><b>56)master_info_repository<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>TABLE<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<ol>\n<li>\u4e3b\u4ece\u590d\u5236\u65f6\u7528\uff0c\u63a8\u8350TABLE.<\/li>\n<li>\u4ece\u673a\u4fdd\u5b58\u4e3b\u8282\u70b9\u4fe1\u606f\u65b9\u5f0f\uff0c\u8bbe\u6210file\u65f6 \u4f1a\u751f\u6210master.info \u548c relay-log.info2\u4e2a\u6587\u4ef6\uff0c\u8bbe\u6210table\uff0c\u4fe1\u606f\u5c31\u4f1a\u5b58\u5728mysql.master_slave_info\u8868\u4e2d\u3002\u4e0d\u7ba1\u662f\u8bbe\u7f6e\u7684\u54ea\u79cd\u503c\uff0c\u90fd\u4e0d\u8981\u79fb\u52a8\u6216\u8005\u7f16\u8f91\u76f8\u5173\u7684\u6587\u4ef6\u548c\u8868\u3002<\/li>\n<\/ol>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u4e0d\u914d\u7684\u8bdd\u9ed8\u8ba4\u5b58\u6210file\u683c\u5f0f\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>master_info_repository = TABLE<\/p><\/blockquote>\n<p><b>57)relay_log_info_repository<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>TABLE<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<blockquote><p>\u4e3b\u4ece\u590d\u5236\u65f6\u7528\uff0c\u63a8\u8350TABLE.<\/p>\n<p>\u8fd9\u4e2a\u53c2\u6570\u548c\u4e0a\u9762\u7684master_info_repository\u5fc5\u987b\u4fdd\u6301\u4e00\u81f4\uff0c\u8981\u4e0d\u7136mysql\u5b9e\u4f8b\u542f\u4e0d\u8d77\u6765\u3002<\/p>\n<p>\u4e0d\u8fc7\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8fd9\u51e0\u4e2atable\u9ed8\u8ba4\u7528\u7684\u662fmyIsAM\u5f15\u64ce\uff0c\u8981\u5f00\u542f\u6210TABLE\u6a21\u5f0f\u7684\u8bdd\u4e00\u5b9a\u8bb0\u5f97\u628a\u8fd9\u4e24\u4e2a\u8868\u7684\u5f15\u64ce\u6539\u6210innodb<\/p><\/blockquote>\n<pre class=\"hljs bash\"><code class=\"hljs bash copyable\" lang=\"bash\">alter table slave_master_info engine=innodb;alter table slave_relay_log_info engine=innodb;alter table slave_worker_info engine=innodb;<span class=\"copy-code-btn\">\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u8fd9\u4e2a\u53c2\u6570\u548c\u4e0a\u9762\u7684master_info_repository\u5fc5\u987b\u4fdd\u6301\u4e00\u81f4\uff0c\u8981\u4e0d\u7136mysql\u5b9e\u4f8b\u542f\u4e0d\u8d77\u6765<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>relay_log_info_repository = TABLE<\/p><\/blockquote>\n<p><b>58)log_bin = bin.log<\/b><\/p>\n<p>\u4e3b\u4ece\u590d\u5236\u65f6\u7528\uff0c\u4e3b\u4ece\u590d\u5236\u4e0b\u7684bin.log\u65e5\u5fd7\u6240\u5728\u6587\u4ef6\u5939\u3002<\/p>\n<p><b>59)sync_binlog<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>1<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u4e3b\u4ece\u590d\u5236\u65f6\u7528\uff0c\u8fd9\u4e2a\u503c\u662f\u8981\u770b\u4e1a\u52a1\u7684\uff0c\u5b83\u53ef\u4ee5\u67090\uff0c1\uff0c\u975e\u96f6\u51713\u79cd\u8bbe\u7f6e\u65b9\u5f0f\u3002<\/p>\n<p>1\uff090-\u4ee3\u8868mysql\u4e0d\u63a7\u5236\u5199binlog\u7684\u65f6\u95f4\uff0c\u7531file system\u81ea\u7531\u53bb\u63a7\u5236\uff0c\u6b64\u65f6\u7684mysql\u7684\u5e76\u53d1\u6027\u8fbe\u5230\u6700\u597d\uff0c\u4f46\u662f\u4e00\u65e6\u7cfb\u7edf\u5d29\u6e83\u4f60\u4f1a\u4e22\u5931\u5f88\u591a\u8fd8\u4f1a\u5199\u5165binlog\u7684\u6570\u636e\uff08\u6bd4\u5982\u8bf4\u4f60\u6b63\u5728\u5220\u6570\u636e\u548c\u66f4\u65b0\u6570\u636e\uff09<\/p>\n<p>2\uff091-\u6700\u5b89\u5168\uff0c\u4f60\u6700\u591a\u4e22\u6389\u4e00\u4e2a\u4e8b\u52a1\u6216\u8005\u662f\u4e00\u6761\u8bed\u53e5\uff0c\u4f46\u662f\u6b64\u65f6\u5b83\u7684\u6027\u80fd\u5f88\u5dee\uff0c\u6b64\u53c2\u6570\u8bbe\u4e3a0\u6216\u8005\u662f1\u4e4b\u95f4\u7684\u6027\u80fd\u80fd\u5dee4\uff5e5\u500d\u3002<\/p>\n<p>3\uff09\u5982\u679c\u4f60\u7528\u7684\u662f\u4e07\u5146\u5149\u7ea4\u9ad8\u901f\u78c1\u76d8\u50cf\u6216\u8005\u662fssd\u540c\u65f6data\u548cbinlog\u90fd\u653e\u5728\u4e00\u4e2a\u76ee\u5f55\u4e0b\u7684\u540c\u65f6\u4f60\u8981\u4e3a\u4e86\u5b89\u5168\u53ef\u4ee5\u5f00\u542f\u62101.<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u4e3a0<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>sync_binlog = 1<\/p><\/blockquote>\n<p><b>60)gtid_mode<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>on<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<ol>\n<li>\u4e3b\u4ece\u590d\u5236\u65f6\u7528\uff0c\u63a8\u8350\u5f00\u542f\u6210on\uff0c\u5b83\u7684\u7528\u5904\u5c31\u662f\u5141\u8bb8\u4f60\u5728\u4ece\u5e93\u4e0a\u8fdb\u884c\u201d\u5907\u4efd\u201c\uff0c\u4ece\u5e93\u4e0a\u5728\u8fdb\u884c\u5907\u4efd\u65f6\u5b83\u80fd\u591f\u83b7\u53d6\u4e3b\u5e93\u7684binlog\u4f4d\u70b9\u3002<\/li>\n<li>\u8be5\u53c2\u6570\u4e5f\u53ef\u4ee5\u52a8\u6001\u5728\u7ebf\u8bbe\u5b9a\u3002\u5982\u679c\u4f60\u8981\u5728\u7ebf\u8fd0\u884c\u65f6\u8bbe\u5b9a\uff0c\u5728my.cnf\u6587\u4ef6\u4e2d\u5fc5\u987b\u628a\u5b83\u8bbe\u6210on\u3002\u5728\u5f00\u542f\u8be5\u53c2\u6570\u65f6\uff0clog-bin\u548clog-slave-updates\u4e5f\u5fc5\u987b\u5f00\u542f\uff0c\u5426\u5219MySQL Server\u62d2\u7edd\u542f\u52a8\uff0c\u5f53\u5f00\u542fGTID\u6a21\u5f0f\u65f6\uff0c\u96c6\u7fa4\u4e2d\u7684\u5168\u90e8MySQL Server\u5fc5\u987b\u540c\u65f6\u914d\u7f6egtid_mod = ON\uff0c\u5426\u5219\u65e0\u6cd5\u540c\u6b65\u3002<\/li>\n<\/ol>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u4e3aoff<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>gtid_mode = on<\/p><\/blockquote>\n<p><b>61)enforce_gtid_consistency<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>1<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u4e3b\u4ece\u590d\u5236\u65f6\u7528\uff0c\u89c1gtid_mode\uff0c\u8fd9\u662f\u7275\u8fde\u53c2\u6570\uff0c\u968f\u7740gtid_mode\u7684\u5f00\u542f\u4e00\u8d77\u5f00\u542f\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u5fc5\u987b\u8ddf\u7740gtid_mode\u4e00\u8d77\u5f00\u542f\uff0c\u8981\u4e0d\u7136mysql\u5b9e\u4f8b\u8d77\u4e0d\u6765\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>enforce_gtid_consistency = 1<\/p><\/blockquote>\n<p><b>62)log_slave_updates<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>\u5b83\u53ea\u8981\u6807\u6ce8\u5728my.cnf\u91cc\u5c31\u4ee3\u8868\u8d77\u4f5c\u7528\u4e86\u3002<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u4e3b\u4ece\u590d\u5236\u65f6\u7528\uff0c\u89c1gtid_mode\uff0c\u8fd9\u662f\u7275\u8fde\u53c2\u6570\uff0c\u968f\u7740gtid_mode\u7684\u5f00\u542f\u4e00\u8d77\u5f00\u542f\u3002\u5b83\u53ea\u8981\u6807\u6ce8\u5728\u8fd9\u5c31\u53ef\u4ee5\u4e86\uff0c\u4ee3\u8868\u5f00\u542f\uff0c\u5426\u5219\u4e5f\u5c31\u4e0d\u8981\u6709\u8fd9\u4e00\u884c\u4e86\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u5b83\u662f\u7275\u8fde\u53c2\u6570\uff0c\u968f\u7740gtid_mode\u7684\u5f00\u542f\u4e00\u8d77\u5f00\u542f\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>log_slave_updates<\/p><\/blockquote>\n<p><b>63)binlog_format<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>row<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u4e3b\u4ece\u590d\u5236\u65f6\u7528\uff0cmysql5.7\u67093\u79cdbin log\u6a21\u5f0f\uff1a<\/p>\n<p>1. STATEMENT\uff1a\u5386\u53f2\u60a0\u4e45\uff0c\u6280\u672f\u6210\u719f,binlog\u6587\u4ef6\u8f83\u5c0f,binlog\u4e2d\u5305\u542b\u4e86\u6240\u6709\u6570\u636e\u5e93\u66f4\u6539\u4fe1\u606f\uff0c\u53ef\u4ee5\u636e\u6b64\u6765\u5ba1\u6838\u6570\u636e\u5e93\u7684\u5b89\u5168\u7b49\u60c5\u51b5\u3002binlog\u53ef\u4ee5\u7528\u4e8e\u5b9e\u65f6\u7684\u8fd8\u539f\uff0c\u800c\u4e0d\u4ec5\u4ec5\u7528\u4e8e\u590d\u5236\u4e3b\u4ece\u7248\u672c\u53ef\u4ee5\u4e0d\u4e00\u6837\uff0c\u4ece\u670d\u52a1\u5668\u7248\u672c\u53ef\u4ee5\u6bd4\u4e3b\u670d\u52a1\u5668\u7248\u672c\u9ad8\u3002\u7f3a\u70b9\u662f\uff1a\u4e0d\u662f\u6240\u6709\u7684UPDATE\u8bed\u53e5\u90fd\u80fd\u88ab\u590d\u5236\uff0c\u5c24\u5176\u662f\u5305\u542b\u4e0d\u786e\u5b9a\u64cd\u4f5c\u7684\u65f6\u5019\u3002\u8c03\u7528\u5177\u6709\u4e0d\u786e\u5b9a\u56e0\u7d20\u7684 UDF \u65f6\u590d\u5236\u4e5f\u53ef\u80fd\u51fa\u95ee\u9898\uff0c\u4f7f\u7528\u4ee5\u4e0b\u51fd\u6570\u7684\u8bed\u53e5\u4e5f\u65e0\u6cd5\u88ab\u590d\u5236\uff1a<\/p>\n<blockquote><p>* LOAD_FILE()<\/p>\n<p>* UUID()<\/p>\n<p>* USER()<\/p>\n<p>* FOUND_ROWS()<\/p>\n<p>* SYSDATE() (\u9664\u975e\u542f\u52a8\u65f6\u542f\u7528\u4e86 --sysdate-is-now \u9009\u9879)<\/p><\/blockquote>\n<p>2.\u540c\u65f6\uff0cINSERT ... SELECT \u4f1a\u4ea7\u751f\u6bd4 ROW \u66f4\u591a\u7684\u884c\u7ea7\u9501\uff0c\u590d\u5236\u9700\u8981\u8fdb\u884c\u5168\u8868\u626b\u63cf(WHERE \u8bed\u53e5\u4e2d\u6ca1\u6709\u4f7f\u7528\u5230\u7d22\u5f15)\u7684 UPDATE \u65f6\uff0c\u9700\u8981\u6bd4 RBR \u8bf7\u6c42\u66f4\u591a\u7684\u884c\u7ea7\u9501<\/p>\n<p>3.\u5bf9\u4e8e\u6709 AUTO_INCREMENT \u5b57\u6bb5\u7684 InnoDB\u8868\u800c\u8a00\uff0cINSERT \u8bed\u53e5\u4f1a\u963b\u585e\u5176\u4ed6 INSERT \u8bed\u53e5\uff0c\u5bf9\u4e8e\u4e00\u4e9b\u590d\u6742\u7684\u8bed\u53e5\uff0c\u5728\u4ece\u670d\u52a1\u5668\u4e0a\u7684\u8017\u8d44\u6e90\u60c5\u51b5\u4f1a\u66f4\u4e25\u91cd\uff0c\u800c RBR \u6a21\u5f0f\u4e0b\uff0c\u53ea\u4f1a\u5bf9\u90a3\u4e2a\u53d1\u751f\u53d8\u5316\u7684\u8bb0\u5f55\u4ea7\u751f\u5f71\u54cd\uff0c\u5b58\u50a8\u51fd\u6570(\u4e0d\u662f\u5b58\u50a8\u8fc7\u7a0b)\u5728\u88ab\u8c03\u7528\u7684\u540c\u65f6\u4e5f\u4f1a\u6267\u884c\u4e00\u6b21 NOW() \u51fd\u6570\uff0c\u8fd9\u4e2a\u53ef\u4ee5\u8bf4\u662f\u574f\u4e8b\u4e5f\u53ef\u80fd\u662f\u597d\u4e8b\uff0c\u786e\u5b9a\u4e86\u7684 UDF \u4e5f\u9700\u8981\u5728\u4ece\u670d\u52a1\u5668\u4e0a\u6267\u884c\uff0c\u6570\u636e\u8868\u5fc5\u987b\u51e0\u4e4e\u548c\u4e3b\u670d\u52a1\u5668\u4fdd\u6301\u4e00\u81f4\u624d\u884c\uff0c\u5426\u5219\u53ef\u80fd\u4f1a\u5bfc\u81f4\u590d\u5236\u51fa\u9519\uff0c\u6267\u884c\u590d\u6742\u8bed\u53e5\u5982\u679c\u51fa\u9519\u7684\u8bdd\uff0c\u4f1a\u6d88\u8017\u66f4\u591a\u8d44\u6e90\u3002<\/p>\n<p>2. ROW\uff1a\u4efb\u4f55\u60c5\u51b5\u90fd\u53ef\u4ee5\u88ab\u590d\u5236\uff0c\u8fd9\u5bf9\u590d\u5236\u6765\u8bf4\u662f\u6700\u5b89\u5168\u53ef\u9760\u7684\uff0c\u548c\u5176\u4ed6\u5927\u591a\u6570\u6570\u636e\u5e93\u7cfb\u7edf\u7684\u590d\u5236\u6280\u672f\u4e00\u6837\u3002\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u4ece\u670d\u52a1\u5668\u4e0a\u7684\u8868\u5982\u679c\u6709\u4e3b\u952e\u7684\u8bdd\uff0c\u590d\u5236\u5c31\u4f1a\u5feb\u4e86\u5f88\u591a\u3002\u590d\u5236\u4ee5\u4e0b\u51e0\u79cd\u8bed\u53e5\u65f6\u7684\u884c\u9501\u66f4\u5c11\uff1a<\/p>\n<p>* INSERT ... SELECT<\/p>\n<p>* \u5305\u542b AUTO_INCREMENT \u5b57\u6bb5\u7684 INSERT<\/p>\n<p>* \u6ca1\u6709\u9644\u5e26\u6761\u4ef6\u6216\u8005\u5e76\u6ca1\u6709\u4fee\u6539\u5f88\u591a\u8bb0\u5f55\u7684 UPDATE \u6216 DELETE \u8bed\u53e5<\/p>\n<p>\u6267\u884c INSERT\uff0cUPDATE\uff0cDELETE \u8bed\u53e5\u65f6\u9501\u66f4\u5c11\uff0c\u4ece\u670d\u52a1\u5668\u4e0a\u91c7\u7528\u591a\u7ebf\u7a0b\u6765\u6267\u884c\u590d\u5236\u6210\u4e3a\u53ef\u80fd\uff0c\u5b83\u7684\u7f3a\u70b9\u662f\uff1ainlog \u5927\u4e86\u5f88\u591a\uff0c\u590d\u6742\u7684\u56de\u6eda\u65f6 binlog \u4e2d\u4f1a\u5305\u542b\u5927\u91cf\u7684\u6570\u636e\uff0c\u4e3b\u670d\u52a1\u5668\u4e0a\u6267\u884c UPDATE \u8bed\u53e5\u65f6\uff0c\u6240\u6709\u53d1\u751f\u53d8\u5316\u7684\u8bb0\u5f55\u90fd\u4f1a\u5199\u5230 binlog \u4e2d\uff0c\u800c SBR \u53ea\u4f1a\u5199\u4e00\u6b21\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u9891\u7e41\u53d1\u751f binlog \u7684\u5e76\u53d1\u5199\u95ee\u9898\uff0cUDF \u4ea7\u751f\u7684\u5927 BLOB \u503c\u4f1a\u5bfc\u81f4\u590d\u5236\u53d8\u6162\uff0c\u65e0\u6cd5\u4ece binlog \u4e2d\u770b\u5230\u90fd\u590d\u5236\u4e86\u5199\u4ec0\u4e48\u8bed\u53e5\u3002<\/p>\n<p>\u4ece\u5b89\u5168\u548c\u7a33\u5b9a\u6027\u7684\u7f29\u5408\u8003\u8651\u4e0a\u6765\u8bf4\u6211\u4eec\u9009\u62e9ROW\u6a21\u5f0f\u3002<\/p>\n<p>3. \u6df7\u5408\u5f0f-\u4e0d\u63a8\u8350<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>5.7.6\u4e4b\u524d\u9ed8\u8ba4\u4e3aSTATEMENT\u6a21\u5f0f\u3002MySQL 5.7.7\u4e4b\u540e\u9ed8\u8ba4\u4e3aROW\u6a21\u5f0f<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>binlog_format = row<\/p><\/blockquote>\n<p><b>64)relay_log<\/b><\/p>\n<p>\u4e3b\u4ece\u590d\u5236\u7528\uff0c\u5b9a\u4e49relay_log\u7684\u4f4d\u7f6e\u548c\u540d\u79f0\uff0c\u5982\u679c\u503c\u4e3a\u7a7a\uff0c\u5219\u9ed8\u8ba4\u4f4d\u7f6e\u5728\u6570\u636e\u6587\u4ef6\u7684\u76ee\u5f55\uff08datadir\uff09\uff0c\u6587\u4ef6\u540d\u4e3ahost_name-relay-bin.nnnnnn\uff08By default, relay log file names have the form host_name-relay-bin.nnnnnn in the data directory\uff09<\/p>\n<p><b>65)relay_log_recovery<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>1<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<ol>\n<li>\u4e3b\u4ece\u590d\u5236\u7528\uff0c\u63a8\u8350\u503c\u4e3a1\uff0c\u5efa\u8bae\u6253\u5f00\u3002<\/li>\n<li>\u5f53slave\u4ece\u5e93\u5b95\u673a\u540e\uff0c\u5047\u5982relay-log\u635f\u574f\u4e86\uff0c\u5bfc\u81f4\u4e00\u90e8\u5206\u4e2d\u7ee7\u65e5\u5fd7\u6ca1\u6709\u5904\u7406\uff0c\u5219\u81ea\u52a8\u653e\u5f03\u6240\u6709\u672a\u6267\u884c\u7684relay-log\uff0c\u5e76\u4e14\u91cd\u65b0\u4ecemaster\u4e0a\u83b7\u53d6\u65e5\u5fd7\uff0c\u8fd9\u6837\u5c31\u4fdd\u8bc1\u4e86relay-log\u7684\u5b8c\u6574\u6027\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u8be5\u529f\u80fd\u662f\u5173\u95ed\u7684\uff0c\u5c06relay_log_recovery\u7684\u503c\u8bbe\u7f6e\u4e3a 1\u65f6\uff0c\u53ef\u5728slave\u4ece\u5e93\u4e0a\u5f00\u542f\u8be5\u529f\u80fd\uff0c\u5efa\u8bae\u5f00\u542f\u3002<\/li>\n<\/ol>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u662f\u5173\u95ed\u7684\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>relay_log_recovery = 1<\/p><\/blockquote>\n<p><b>66)slave_skip_errors<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>ddl_exist_errors<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u4e3b\u4ece\u590d\u5236\u7528\uff0c\u63a8\u8350\u503c\uff1addl_exist_errors\u3002\u7406\u8bba\u4e0a\u6211\u4eec\u4e0d\u5e94\u8be5\u8bbe\u7f6e\u8fd9\u4e2a\u503c\u7684\u3002\u5373\u5b83\u5728my.cnf\u6587\u4ef6\u4e2d\u5e94\u8be5\u662f\u6d88\u5931\u7684\u6216\u8005\u662f\u8fd9\u6837\u7684\u8868\u793a\u7684\uff1a<\/p>\n<p>#slave_skip_errors = ddl_exist_errors<\/p>\n<p>\u4f46\u662f\u6709\u65f6\u6211\u4eec\u7684\u4e00\u4e9b\u8868\uff08\u7279\u522b\u662f\u4e0d\u719f\u6089mysql\u7684\u4e00\u4e9b\u5f00\u53d1\uff09\u771f\u7684\u662f\u7528\u7684\u662fmysql5.6\u65e7\u7248\u7684\u5efa\u8868\u8bed\u53e5\uff0c\u8fd9\u4e2a\u95ee\u9898\u5728\u5e73\u65f6\u5355\u673a\u6a21\u5f0f\u4e0b\u5f88\u96be\u53d1\u73b0\uff0c\u4e00\u65e6\u4e3b\u4ece\u7ed3\u6784\u4e00\u4e0a\u540e\uff0c\u57285.7\u4e0a\u771f\u7684\u662f\u6709\u4e00\u5b9a\u673a\u7387\uff08\u670910%-20%\u7684\u673a\u7387\uff09\u78b0\u5230ddl\u8bed\u53e5\u662f\u65e7\u7248mysql\u800c\u8fd0\u884c\u5728mysql5.7\u4e0a\uff0c\u8fd9\u65f6\u5728\u4e3b\u4ece\u590d\u5236\u65f6\u4f1a\u629b\u4e00\u4e2a\u65e0\u6cd5\u4e3b\u4ece\u590d\u5236\u7684\u9519\uff0c\u90a3\u4e48\u8fd9\u65f6\u6211\u4eec\u9700\u8981\u6293\u6570\u636e\uff0c\u8868\u5df2\u7ecf\u5efa\u597d\u4e86\uff0c\u8fd9\u4e2a\u5f71\u54cd\u4e0d\u5927\u3001\u5fae\u4e4e\u5176\u5fae\uff0c\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u628a\u5b83\u8bbe\u6210\u201d\u5ffd\u7565\u201c\u3002\u8fd9\u4e2a\u662f\u672c\u4eba\u7684\u5410\u8840\u7ecf\u9a8c\uff0c\u4e3a\u4ec0\u4e48\u8981\u63d0\u8fd9\u4e2a\u6897\u3002\u3002\u3002\u4f60\u4eec\u61c2\u7684\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u5982\u679c\u56e0\u4e3a\u5efa\u8868\u8bed\u53e5\u548cmysql5.7\u6709\u51b2\u7a81\u65f6\u5728\u5355\u5b9e\u4f8b\u6a21\u5f0f\u4e0bmysql\u8fd0\u884c\u65f6\u4e0d\u4f1a\u53d1\u73b0\uff0c\u5728\u4e3b\u4ece\u590d\u5236\u65f6\u5982\u679c\u6ca1\u6709\u8bbe\u8df3\u8fc7\u503c\uff0c\u4e00\u65e6\u53d1\u751f\uff0c\u4f1a\u5f71\u54cd\u4e3b\u4ece\u590d\u5236\uff0c\u8868\u73b0\u5c31\u662f\uff1a\u4e3b\u4ece\u590d\u5236\u5931\u8d25\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>slave_skip_errors = ddl_exist_errors<\/p><\/blockquote>\n<p><b>67)innodb_buffer_pool_dump_pct<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>25~40<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<ol>\n<li>\u9526\u4e0a\u6dfb\u82b1\u7684\u503c\uff0c\u975e\u5fc5\u8981\uff0c\u8fd9\u8fb9\u7ed9\u51fa\u4e00\u4e9bbest practice:<\/li>\n<li>\u901a\u5e38\u6765\u8bf4\u6211\u4eec\u4f1a\u8bbe\u621025%\u3002\u5bf9\u4e8e\u5927\u5e76\u53d1\u524d\u63d0\u4e0b\u6211\u4eec\u4f1a\u4f7f\u752840\u8fd9\u4e2a\u503c\uff0c\u8fd9\u4e2a\u503c\u8d8a\u5927\uff0cmysql\u542f\u52a8\u65f6\u95f4\u8d8a\u957f\u3002\u5b83\u662f\u4f60\u7684innodb_buffer_pool_size\u7684\u767e\u5206\u6bd4\uff01<\/li>\n<li>MySQL\u9ed8\u8ba4\u5728InnoDB\u7f13\u51b2\u6c60\uff08\u800c\u4e0d\u662f\u6574\u4e2a\u7f13\u51b2\u6c60\uff09\u4e2d\u4ec5\u4fdd\u7559\u6700\u9891\u7e41\u8bbf\u95ee\u9875\u768425%\u3002\u8bf7\u6ce8\u610f\uff0c\u8fd9\u4e2a\u53d8\u91cf\u662f\u57fa\u4e8e\u5185\u5b58\u4e2d\u7684\u5b9e\u9645\u6570\u636e\u91cf\uff0c\u800c\u4e0d\u662f\u7f13\u51b2\u6c60\u7684\u5927\u5c0f\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6709100GB\u7684\u7f13\u51b2\u6c60\uff0c\u4f46\u53ea\u670910GB\u7684\u6570\u636e\uff0c\u9ed8\u8ba4\u53ea\u670910GB\u768425%\uff08\u53732.5GB\uff09\u6570\u636e\u4fdd\u5b58\u5728\u5185\u5b58\u4e2d\u3002<\/li>\n<li>\u5728\u591a\u6570\u4f7f\u7528\u573a\u666f\u4e0b\uff0c\u5408\u7406\u7684\u9009\u62e9\u662f\uff1a\u4fdd\u7559\u6700\u6709\u7528\u7684\u6570\u636e\u9875\uff0c\u6bd4\u52a0\u8f7d\u6240\u6709\u7684\u9875(\u5f88\u591a\u9875\u53ef\u80fd\u5728\u540e\u7eed\u7684\u5de5\u4f5c\u4e2d\u5e76\u6ca1\u6709\u8bbf\u95ee\u5230)\u5728\u7f13\u51b2\u6c60\u4e2d\u8981\u66f4\u5feb\u3002\u4f60\u53ef\u4ee5\u66f4\u6539innodb_buffer_pool_dump_pct\u53d8\u91cf\u7684\u503c\u3002<\/li>\n<\/ol>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u4e0d\u914d\u7684\u8bdd\u4e0d\u751f\u6548\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_buffer_pool_dump_pct=25<\/p><\/blockquote>\n<p><b>68)innodb_page_cleaners=8<\/b><\/p>\n<p>\u8fd9\u503c\u4e00\u822c\u4f1a\u5728\u4e3b\u4ece\u5ef6\u8fdf\u7684\u60c5\u51b5\u4e0b\u4f1a\u53bb\u8bbe\uff0c\u5b83\u7684\u503c\u6700\u597d\u662f=innodb_buffer_pool_instance\u7684\u503c\uff0c\u5b83\u5c31\u662fcpu\u7684\u6838\u6570\u3002<\/p>\n<p><b>69)innodb_undo_log_truncate<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>1<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<ol>\n<li>\u5efa\u8bae\u5f00\u542f\uff0c\u8bbe\u4e3a1<\/li>\n<li>innodb_undo_log_truncate\u53c2\u6570\u8bbe\u7f6e\u4e3a1\uff0c\u5373\u5f00\u542f\u5728\u7ebf\u56de\u6536\uff08\u6536\u7f29\uff09undo log\u65e5\u5fd7\u6587\u4ef6\uff0c\u652f\u6301\u52a8\u6001\u8bbe\u7f6e\u3002<\/li>\n<\/ol>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u4e0d\u914d\u7684\u8bdd\u662f\u4e0d\u751f\u6548\u7684\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_undo_log_truncate=1<\/p><\/blockquote>\n<p><b>70)innodb_max_undo_log_size<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>\u63a8\u8350\u5728\u9ed8\u8ba4\u503c\u76842\u500d\uff08\u9ed8\u8ba4\u4e3a1GB\uff09<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u63a8\u8350\u5728\u9ed8\u8ba4\u503c\u76842\u500d\uff08\u9ed8\u8ba4\u4e3a1GB\uff09\uff0c\u4e00\u822c\u6211\u4eec\u4e0d\u4f1a\u8f7b\u6613\u53bb\u8bbe\u5b83\u3002<\/p>\n<p>\u8fd9\u4e2a\u503c\u548cinnodb_undo_tablespaces\u3001innodb_undo_logs\u4ee5\u53cainnodb_purge_rseg_truncate_frequency\u6709\u5173\uff0c\u8fd94\u4e2a\u503c\u662f\u4e92\u76f8\u6709\u7275\u8fde\u7684\u3002<\/p>\n<p>1\uff09innodb_undo_tablespaces\u5fc5\u987b\u4e3a&gt;=3<\/p>\n<p>2\uff09innodb_undo_logs\u5fc5\u987b\u5f00\u542f<\/p>\n<p>3\uff09innodb_purge_rseg_truncate_frequence\u5fc5\u987b\u5f00\u542f<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u7cfb\u7edf\u6309\u71671GB\u6765\u8ba1\u7b97\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_max_undo_log_size=2G<\/p><\/blockquote>\n<p><b>71)innodb_purge_rseg_truncate_frequency<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>128<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u9ed8\u8ba4\u503c\u5728128\uff0c\u8fd9\u4e2a\u503c\u4e0d\u592a\u4f1a\u53bb\u78b0\u3002\u63a7\u5236\u56de\u6536undo log\u7684\u9891\u7387\u3002 \u6307\u5b9apurge\u64cd\u4f5c\u88ab\u5524\u8d77\u591a\u5c11\u6b21\u4e4b\u540e\u624d\u91ca\u653erollback segments\u3002\u5f53undo\u8868\u7a7a\u95f4\u91cc\u9762\u7684rollback segments\u88ab\u91ca\u653e\u65f6\uff0cundo\u8868\u7a7a\u95f4\u624d\u4f1a\u88abtruncate\u3002\u7531\u6b64\u53ef\u89c1\uff0c\u8be5\u53c2\u6570\u8d8a\u5c0f\uff0cundo\u8868\u7a7a\u95f4\u88ab\u5c1d\u8bd5truncate\u7684\u9891\u7387\u8d8a\u9ad8\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u7cfb\u7edf\u9ed8\u8ba4\u6309\u7167\uff1a128\u53bb\u8bbe\u5b9a\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>innodb_purge_rseg_truncate_frequency=128<\/p><\/blockquote>\n<p><b>72)binlog_gtid_simple_recovery<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>\u5efa\u8bae\u5f00\u542f<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<ol>\n<li>\u524d\u63d0\u662f\u4f60\u7684mysql\u5fc5\u987b&gt;5.7.6\uff0c\u5426\u5219\u8981\u8bbe\u4e3a\u5173\u95ed\u3002<\/li>\n<li>\u8fd9\u4e2a\u53c2\u6570\u63a7\u5236\u4e86\u5f53mysql\u542f\u52a8\u6216\u91cd\u542f\u65f6\uff0cmysql\u5728\u641c\u5bfbGTIDs\u65f6\u662f\u5982\u4f55\u8fed\u4ee3\u4f7f\u7528binlog\u6587\u4ef6\u7684\u3002<\/li>\n<li>\u8fd9\u4e2a\u9009\u9879\u8bbe\u7f6e\u4e3a\u771f\uff0c\u4f1a\u63d0\u5347mysql\u6267\u884c\u6062\u590d\u7684\u6027\u80fd\u3002\u56e0\u4e3a\u8fd9\u6837mysql-server\u542f\u52a8\u548cbinlog\u65e5\u5fd7\u6e05\u7406\u66f4\u5feb\u3002\u8be5\u53c2\u6570\u4e3a\u771f\u65f6\uff0cmysql-server\u53ea\u9700\u6253\u5f00\u6700\u8001\u7684\u548c\u6700\u65b0\u7684\u8fd92\u4e2abinlog\u6587\u4ef6\u3002<\/li>\n<\/ol>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u4e3a0<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>binlog_gtid_simple_recovery=1<\/p><\/blockquote>\n<p><b>73)log_timestamps<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>system<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<ol>\n<li>\u63a8\u8350\u4f7f\u7528:system<\/li>\n<li>\u8fd9\u4e2a\u53c2\u6570\u4e3b\u8981\u662f\u63a7\u5236\u9519\u8bef\u65e5\u5fd7\u3001\u6162\u67e5\u8be2\u65e5\u5fd7\u7b49\u65e5\u5fd7\u4e2d\u7684\u663e\u793a\u65f6\u95f4\u3002\u4f46\u5b83\u4e0d\u4f1a\u5f71\u54cd\u67e5\u8be2\u65e5\u5fd7\u548c\u6162\u65e5\u5fd7\u5199\u5230\u8868 (mysql.general_log, mysql.slow_log) \u4e2d\u7684\u663e\u793a\u65f6\u95f4\uff0c\u6b64\u53c2\u6570\u662f\u5168\u5c40\u7684\uff0c\u53ef\u4ee5\u52a8\u6001\u4fee\u6539\u3002<\/li>\n<\/ol>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u503c\u4e3a:UTC<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>log_timestamps=system<\/p><\/blockquote>\n<p><b>74)transaction_write_set_extraction<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>\u8fd9\u4e2a\u503c\u4e0d\u9700\u8981\u53bb\u8bbe\uff0c\u56e0\u4e3a\u4f60\u7528\u7684\u4e0d\u662fmysql8.0\uff0c\u57285.7.6\u7248\u4ee5\u540e\u8fd9\u4e2a\u5236\u4e0d\u662f\u5f88\u6210\u719f\uff0c\u5982\u679c\u8981\u5f00\u542f\u4e00\u822c\u4f1a\u4f7f\u7528\uff1aXXHASH64.<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u8fd9\u4e2a\u503c\u662f\u57fa\u4e8egroup(\u5e76\u884c\uff09\u590d\u5236\u7528\u7684\uff0c\u63a8\u8350\u503c\u4e3a\uff1aXXHASH64\uff0c\u5982\u679c\u6ca1\u6709\u5f00\u542f\u57fa\u4e8egroup\uff08\u5e76\u884c\uff09\u7684\u590d\u5236\u5343\u4e07\u4e0d\u8981\u53bb\u8bbe\u8fd9\u4e2a\u53c2\u6570\uff0c\u8bbe\u90fd\u4e0d\u7528\u53bb\u8bbe\uff0c\u4fdd\u6301\u9ed8\u8ba4\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u4e3aoff\u72b6\u6001\uff0c\u5373\u4e0d\u751f\u6548\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<pre class=\"hljs bash\"><code class=\"hljs bash copyable\" lang=\"bash\">transaction_write_set_extraction = OFFtransaction_write_set_extraction = XXHASH64transaction_write_set_extraction = MURMUR32<span class=\"copy-code-btn\">\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n<p><b>75)show_compatibility_56<\/b><\/p>\n<p>\u63a8\u8350\u8bbe\u7f6e\uff1a<\/p>\n<blockquote><p>on<\/p><\/blockquote>\n<p>\u4f5c\u7528\uff1a<\/p>\n<p>\u63a8\u8350\u6253\u5f00\u3002\u8fd9\u4e2a\u53c2\u6570\u662f\u517c\u5bb9mysql5.6\u7248\u7684INFORMATION_SCHEMA.GLOBAL_STATUS\u76f8\u5173\u529f\u80fd\u7684\uff0c\u5b83\u6709\u5229\u4e8e\u4ece5.6\u52305.7\u7684\u8fc7\u6e21\u65f6\u975emysql\u4e13\u804cdba\u4f46\u662f\u61c2mysql\u7684\u8fd0\u7ef4\u7528\u7684\u3002<\/p>\n<p>\u5982\u679c\u4e0d\u914d\u7684\u540e\u679c\uff1a<\/p>\n<blockquote><p>\u9ed8\u8ba4\u662foff\u3002\u76f8\u5f53\u4e8e\u4e25\u683c\u6a21\u5f0f\u3002<\/p><\/blockquote>\n<p>\u914d\u7f6e\u5b9e\u4f8b\uff1a<\/p>\n<blockquote><p>show_compatibility_56=on<\/p><\/blockquote>\n<p>\u81f3\u6b64\uff0c\u672c\u6587\u5b8c\uff0c\u4e00\u5171\u4ecb\u7ecd\u4e86mysql5.7\u6027\u80fd\u63d0\u5347\u768475\u79cd\u65b9\u6cd5\u548c\u8be6\u7ec6\u89e3\u91ca\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n<\/div>\n<p>\u4f5c\u8005\uff1a\u5b66java\u7684\u77f3\u5934<br \/>\n\u94fe\u63a5\uff1ahttps:\/\/juejin.cn\/post\/6844904152166842376<br \/>\n\u6765\u6e90\uff1a\u6398\u91d1<br \/>\n\u8457\u4f5c\u6743\u5f52\u4f5c\u8005\u6240\u6709\u3002\u5546\u4e1a\u8f6c\u8f7d\u8bf7\u8054\u7cfb\u4f5c\u8005\u83b7\u5f97\u6388\u6743\uff0c\u975e\u5546\u4e1a\u8f6c\u8f7d\u8bf7\u6ce8\u660e\u51fa\u5904\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u8a00\uff1a\u5168\u6587\u4e2d\u4e00\u5171\u6709\u5e38\u7528\u7684\uff08\u4e8b\u5b9e\u4e0a\u4f60\u5982\u679c\u82b11-2\u5468\u9605\u8bfb\u3001\u7406\u89e3\u3001\u81ea\u5df1\u52a8\u624b\u8bbe\u4e00\u4e0b\u540e\u662f\u9700\u8981\u8fd9\u4e48\u591a\u53c2\u6570\u7684\uff0976\u4e2a\u53c2\u6570\uff0c\u7b14 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[167,169,168,170],"class_list":["post-679","post","type-post","status-publish","format-standard","hentry","category-wordpress","tag-mysql","tag-168","tag-170"],"_links":{"self":[{"href":"https:\/\/byy3.com\/index.php?rest_route=\/wp\/v2\/posts\/679","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/byy3.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/byy3.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/byy3.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/byy3.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=679"}],"version-history":[{"count":0,"href":"https:\/\/byy3.com\/index.php?rest_route=\/wp\/v2\/posts\/679\/revisions"}],"wp:attachment":[{"href":"https:\/\/byy3.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=679"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/byy3.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=679"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/byy3.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=679"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}