{"id":195047,"date":"2024-11-13T11:45:20","date_gmt":"2024-11-13T03:45:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/195047\/"},"modified":"2024-11-13T11:45:21","modified_gmt":"2024-11-13T03:45:21","slug":"%e5%84%aa%e5%8c%96mysql%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a23%e5%80%8b%e5%a5%bd%e7%94%a8%e6%96%b9%e6%a1%88","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/195047\/","title":{"rendered":"\u512a\u5316MySQL\u6578\u64da\u5eab\u67e5\u8a623\u500b\u597d\u7528\u65b9\u6848"},"content":{"rendered":"<h1 id=\"%e5%84%aa%e5%8c%96mysql%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a23%e5%80%8b%e5%a5%bd%e7%94%a8%e6%96%b9%e6%a1%88-xLYfJlPpKs\">\u512a\u5316MySQL\u6578\u64da\u5eab\u67e5\u8a623\u500b\u597d\u7528\u65b9\u6848<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\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\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u7db2\u7ad9\u548c\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u7136\u800c\uff0c\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u67e5\u8a62\u6027\u80fd\u53ef\u80fd\u6703\u53d7\u5230\u5f71\u97ff\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u4e09\u500b\u6709\u6548\u7684\u65b9\u6848\u4f86\u512a\u5316MySQL\u6578\u64da\u5eab\u67e5\u8a62\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u3002<\/p>\n<h2 id=\"1-%e4%bd%bf%e7%94%a8%e7%b4%a2%e5%bc%95%e4%be%86%e5%8a%a0%e9%80%9f%e6%9f%a5%e8%a9%a2-xLYfJlPpKs\">1. \u4f7f\u7528\u7d22\u5f15\u4f86\u52a0\u901f\u67e5\u8a62<\/h2>\n<p>\u7d22\u5f15\u662f\u6578\u64da\u5eab\u4e2d\u4e00\u7a2e\u91cd\u8981\u7684\u6578\u64da\u7d50\u69cb\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\u3002\u901a\u904e\u5728\u8868\u7684\u67d0\u4e9b\u5217\u4e0a\u5275\u5efa\u7d22\u5f15\uff0cMySQL\u53ef\u4ee5\u66f4\u5feb\u5730\u5b9a\u4f4d\u5230\u6240\u9700\u7684\u6578\u64da\uff0c\u800c\u4e0d\u5fc5\u6383\u63cf\u6574\u500b\u8868\u3002<\/p>\n<ul>\n<li><strong>\u55ae\u5217\u7d22\u5f15\uff1a<\/strong>\u5c0d\u65bc\u7d93\u5e38\u7528\u65bc\u67e5\u8a62\u7684\u55ae\u4e00\u5217\uff0c\u53ef\u4ee5\u5275\u5efa\u55ae\u5217\u7d22\u5f15\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u4e00\u500b\u7528\u6236\u8868\uff0c\u5982\u679c\u7d93\u5e38\u6839\u64da\u7528\u6236ID\u67e5\u8a62\uff0c\u53ef\u4ee5\u9019\u6a23\u5275\u5efa\u7d22\u5f15\uff1a<\/li>\n<pre><code>CREATE INDEX idx_user_id ON users(user_id);<\/code><\/pre>\n<li><strong>\u8907\u5408\u7d22\u5f15\uff1a<\/strong>\u7576\u67e5\u8a62\u6d89\u53ca\u591a\u500b\u5217\u6642\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u8907\u5408\u7d22\u5f15\u3002\u9019\u6a23\u53ef\u4ee5\u5728\u4e00\u6b21\u67e5\u8a62\u4e2d\u540c\u6642\u5229\u7528\u591a\u500b\u5217\u7684\u7d22\u5f15\u3002\u4f8b\u5982\uff1a<\/li>\n<pre><code>CREATE INDEX idx_user_name_email ON users(name, email);<\/code><\/pre>\n<\/ul>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u96d6\u7136\u7d22\u5f15\u53ef\u4ee5\u52a0\u901f\u67e5\u8a62\uff0c\u4f46\u904e\u591a\u7684\u7d22\u5f15\u6703\u5f71\u97ff\u6578\u64da\u7684\u63d2\u5165\u548c\u66f4\u65b0\u6027\u80fd\uff0c\u56e0\u6b64\u61c9\u6839\u64da\u5be6\u969b\u9700\u6c42\u5408\u7406\u8a2d\u7f6e\u7d22\u5f15\u3002<\/p>\n<h2 id=\"2-%e5%84%aa%e5%8c%96%e6%9f%a5%e8%a9%a2%e8%aa%9e%e5%8f%a5-xLYfJlPpKs\">2. \u512a\u5316\u67e5\u8a62\u8a9e\u53e5<\/h2>\n<p>\u67e5\u8a62\u8a9e\u53e5\u7684\u5beb\u6cd5\u5c0d\u65bc\u6027\u80fd\u5f71\u97ff\u4e5f\u975e\u5e38\u5927\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u512a\u5316\u67e5\u8a62\u8a9e\u53e5\u7684\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li><strong>\u907f\u514dSELECT *\uff1a<\/strong>\u4f7f\u7528SELECT *\u6703\u5c0e\u81f4\u67e5\u8a62\u8fd4\u56de\u6240\u6709\u5217\uff0c\u9019\u6a23\u6703\u589e\u52a0\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u50b3\u8f38\u3002\u61c9\u8a72\u53ea\u9078\u64c7\u9700\u8981\u7684\u5217\uff0c\u4f8b\u5982\uff1a<\/li>\n<pre><code>SELECT name, email FROM users WHERE user_id = 1;<\/code><\/pre>\n<li><strong>\u4f7f\u7528JOIN\u800c\u975e\u5b50\u67e5\u8a62\uff1a<\/strong>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528JOIN\u53ef\u4ee5\u6bd4\u5b50\u67e5\u8a62\u66f4\u9ad8\u6548\u3002\u4f8b\u5982\uff1a<\/li>\n<pre><code>SELECT u.name, o.order_date \nFROM users u \nJOIN orders o ON u.user_id = o.user_id \nWHERE u.user_id = 1;<\/code><\/pre>\n<li><strong>\u4f7f\u7528LIMIT\u9650\u5236\u7d50\u679c\u96c6\uff1a<\/strong>\u5982\u679c\u53ea\u9700\u8981\u524d\u5e7e\u689d\u8a18\u9304\uff0c\u53ef\u4ee5\u4f7f\u7528LIMIT\u4f86\u9650\u5236\u8fd4\u56de\u7684\u7d50\u679c\u96c6\u5927\u5c0f\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u6578\u64da\u7684\u8655\u7406\u91cf\u3002<\/li>\n<pre><code>SELECT name FROM users ORDER BY created_at DESC LIMIT 10;<\/code><\/pre>\n<\/ul>\n<h2 id=\"3-%e8%aa%bf%e6%95%b4mysql%e9%85%8d%e7%bd%ae%e5%8f%83%e6%95%b8-xLYfJlPpKs\">3. \u8abf\u6574MySQL\u914d\u7f6e\u53c3\u6578<\/h2>\n<p>MySQL\u7684\u6027\u80fd\u4e5f\u53d7\u5230\u5176\u914d\u7f6e\u53c3\u6578\u7684\u5f71\u97ff\u3002\u6839\u64da\u61c9\u7528\u7684\u9700\u6c42\uff0c\u8abf\u6574\u4e00\u4e9b\u95dc\u9375\u7684\u914d\u7f6e\u53c3\u6578\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6027\u80fd\uff1a<\/p>\n<ul>\n<li><strong>innodb_buffer_pool_size\uff1a<\/strong>\u9019\u500b\u53c3\u6578\u6c7a\u5b9a\u4e86InnoDB\u5b58\u5132\u5f15\u64ce\u7528\u65bc\u7de9\u5b58\u6578\u64da\u548c\u7d22\u5f15\u7684\u5167\u5b58\u5927\u5c0f\u3002\u901a\u5e38\u5efa\u8b70\u5c07\u5176\u8a2d\u7f6e\u70ba\u53ef\u7528\u5167\u5b58\u768470%-80%\u3002<\/li>\n<li><strong>query_cache_size\uff1a<\/strong>\u67e5\u8a62\u7de9\u5b58\u53ef\u4ee5\u63d0\u9ad8\u91cd\u8907\u67e5\u8a62\u7684\u6027\u80fd\uff0c\u4f46\u5728\u9ad8\u5beb\u5165\u7684\u74b0\u5883\u4e2d\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u6839\u64da\u5be6\u969b\u60c5\u6cc1\u6c7a\u5b9a\u662f\u5426\u555f\u7528\u3002<\/li>\n<li><strong>max_connections\uff1a<\/strong>\u9019\u500b\u53c3\u6578\u6c7a\u5b9a\u4e86\u540c\u6642\u9023\u63a5\u5230MySQL\u7684\u6700\u5927\u5ba2\u6236\u7aef\u6578\u91cf\u3002\u6839\u64da\u61c9\u7528\u7684\u9700\u6c42\u9032\u884c\u8abf\u6574\uff0c\u4ee5\u907f\u514d\u9023\u63a5\u6578\u904e\u591a\u5c0e\u81f4\u7684\u6027\u80fd\u74f6\u9838\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-xLYfJlPpKs\">\u7e3d\u7d50<\/h2>\n<p>\u512a\u5316MySQL\u6578\u64da\u5eab\u67e5\u8a62\u662f\u63d0\u9ad8\u61c9\u7528\u6027\u80fd\u7684\u91cd\u8981\u6b65\u9a5f\u3002\u901a\u904e\u4f7f\u7528\u7d22\u5f15\u3001\u512a\u5316\u67e5\u8a62\u8a9e\u53e5\u4ee5\u53ca\u8abf\u6574MySQL\u914d\u7f6e\u53c3\u6578\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u5347\u67e5\u8a62\u6548\u7387\u3002\u9019\u4e9b\u65b9\u6cd5\u4e0d\u50c5\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u89e3\u6c7a\u6027\u80fd\u554f\u984c\uff0c\u9084\u80fd\u70ba\u7528\u6236\u63d0\u4f9b\u66f4\u6d41\u66a2\u7684\u9ad4\u9a57\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u9700\u6c42\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\u63d0\u5347\u60a8\u7684\u61c9\u7528\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u4e09\u500b\u6709\u6548\u65b9\u6848\u4f86\u512a\u5316MySQL\u6578\u64da\u5eab\u67e5\u8a62\uff0c\u63d0\u5347\u6027\u80fd\u8207\u6548\u7387\uff0c\u8b93\u6578\u64da\u8655\u7406\u66f4\u5feb\u901f\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-195047","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/195047","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=195047"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/195047\/revisions"}],"predecessor-version":[{"id":195048,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/195047\/revisions\/195048"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=195047"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=195047"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=195047"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}