{"id":183452,"date":"2024-11-10T04:56:18","date_gmt":"2024-11-09T20:56:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/183452\/"},"modified":"2024-11-10T04:56:19","modified_gmt":"2024-11-09T20:56:19","slug":"%e5%af%a6%e7%94%a8%e7%9a%84mysql%e8%aa%bf%e8%a9%a6%e5%92%8c%e5%84%aa%e5%8c%96%e6%8a%80%e5%b7%a7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/183452\/","title":{"rendered":"\u5be6\u7528\u7684MySQL\u8abf\u8a66\u548c\u512a\u5316\u6280\u5de7"},"content":{"rendered":"<h1 id=\"%e5%af%a6%e7%94%a8%e7%9a%84mysql%e8%aa%bf%e8%a9%a6%e5%92%8c%e5%84%aa%e5%8c%96%e6%8a%80%e5%b7%a7-ZFARnzwQDP\">\u5be6\u7528\u7684MySQL\u8abf\u8a66\u548c\u512a\u5316\u6280\u5de7<\/h1>\n<p>MySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u958b\u6e90\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u56e0\u5176\u9ad8\u6548\u80fd\u548c\u9748\u6d3b\u6027\u800c\u53d7\u5230\u958b\u767c\u8005\u7684\u9752\u775e\u3002\u7136\u800c\uff0c\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\u548c\u61c9\u7528\u9700\u6c42\u7684\u8b8a\u5316\uff0cMySQL\u7684\u6027\u80fd\u53ef\u80fd\u6703\u53d7\u5230\u5f71\u97ff\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u4e00\u4e9b\u5be6\u7528\u7684MySQL\u8abf\u8a66\u548c\u512a\u5316\u6280\u5de7\uff0c\u5e6b\u52a9\u7528\u6236\u63d0\u5347\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n<h2 id=\"1-%e4%bd%bf%e7%94%a8explain%e5%88%86%e6%9e%90%e6%9f%a5%e8%a9%a2-ZFARnzwQDP\">1. \u4f7f\u7528EXPLAIN\u5206\u6790\u67e5\u8a62<\/h2>\n<p>\u5728\u512a\u5316\u67e5\u8a62\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u4e86\u89e3\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\u3002\u4f7f\u7528<code>EXPLAIN<\/code>\u8a9e\u53e5\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u5206\u6790\u67e5\u8a62\u7684\u57f7\u884c\u65b9\u5f0f\uff0c\u5f9e\u800c\u627e\u51fa\u6f5b\u5728\u7684\u6027\u80fd\u74f6\u9838\u3002<\/p>\n<pre><code>EXPLAIN SELECT * FROM users WHERE age &gt; 30;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u986f\u793aMySQL\u5982\u4f55\u57f7\u884c\u67e5\u8a62\uff0c\u5305\u62ec\u4f7f\u7528\u7684\u7d22\u5f15\u3001\u884c\u6578\u4f30\u7b97\u7b49\u4fe1\u606f\u3002\u6839\u64da\u9019\u4e9b\u4fe1\u606f\uff0c\u53ef\u4ee5\u8abf\u6574\u67e5\u8a62\u6216\u6dfb\u52a0\u7d22\u5f15\u4f86\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n<h2 id=\"2-%e5%84%aa%e5%8c%96%e7%b4%a2%e5%bc%95-ZFARnzwQDP\">2. \u512a\u5316\u7d22\u5f15<\/h2>\n<p>\u7d22\u5f15\u662f\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u7684\u95dc\u9375\u3002\u9069\u7576\u7684\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u6e1b\u5c11\u67e5\u8a62\u7684\u57f7\u884c\u6642\u9593\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u7d22\u5f15\u512a\u5316\u7684\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li><strong>\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b\uff1a<\/strong>\u6839\u64da\u67e5\u8a62\u7684\u7279\u6027\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b\uff0c\u5982B-Tree\u7d22\u5f15\u3001\u54c8\u5e0c\u7d22\u5f15\u7b49\u3002<\/li>\n<li><strong>\u907f\u514d\u904e\u591a\u7684\u7d22\u5f15\uff1a<\/strong>\u96d6\u7136\u7d22\u5f15\u53ef\u4ee5\u52a0\u5feb\u67e5\u8a62\u901f\u5ea6\uff0c\u4f46\u904e\u591a\u7684\u7d22\u5f15\u6703\u5f71\u97ff\u5beb\u5165\u6027\u80fd\uff0c\u56e0\u6b64\u61c9\u6839\u64da\u5be6\u969b\u9700\u6c42\u9032\u884c\u5408\u7406\u914d\u7f6e\u3002<\/li>\n<li><strong>\u4f7f\u7528\u8907\u5408\u7d22\u5f15\uff1a<\/strong>\u5c0d\u65bc\u591a\u500b\u5217\u7684\u67e5\u8a62\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u8907\u5408\u7d22\u5f15\u4f86\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"3-%e8%aa%bf%e6%95%b4mysql%e9%85%8d%e7%bd%ae-ZFARnzwQDP\">3. \u8abf\u6574MySQL\u914d\u7f6e<\/h2>\n<p>MySQL\u7684\u6027\u80fd\u4e5f\u53d7\u5230\u5176\u914d\u7f6e\u7684\u5f71\u97ff\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u914d\u7f6e\u8abf\u6574\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li><strong>\u8abf\u6574\u7de9\u885d\u5340\u5927\u5c0f\uff1a<\/strong>\u6839\u64da\u7cfb\u7d71\u5167\u5b58\u5927\u5c0f\u8abf\u6574<code>innodb_buffer_pool_size<\/code>\uff0c\u4ee5\u63d0\u9ad8InnoDB\u7684\u6027\u80fd\u3002<\/li>\n<li><strong>\u8a2d\u7f6e\u67e5\u8a62\u7de9\u5b58\uff1a<\/strong>\u555f\u7528\u67e5\u8a62\u7de9\u5b58\u53ef\u4ee5\u52a0\u5feb\u91cd\u8907\u67e5\u8a62\u7684\u901f\u5ea6\uff0c\u4f46\u9700\u6839\u64da\u5be6\u969b\u60c5\u6cc1\u9032\u884c\u8abf\u6574\u3002<\/li>\n<li><strong>\u8abf\u6574\u9023\u63a5\u6578\u91cf\uff1a<\/strong>\u6839\u64da\u61c9\u7528\u7684\u4e26\u767c\u9700\u6c42\u8abf\u6574<code>max_connections<\/code>\u7684\u503c\uff0c\u4ee5\u907f\u514d\u9023\u63a5\u6578\u904e\u591a\u5c0e\u81f4\u7684\u6027\u80fd\u4e0b\u964d\u3002<\/li>\n<\/ul>\n<h2 id=\"4-%e5%ae%9a%e6%9c%9f%e6%b8%85%e7%90%86%e6%95%b8%e6%93%9a-ZFARnzwQDP\">4. \u5b9a\u671f\u6e05\u7406\u6578\u64da<\/h2>\n<p>\u96a8\u8457\u6642\u9593\u7684\u63a8\u79fb\uff0c\u6578\u64da\u5eab\u4e2d\u53ef\u80fd\u6703\u7a4d\u7d2f\u5927\u91cf\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u3002\u5b9a\u671f\u6e05\u7406\u904e\u671f\u6216\u4e0d\u518d\u4f7f\u7528\u7684\u6578\u64da\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u522a\u9664\u904e\u671f\u6578\u64da\uff1a<\/p>\n<pre><code>DELETE FROM sessions WHERE last_access &lt; NOW() - INTERVAL 30 DAY;<\/code><\/pre>\n<h2 id=\"5-%e4%bd%bf%e7%94%a8%e6%85%a2%e6%9f%a5%e8%a9%a2%e6%97%a5%e8%aa%8c-ZFARnzwQDP\">5. \u4f7f\u7528\u6162\u67e5\u8a62\u65e5\u8a8c<\/h2>\n<p>\u555f\u7528\u6162\u67e5\u8a62\u65e5\u8a8c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u8b58\u5225\u6027\u80fd\u8f03\u5dee\u7684\u67e5\u8a62\u3002\u901a\u904e\u5206\u6790\u9019\u4e9b\u67e5\u8a62\uff0c\u53ef\u4ee5\u91dd\u5c0d\u6027\u5730\u9032\u884c\u512a\u5316\u3002\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u547d\u4ee4\u555f\u7528\u6162\u67e5\u8a62\u65e5\u8a8c\uff1a<\/p>\n<pre><code>SET GLOBAL slow_query_log = 'ON';<\/code><\/pre>\n<p>\u4e26\u8a2d\u7f6e\u6162\u67e5\u8a62\u7684\u95be\u503c\uff1a<\/p>\n<pre><code>SET GLOBAL long_query_time = 2;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ZFARnzwQDP\">\u7e3d\u7d50<\/h2>\n<p>\u901a\u904e\u4ee5\u4e0a\u5e7e\u500b\u6280\u5de7\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u8abf\u8a66\u548c\u512a\u5316MySQL\u6578\u64da\u5eab\u7684\u6027\u80fd\u3002\u7121\u8ad6\u662f\u4f7f\u7528<code>EXPLAIN<\/code>\u5206\u6790\u67e5\u8a62\uff0c\u9084\u662f\u8abf\u6574MySQL\u7684\u914d\u7f6e\uff0c\u9019\u4e9b\u65b9\u6cd5\u90fd\u80fd\u5e6b\u52a9\u7528\u6236\u63d0\u5347\u6578\u64da\u5eab\u7684\u6548\u7387\u548c\u7a69\u5b9a\u6027\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u89e3\u6c7a\u65b9\u6848\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u7528\u6236\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5be6\u7528\u7684MySQL\u8abf\u8a66\u548c\u512a\u5316\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\uff0c\u89e3\u6c7a\u5e38\u898b\u554f\u984c\uff0c\u8b93\u4f60\u7684\u61c9\u7528\u904b\u884c\u66f4\u6d41\u66a2\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-183452","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/183452","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=183452"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/183452\/revisions"}],"predecessor-version":[{"id":183453,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/183452\/revisions\/183453"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=183452"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=183452"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=183452"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}