{"id":22247,"date":"2024-02-05T12:04:20","date_gmt":"2024-02-05T12:04:20","guid":{"rendered":"https:\/\/server.hk\/blog\/22247\/"},"modified":"2024-09-12T07:36:16","modified_gmt":"2024-09-12T07:36:16","slug":"optimizing-database-performance-on-your-usa-vps-query-optimization-and-indexing","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/22247\/","title":{"rendered":"\u60a8\u7684\u9999\u6e2fVPS\u4e0a\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\uff1a\u67e5\u8a62\u512a\u5316\u548c\u7d22\u5f15"},"content":{"rendered":"<h1 id=\"optimizing-database-performance-on-your-usa-vps-query-optimization-and-indexing-sMIjaVWblT\">\u5728\u60a8\u7684\u9999\u6e2fVPS\u4e0a\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\uff1a\u67e5\u8a62\u512a\u5316\u548c\u7d22\u5f15<\/h1>\n<p>\u4f5c\u70ba\u7db2\u7ad9\u64c1\u6709\u8005\uff0c\u78ba\u4fdd\u60a8\u7684\u6578\u64da\u5eab\u7684\u6700\u4f73\u6027\u80fd\u5c0d\u60a8\u7684\u5728\u7dda\u696d\u52d9\u7684\u6210\u529f\u81f3\u95dc\u91cd\u8981\u3002\u6162\u7684\u6578\u64da\u5eab\u67e5\u8a62\u53ef\u80fd\u5c0e\u81f4\u7528\u6236\u9ad4\u9a57\u5dee\uff0c\u8f49\u5316\u7387\u964d\u4f4e\uff0c\u751a\u81f3\u640d\u5931\u6536\u5165\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u5c07\u63a2\u8a0e\u67e5\u8a62\u512a\u5316\u548c\u7d22\u5f15\u5728\u63d0\u9ad8\u60a8\u7684\u9999\u6e2fVPS\u4e3b\u6a5f\u7684\u6578\u64da\u5eab\u6027\u80fd\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"understanding-query-optimization-sMIjaVWblT\">\u7406\u89e3\u67e5\u8a62\u512a\u5316<\/h2>\n<p>\u67e5\u8a62\u512a\u5316\u662f\u63d0\u9ad8\u6578\u64da\u5eab\u67e5\u8a62\u6548\u7387\u548c\u901f\u5ea6\u7684\u904e\u7a0b\u3002\u7576\u57f7\u884c\u67e5\u8a62\u6642\uff0c\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08DBMS\uff09\u6703\u5206\u6790\u67e5\u8a62\u4e26\u78ba\u5b9a\u6aa2\u7d22\u6240\u9700\u6578\u64da\u7684\u6700\u6709\u6548\u65b9\u5f0f\u3002\u901a\u904e\u512a\u5316\u60a8\u7684\u67e5\u8a62\uff0c\u60a8\u53ef\u4ee5\u986f\u8457\u964d\u4f4e\u97ff\u61c9\u6642\u9593\u4e26\u63d0\u9ad8\u6574\u9ad4\u6578\u64da\u5eab\u6027\u80fd\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u95dc\u9375\u7684\u67e5\u8a62\u512a\u5316\u7b56\u7565\uff1a<\/p>\n<h3 id=\"1-use-indexes-sMIjaVWblT\">1. \u4f7f\u7528\u7d22\u5f15<\/h3>\n<p>\u7d22\u5f15\u662f\u63d0\u9ad8\u6578\u64da\u5eab\u8868\u6aa2\u7d22\u64cd\u4f5c\u901f\u5ea6\u7684\u6578\u64da\u7d50\u69cb\u3002\u5b83\u5011\u8207\u66f8\u7684\u7d22\u5f15\u76f8\u4f3c\uff0c\u5141\u8a31DBMS\u5feb\u901f\u5b9a\u4f4d\u6240\u9700\u7684\u6578\u64da\u3002\u901a\u904e\u5728\u7d93\u5e38\u67e5\u8a62\u7684\u5217\u4e0a\u5275\u5efa\u7d22\u5f15\uff0c\u60a8\u53ef\u4ee5\u5927\u5e45\u63d0\u9ad8\u67e5\u8a62\u7684\u57f7\u884c\u6642\u9593\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u6709\u4e00\u500b\u5ba2\u6236\u6578\u64da\u8868\uff0c\u4e26\u7d93\u5e38\u6839\u64da\u4ed6\u5011\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u641c\u5c0b\u5ba2\u6236\uff0c\u5275\u5efa\u96fb\u5b50\u90f5\u4ef6\u5217\u7684\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6b64\u985e\u67e5\u8a62\u7684\u6027\u80fd\u3002<\/p>\n<h3 id=\"2-avoid-select-statements-sMIjaVWblT\">2. \u907f\u514d\u4f7f\u7528 SELECT * \u8a9e\u53e5<\/h3>\n<p>\u5728\u7de8\u5beb\u67e5\u8a62\u6642\uff0c\u901a\u5e38\u4f7f\u7528\u661f\u865f (*) \u7b26\u865f\u5f9e\u8868\u4e2d\u9078\u64c7\u6240\u6709\u5217\u3002\u4f46\u662f\uff0c\u9019\u53ef\u80fd\u6703\u5c0d\u6027\u80fd\u7522\u751f\u8ca0\u9762\u5f71\u97ff\uff0c\u7279\u5225\u662f\u7576\u8868\u5305\u542b\u5927\u91cf\u7684\u5217\u6216\u8005\u6aa2\u7d22\u4e86\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u3002<\/p>\n<p>\u76f8\u53cd\uff0c\u61c9\u5728\u60a8\u7684 SELECT \u8a9e\u53e5\u4e2d\u660e\u78ba\u6307\u5b9a\u60a8\u9700\u8981\u7684\u5217\u3002\u9019\u6e1b\u5c11\u4e86\u6578\u64da\u5eab\u8207\u61c9\u7528\u7a0b\u5e8f\u4e4b\u9593\u50b3\u8f38\u7684\u6578\u64da\u91cf\uff0c\u5f9e\u800c\u52a0\u5feb\u4e86\u67e5\u8a62\u57f7\u884c\u901f\u5ea6\u3002<\/p>\n<h3 id=\"3-optimize-join-operations-sMIjaVWblT\">3. \u512a\u5316 JOIN \u64cd\u4f5c<\/h3>\n<p>JOIN \u64cd\u4f5c\u7528\u65bc\u7d44\u5408\u4f86\u81ea\u591a\u500b\u8868\u7684\u6578\u64da\u3002\u7136\u800c\uff0c\u512a\u5316\u4e0d\u4f73\u7684 JOIN \u53ef\u4ee5\u986f\u8457\u5f71\u97ff\u6578\u64da\u5eab\u6027\u80fd\u3002\u8981\u512a\u5316 JOIN \u64cd\u4f5c\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u7528\u65bc\u9023\u63a5\u7684\u5217\u5df2\u7d93\u5efa\u7acb\u4e86\u7d22\u5f15\u3002<\/li>\n<li>\u6839\u64da\u60a8\u7684\u6578\u64da\u9700\u6c42\uff0c\u4f7f\u7528\u9069\u7576\u7684 JOIN \u985e\u578b\uff08\u4f8b\u5982\uff0cINNER JOIN, LEFT JOIN\uff09\u3002<\/li>\n<li>\u5728\u9069\u7576\u7684\u60c5\u6cc1\u4e0b\uff0c\u901a\u904e\u5c0d\u60a8\u7684\u6578\u64da\u5eab\u6a21\u5f0f\u9032\u884c\u975e\u6b63\u898f\u5316\u4f86\u6700\u5c0f\u5316 JOIN \u64cd\u4f5c\u7684\u6578\u91cf\u3002<\/li>\n<\/ul>\n<h3 id=\"4-limit-the-result-set-sMIjaVWblT\">4. \u9650\u5236\u7d50\u679c\u96c6<\/h3>\n<p>\u5982\u679c\u60a8\u7684\u67e5\u8a62\u8fd4\u56de\u5927\u91cf\u884c\uff0c\u8acb\u8003\u616e\u4f7f\u7528 LIMIT \u5b50\u53e5\u4f86\u5c07\u7d50\u679c\u96c6\u9650\u5236\u70ba\u50c5\u5fc5\u8981\u7684\u884c\u3002\u9019\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u7279\u5225\u662f\u8207\u9069\u7576\u7684\u7d22\u5f15\u4e00\u8d77\u4f7f\u7528\u3002<\/p>\n<h2 id=\"conclusion-sMIjaVWblT\">\u7e3d\u7d50<\/h2>\n<p>\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\u5c0d\u65bc\u78ba\u4fdd\u4e00\u500b\u5feb\u901f\u4e14\u97ff\u61c9\u654f\u6377\u7684\u7db2\u7ad9\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u5be6\u65bd\u67e5\u8a62\u512a\u5316\u6280\u8853\uff0c\u5982\u4f7f\u7528\u7d22\u5f15\uff0c\u907f\u514d SELECT * \u8a9e\u53e5\uff0c\u512a\u5316 JOIN \u64cd\u4f5c\uff0c\u4e26\u9650\u5236\u7d50\u679c\u96c6\uff0c\u60a8\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u60a8\u7684\u9999\u6e2fVPS\u4e3b\u6a5f\u4e0a\u7684\u6578\u64da\u5eab\u6027\u80fd\u3002<\/p>\n<p>\u5728 Server.HK\uff0c\u6211\u5011\u4e86\u89e3\u4e00\u500b\u9ad8\u6548\u6578\u64da\u5eab\u5c0d\u60a8\u7684\u5728\u7dda\u696d\u52d9\u7684\u91cd\u8981\u6027\u3002\u901a\u904e\u6211\u5011\u53ef\u9760\u4e14\u53ef\u4f38\u7e2e\u7684VPS\u4e3b\u6a5f\u89e3\u6c7a\u65b9\u6848\uff0c\u60a8\u53ef\u4ee5\u9ad4\u9a57\u5230\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\u7684\u597d\u8655\u3002\u806f\u7e6b\u6211\u5011\u4eca\u5929\u5c31\u4e86\u89e3\u66f4\u591a\u6709\u95dc\u6211\u5011\u7684<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS\u4e3b\u6a5f<\/a>\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u60a8\u7684\u9999\u6e2fVPS\u4e0a\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4927],"tags":[],"class_list":["post-22247","post","type-post","status-publish","format-standard","hentry","category-4927"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/22247","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=22247"}],"version-history":[{"count":2,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/22247\/revisions"}],"predecessor-version":[{"id":23115,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/22247\/revisions\/23115"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=22247"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=22247"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=22247"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}