{"id":164827,"date":"2024-11-05T10:09:05","date_gmt":"2024-11-05T02:09:05","guid":{"rendered":"https:\/\/server.hk\/cnblog\/164827\/"},"modified":"2024-11-05T10:09:06","modified_gmt":"2024-11-05T02:09:06","slug":"%e9%96%8b%e5%95%9fmysql%e6%85%a2%e6%9f%a5%e8%a9%a2-%e6%9f%a5%e6%89%be%e5%bd%b1%e9%9f%bf%e6%95%88%e7%8e%87%e7%9a%84sql%e8%aa%9e%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/164827\/","title":{"rendered":"\u958b\u555fMySQL\u6162\u67e5\u8a62 \u67e5\u627e\u5f71\u97ff\u6548\u7387\u7684SQL\u8a9e\u53e5"},"content":{"rendered":"<h1 id=\"%e9%96%8b%e5%95%9fmysql%e6%85%a2%e6%9f%a5%e8%a9%a2-%e6%9f%a5%e6%89%be%e5%bd%b1%e9%9f%bf%e6%95%88%e7%8e%87%e7%9a%84sql%e8%aa%9e%e5%8f%a5-NxkrzFyTKQ\">\u958b\u555fMySQL\u6162\u67e5\u8a62 \u67e5\u627e\u5f71\u97ff\u6548\u7387\u7684SQL\u8a9e\u53e5<\/h1>\n<p>\u5728\u73fe\u4ee3\u7684\u6578\u64da\u9a45\u52d5\u74b0\u5883\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u6027\u80fd\u5c0d\u65bc\u61c9\u7528\u7a0b\u5e8f\u7684\u6574\u9ad4\u6548\u7387\u81f3\u95dc\u91cd\u8981\u3002MySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u5de5\u5177\u4f86\u5e6b\u52a9\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u512a\u5316\u67e5\u8a62\u6027\u80fd\u3002\u5176\u4e2d\uff0c\u6162\u67e5\u8a62\u65e5\u8a8c\uff08Slow Query Log\uff09\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u529f\u80fd\uff0c\u53ef\u4ee5\u5e6b\u52a9\u8b58\u5225\u90a3\u4e9b\u5f71\u97ff\u7cfb\u7d71\u6027\u80fd\u7684SQL\u8a9e\u53e5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%85%a2%e6%9f%a5%e8%a9%a2%e6%97%a5%e8%aa%8c%ef%bc%9f-NxkrzFyTKQ\">\u4ec0\u9ebc\u662f\u6162\u67e5\u8a62\u65e5\u8a8c\uff1f<\/h2>\n<p>\u6162\u67e5\u8a62\u65e5\u8a8c\u662fMySQL\u7684\u4e00\u500b\u529f\u80fd\uff0c\u7528\u65bc\u8a18\u9304\u57f7\u884c\u6642\u9593\u8d85\u904e\u6307\u5b9a\u95be\u503c\u7684SQL\u67e5\u8a62\u3002\u9019\u4e9b\u67e5\u8a62\u53ef\u80fd\u6703\u5c0e\u81f4\u7cfb\u7d71\u6027\u80fd\u4e0b\u964d\uff0c\u56e0\u6b64\u901a\u904e\u5206\u6790\u9019\u4e9b\u67e5\u8a62\uff0c\u53ef\u4ee5\u627e\u51fa\u6027\u80fd\u74f6\u9838\u4e26\u9032\u884c\u512a\u5316\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%95%9f%e7%94%a8%e6%85%a2%e6%9f%a5%e8%a9%a2%e6%97%a5%e8%aa%8c-NxkrzFyTKQ\">\u5982\u4f55\u555f\u7528\u6162\u67e5\u8a62\u65e5\u8a8c<\/h2>\n<p>\u8981\u555f\u7528\u6162\u67e5\u8a62\u65e5\u8a8c\uff0c\u60a8\u9700\u8981\u4fee\u6539MySQL\u7684\u914d\u7f6e\u6587\u4ef6\uff08\u901a\u5e38\u662fmy.cnf\u6216my.ini\uff09\u3002\u4ee5\u4e0b\u662f\u555f\u7528\u6162\u67e5\u8a62\u65e5\u8a8c\u7684\u6b65\u9a5f\uff1a<\/p>\n<pre><code>[mysqld]\nslow_query_log = 1\nslow_query_log_file = \/var\/log\/mysql\/slow-query.log\nlong_query_time = 2\n<\/code><\/pre>\n<ul>\n<li><strong>slow_query_log<\/strong>: \u8a2d\u7f6e\u70ba1\u4ee5\u555f\u7528\u6162\u67e5\u8a62\u65e5\u8a8c\u3002<\/li>\n<li><strong>slow_query_log_file<\/strong>: \u6307\u5b9a\u6162\u67e5\u8a62\u65e5\u8a8c\u7684\u5b58\u5132\u8def\u5f91\u3002<\/li>\n<li><strong>long_query_time<\/strong>: \u8a2d\u7f6e\u67e5\u8a62\u57f7\u884c\u6642\u9593\u7684\u95be\u503c\uff08\u4ee5\u79d2\u70ba\u55ae\u4f4d\uff09\uff0c\u8d85\u904e\u6b64\u6642\u9593\u7684\u67e5\u8a62\u5c07\u88ab\u8a18\u9304\u3002<\/li>\n<\/ul>\n<p>\u5b8c\u6210\u914d\u7f6e\u5f8c\uff0c\u91cd\u555fMySQL\u670d\u52d9\u4ee5\u4f7f\u66f4\u6539\u751f\u6548\u3002<\/p>\n<h2 id=\"%e5%88%86%e6%9e%90%e6%85%a2%e6%9f%a5%e8%a9%a2%e6%97%a5%e8%aa%8c-NxkrzFyTKQ\">\u5206\u6790\u6162\u67e5\u8a62\u65e5\u8a8c<\/h2>\n<p>\u4e00\u65e6\u6162\u67e5\u8a62\u65e5\u8a8c\u555f\u7528\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u591a\u7a2e\u5de5\u5177\u4f86\u5206\u6790\u65e5\u8a8c\u6587\u4ef6\u3002MySQL\u81ea\u5e36\u7684\u5de5\u5177\u662f<code>mysqldumpslow<\/code>\uff0c\u5b83\u53ef\u4ee5\u5e6b\u52a9\u60a8\u532f\u7e3d\u548c\u5206\u6790\u6162\u67e5\u8a62\u65e5\u8a8c\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528<code>mysqldumpslow<\/code>\u7684\u57fa\u672c\u547d\u4ee4\uff1a<\/p>\n<pre><code>mysqldumpslow -s t \/var\/log\/mysql\/slow-query.log\n<\/code><\/pre>\n<p>\u9019\u500b\u547d\u4ee4\u6703\u6839\u64da\u67e5\u8a62\u57f7\u884c\u6642\u9593\u5c0d\u6162\u67e5\u8a62\u9032\u884c\u6392\u5e8f\uff0c\u5e6b\u52a9\u60a8\u5feb\u901f\u627e\u5230\u6700\u8017\u6642\u7684\u67e5\u8a62\u3002<\/p>\n<h2 id=\"%e5%84%aa%e5%8c%96%e6%85%a2%e6%9f%a5%e8%a9%a2%e7%9a%84%e7%ad%96%e7%95%a5-NxkrzFyTKQ\">\u512a\u5316\u6162\u67e5\u8a62\u7684\u7b56\u7565<\/h2>\n<p>\u5728\u8b58\u5225\u51fa\u6162\u67e5\u8a62\u5f8c\uff0c\u60a8\u53ef\u4ee5\u63a1\u53d6\u4ee5\u4e0b\u5e7e\u7a2e\u7b56\u7565\u4f86\u512a\u5316\u5b83\u5011\uff1a<\/p>\n<ul>\n<li><strong>\u7d22\u5f15\u512a\u5316<\/strong>: \u78ba\u4fdd\u67e5\u8a62\u4e2d\u4f7f\u7528\u7684\u5217\u6709\u9069\u7576\u7684\u7d22\u5f15\u3002\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<li><strong>\u67e5\u8a62\u91cd\u5beb<\/strong>: \u6709\u6642\u5019\uff0c\u901a\u904e\u91cd\u5beb\u67e5\u8a62\u8a9e\u53e5\uff0c\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002\u4f8b\u5982\uff0c\u4f7f\u7528<code>JOIN<\/code>\u66ff\u4ee3\u5b50\u67e5\u8a62\uff0c\u6216\u662f\u907f\u514d\u4f7f\u7528<code>SELECT *<\/code>\u3002<\/li>\n<li><strong>\u6578\u64da\u5eab\u8a2d\u8a08<\/strong>: \u78ba\u4fdd\u6578\u64da\u5eab\u7684\u8a2d\u8a08\u7b26\u5408\u6b63\u898f\u5316\u539f\u5247\uff0c\u4e26\u8003\u616e\u4f7f\u7528\u5206\u5340\u8868\u4f86\u7ba1\u7406\u5927\u6578\u64da\u96c6\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-NxkrzFyTKQ\">\u7d50\u8ad6<\/h2>\n<p>\u958b\u555fMySQL\u7684\u6162\u67e5\u8a62\u65e5\u8a8c\u662f\u4e00\u500b\u6709\u6548\u7684\u65b9\u5f0f\u4f86\u8b58\u5225\u548c\u512a\u5316\u5f71\u97ff\u6578\u64da\u5eab\u6027\u80fd\u7684SQL\u8a9e\u53e5\u3002\u901a\u904e\u5206\u6790\u6162\u67e5\u8a62\u65e5\u8a8c\uff0c\u60a8\u53ef\u4ee5\u627e\u5230\u6027\u80fd\u74f6\u9838\u4e26\u63a1\u53d6\u76f8\u61c9\u7684\u512a\u5316\u63aa\u65bd\uff0c\u5f9e\u800c\u63d0\u5347\u6574\u9ad4\u7cfb\u7d71\u7684\u6548\u7387\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\u7a0b\u5e8f\u4f86\u8aaa\uff0c\u9019\u662f\u4e00\u500b\u4e0d\u53ef\u6216\u7f3a\u7684\u6b65\u9a5f\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u78ba\u4fdd\u6700\u4f73\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u958b\u555fMySQL\u6162\u67e5\u8a62\u529f\u80fd\uff0c\u8f15\u9b06\u67e5\u627e\u5f71\u97ff\u6548\u7387\u7684SQL\u8a9e\u53e5\uff0c\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\uff0c\u63d0\u5347\u61c9\u7528\u901f\u5ea6\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-164827","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164827","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=164827"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164827\/revisions"}],"predecessor-version":[{"id":164828,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164827\/revisions\/164828"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=164827"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=164827"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=164827"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}