{"id":31992,"date":"2025-01-15T14:16:58","date_gmt":"2025-01-15T06:16:58","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=24324"},"modified":"2025-01-15T14:16:58","modified_gmt":"2025-01-15T06:16:58","slug":"%e5%a6%82%e4%bd%95%e9%80%9a%e8%bf%87%e6%95%b0%e6%8d%ae%e5%ba%93%e6%9f%a5%e8%af%a2%e4%bc%98%e5%8c%96%e5%ae%9a%e4%bd%8d%e5%ba%94%e7%94%a8%e6%95%85%e9%9a%9c%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/31992.html","title":{"rendered":"\u5982\u4f55\u901a\u8fc7\u6570\u636e\u5e93\u67e5\u8be2\u4f18\u5316\u5b9a\u4f4d\u5e94\u7528\u6545\u969c\uff1f"},"content":{"rendered":"

\t\t\t\t\n\n

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\u5728\u73b0\u4ee3\u5e94\u7528\u5f00\u53d1\u4e2d\uff0c\u6570\u636e\u5e93\u662f\u6838\u5fc3\u7ec4\u4ef6\u4e4b\u4e00\uff0c\u627f\u8f7d\u7740\u6570\u636e\u5b58\u50a8\u3001\u67e5\u8be2\u548c\u5206\u6790\u7684\u5173\u952e\u4efb\u52a1\u3002\u7136\u800c\uff0c\u968f\u7740\u5e94\u7528\u89c4\u6a21\u7684\u6269\u5927\u548c\u7528\u6237\u91cf\u7684\u589e\u957f\uff0c\u6570\u636e\u5e93\u67e5\u8be2\u6027\u80fd\u95ee\u9898\u9010\u6e10\u6210\u4e3a\u5f71\u54cd\u7cfb\u7edf\u7a33\u5b9a\u6027\u548c\u7528\u6237\u4f53\u9a8c\u7684\u91cd\u8981\u56e0\u7d20\u3002\u5982\u4f55\u901a\u8fc7\u6570\u636e\u5e93\u67e5\u8be2\u4f18\u5316\u5b9a\u4f4d\u5e94\u7528\u6545\u969c\uff1f<\/strong> \u8fd9\u4e00\u95ee\u9898\u4e0d\u4ec5\u5173\u4e4e\u6280\u672f\u7ec6\u8282\uff0c\u66f4\u76f4\u63a5\u5173\u7cfb\u5230\u5e94\u7528\u7684\u53ef\u7528\u6027\u548c\u4e1a\u52a1\u8fde\u7eed\u6027\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8\u5982\u4f55\u901a\u8fc7\u4f18\u5316\u6570\u636e\u5e93\u67e5\u8be2\u6765\u5feb\u901f\u5b9a\u4f4d\u5e76\u89e3\u51b3\u5e94\u7528\u6545\u969c\uff0c\u5e2e\u52a9\u5f00\u53d1\u8005\u548c\u8fd0\u7ef4\u4eba\u5458\u63d0\u5347\u7cfb\u7edf\u6027\u80fd\u3002<\/p>\n\n\n\n\n

\u4e00\u3001\u6570\u636e\u5e93\u67e5\u8be2\u4f18\u5316\u7684\u91cd\u8981\u6027<\/h3>\n\n\n\n\n

\u6570\u636e\u5e93\u67e5\u8be2\u662f\u5e94\u7528\u4e0e\u6570\u636e\u5e93\u4ea4\u4e92\u7684\u6838\u5fc3\u73af\u8282\uff0c\u67e5\u8be2\u6548\u7387\u76f4\u63a5\u5f71\u54cd\u5e94\u7528\u7684\u54cd\u5e94\u901f\u5ea6\u548c\u8d44\u6e90\u6d88\u8017\u3002\u4f4e\u6548\u7684\u67e5\u8be2\u4e0d\u4ec5\u4f1a\u5bfc\u81f4\u5e94\u7528\u6027\u80fd\u4e0b\u964d\uff0c\u8fd8\u53ef\u80fd\u5f15\u53d1\u8fde\u9501\u53cd\u5e94\uff0c\u751a\u81f3\u5bfc\u81f4\u7cfb\u7edf\u5d29\u6e83\u3002<\/strong> \u4f8b\u5982\uff0c\u4e00\u4e2a\u672a\u4f18\u5316\u7684\u590d\u6742\u67e5\u8be2\u53ef\u80fd\u5360\u7528\u5927\u91cfCPU\u548c\u5185\u5b58\u8d44\u6e90\uff0c\u5bfc\u81f4\u6570\u636e\u5e93\u670d\u52a1\u5668\u8d1f\u8f7d\u8fc7\u9ad8\uff0c\u8fdb\u800c\u5f71\u54cd\u5176\u4ed6\u670d\u52a1\u7684\u6b63\u5e38\u8fd0\u884c\u3002<\/p>\n\n\n\n\n

\u901a\u8fc7\u4f18\u5316\u6570\u636e\u5e93\u67e5\u8be2\uff0c\u6211\u4eec\u53ef\u4ee5\u663e\u8457\u51cf\u5c11\u8d44\u6e90\u6d88\u8017\uff0c\u63d0\u5347\u67e5\u8be2\u901f\u5ea6\uff0c\u4ece\u800c\u6539\u5584\u5e94\u7528\u7684\u6574\u4f53\u6027\u80fd\u3002\u66f4\u91cd\u8981\u7684\u662f\uff0c\u4f18\u5316\u67e5\u8be2\u8fd8\u80fd\u5e2e\u52a9\u6211\u4eec\u5feb\u901f\u5b9a\u4f4d\u6545\u969c\u6839\u6e90\uff0c\u907f\u514d\u95ee\u9898\u6269\u5927\u5316\u3002<\/p>\n\n\n\n\n

\u4e8c\u3001\u5e38\u89c1\u6570\u636e\u5e93\u67e5\u8be2\u95ee\u9898\u53ca\u5176\u5f71\u54cd<\/h3>\n\n\n\n\n

\u5728\u5e94\u7528\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0c\u6570\u636e\u5e93\u67e5\u8be2\u95ee\u9898\u53ef\u80fd\u4ee5\u591a\u79cd\u5f62\u5f0f\u51fa\u73b0\uff0c\u4ee5\u4e0b\u662f\u51e0\u79cd\u5e38\u89c1\u7684\u60c5\u51b5\uff1a<\/p>\n\n\n\n\n

    \n\n\n
  1. \u6162\u67e5\u8be2<\/strong>\uff1a\u67d0\u4e9b\u67e5\u8be2\u6267\u884c\u65f6\u95f4\u8fc7\u957f\uff0c\u5bfc\u81f4\u7528\u6237\u8bf7\u6c42\u54cd\u5e94\u5ef6\u8fdf\u3002<\/li>\n\n\n\n\n
  2. \u9ad8\u8d44\u6e90\u6d88\u8017<\/strong>\uff1a\u67e5\u8be2\u5360\u7528\u5927\u91cfCPU\u3001\u5185\u5b58\u6216\u78c1\u76d8I\/O\u8d44\u6e90\uff0c\u5f71\u54cd\u5176\u4ed6\u670d\u52a1\u7684\u6b63\u5e38\u8fd0\u884c\u3002<\/li>\n\n\n\n\n
  3. \u6b7b\u9501<\/strong>\uff1a\u591a\u4e2a\u67e5\u8be2\u540c\u65f6\u7ade\u4e89\u540c\u4e00\u8d44\u6e90\uff0c\u5bfc\u81f4\u6570\u636e\u5e93\u8fdb\u5165\u6b7b\u9501\u72b6\u6001\u3002<\/li>\n\n\n\n\n
  4. \u6570\u636e\u4e0d\u4e00\u81f4<\/strong>\uff1a\u7531\u4e8e\u67e5\u8be2\u903b\u8f91\u9519\u8bef\u6216\u4e8b\u52a1\u7ba1\u7406\u4e0d\u5f53\uff0c\u5bfc\u81f4\u6570\u636e\u51fa\u73b0\u4e0d\u4e00\u81f4\u95ee\u9898\u3002<\/li>\n\n\n<\/ol>\n\n\n\n\n

    \u8fd9\u4e9b\u95ee\u9898\u5982\u679c\u4e0d\u53ca\u65f6\u89e3\u51b3\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5e94\u7528\u6545\u969c\uff0c\u751a\u81f3\u5f15\u53d1\u4e1a\u52a1\u4e2d\u65ad\u3002\u56e0\u6b64\uff0c\u901a\u8fc7\u4f18\u5316\u67e5\u8be2\u6765\u5b9a\u4f4d\u548c\u89e3\u51b3\u8fd9\u4e9b\u95ee\u9898\u81f3\u5173\u91cd\u8981<\/strong>\u3002<\/p>\n\n\n\n\n

    \u4e09\u3001\u6570\u636e\u5e93\u67e5\u8be2\u4f18\u5316\u7684\u6838\u5fc3\u65b9\u6cd5<\/h3>\n\n\n\n\n

    \u8981\u4f18\u5316\u6570\u636e\u5e93\u67e5\u8be2\u5e76\u5b9a\u4f4d\u5e94\u7528\u6545\u969c\uff0c\u53ef\u4ee5\u4ece\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\u5165\u624b\uff1a<\/p>\n\n\n\n\n

    1. \u5206\u6790\u6162\u67e5\u8be2\u65e5\u5fd7<\/strong><\/h4>\n\n\n\n\n

    \u5927\u591a\u6570\u6570\u636e\u5e93\u7cfb\u7edf\uff08\u5982MySQL\u3001PostgreSQL\uff09\u90fd\u652f\u6301\u6162\u67e5\u8be2\u65e5\u5fd7\u529f\u80fd\uff0c\u53ef\u4ee5\u8bb0\u5f55\u6267\u884c\u65f6\u95f4\u8d85\u8fc7\u6307\u5b9a\u9608\u503c\u7684\u67e5\u8be2\u3002\u901a\u8fc7\u5206\u6790\u6162\u67e5\u8be2\u65e5\u5fd7\uff0c\u6211\u4eec\u53ef\u4ee5\u5feb\u901f\u5b9a\u4f4d\u54ea\u4e9b\u67e5\u8be2\u662f\u6027\u80fd\u74f6\u9888\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5178\u578b\u7684\u6162\u67e5\u8be2\u65e5\u5fd7\u6761\u76ee\uff1a<\/p>\n\n\n\n\n

    # Time: 2023-10-01T12:34:56.789Z
    \n# User@Host: root[root] @ localhost []
    \n# Query_time: 5.123456  Lock_time: 0.000123 Rows_sent: 10  Rows_examined: 1000000
    \nSELECT * FROM orders WHERE status = 'pending' AND created_at > '2023-01-01';
    \n<\/code><\/pre>\n\n\n\n\n
    \u4ece\u65e5\u5fd7\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u8fd9\u6761\u67e5\u8be2\u626b\u63cf\u4e86100\u4e07\u884c\u6570\u636e\uff0c\u4f46\u53ea\u8fd4\u56de\u4e8610\u884c\uff0c\u663e\u7136\u5b58\u5728\u4f18\u5316\u7a7a\u95f4\u3002<\/p>\n\n\n\n\n
    2. \u4f7f\u7528\u7d22\u5f15\u4f18\u5316\u67e5\u8be2<\/strong><\/h4>\n\n\n\n\n
    \u7d22\u5f15\u662f\u63d0\u5347\u67e5\u8be2\u6027\u80fd\u7684\u5173\u952e\u5de5\u5177\u3002\u901a\u8fc7\u4e3a\u5e38\u7528\u67e5\u8be2\u5b57\u6bb5\u521b\u5efa\u7d22\u5f15\uff0c\u53ef\u4ee5\u663e\u8457\u51cf\u5c11\u6570\u636e\u626b\u63cf\u91cf\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8e\u4e0a\u9762\u7684\u67e5\u8be2\uff0c\u53ef\u4ee5\u4e3astatus<\/code>\u548ccreated_at<\/code>\u5b57\u6bb5\u521b\u5efa\u590d\u5408\u7d22\u5f15\uff1a<\/p>\n\n\n\n\n
    CREATE INDEX idx_status_created_at ON orders(status, created_at);
    \n<\/code><\/pre>\n\n\n\n\n
    \u521b\u5efa\u7d22\u5f15\u540e\uff0c\u6570\u636e\u5e93\u53ef\u4ee5\u76f4\u63a5\u5b9a\u4f4d\u5230\u7b26\u5408\u6761\u4ef6\u7684\u8bb0\u5f55\uff0c\u800c\u4e0d\u9700\u8981\u626b\u63cf\u6574\u4e2a\u8868\u3002<\/p>\n\n\n\n\n
    3. \u4f18\u5316\u67e5\u8be2\u8bed\u53e5<\/strong><\/h4>\n\n\n\n\n
    \u6709\u65f6\uff0c\u67e5\u8be2\u8bed\u53e5\u672c\u8eab\u53ef\u80fd\u5b58\u5728\u6027\u80fd\u95ee\u9898\u3002\u4f8b\u5982\uff0c\u4f7f\u7528SELECT *<\/code>\u4f1a\u5bfc\u81f4\u6570\u636e\u5e93\u8fd4\u56de\u6240\u6709\u5b57\u6bb5\uff0c\u5373\u4f7f\u6709\u4e9b\u5b57\u6bb5\u5e76\u4e0d\u9700\u8981\u3002\u901a\u8fc7\u53ea\u9009\u62e9\u5fc5\u8981\u7684\u5b57\u6bb5\uff0c\u53ef\u4ee5\u51cf\u5c11\u6570\u636e\u4f20\u8f93\u91cf\u3002\u6b64\u5916\uff0c\u907f\u514d\u5728\u67e5\u8be2\u4e2d\u4f7f\u7528\u590d\u6742\u7684\u5b50\u67e5\u8be2\u6216\u5d4c\u5957\u67e5\u8be2\uff0c\u4e5f\u53ef\u4ee5\u63d0\u5347\u6027\u80fd\u3002<\/p>\n\n\n\n\n
    4. \u76d1\u63a7\u6570\u636e\u5e93\u6027\u80fd<\/strong><\/h4>\n\n\n\n\n
    \u901a\u8fc7\u5b9e\u65f6\u76d1\u63a7\u6570\u636e\u5e93\u6027\u80fd\u6307\u6807\uff08\u5982CPU\u4f7f\u7528\u7387\u3001\u5185\u5b58\u5360\u7528\u3001\u78c1\u76d8I\/O\u7b49\uff09\uff0c\u53ef\u4ee5\u53ca\u65f6\u53d1\u73b0\u6f5c\u5728\u95ee\u9898\u3002\u4f8b\u5982\uff0c\u5982\u679c\u53d1\u73b0\u67d0\u4e2a\u67e5\u8be2\u5bfc\u81f4CPU\u4f7f\u7528\u7387\u98d9\u5347\uff0c\u53ef\u4ee5\u7acb\u5373\u91c7\u53d6\u63aa\u65bd\u4f18\u5316\u8be5\u67e5\u8be2\u3002<\/p>\n\n\n\n\n
    5. \u4f7f\u7528\u6570\u636e\u5e93\u6027\u80fd\u5206\u6790\u5de5\u5177<\/strong><\/h4>\n\n\n\n\n
    \u8bb8\u591a\u6570\u636e\u5e93\u7cfb\u7edf\u63d0\u4f9b\u4e86\u6027\u80fd\u5206\u6790\u5de5\u5177\uff0c\u5982MySQL\u7684EXPLAIN<\/code>\u547d\u4ee4\u3001PostgreSQL\u7684EXPLAIN ANALYZE<\/code>\u547d\u4ee4\u7b49\u3002\u8fd9\u4e9b\u5de5\u5177\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5206\u6790\u67e5\u8be2\u7684\u6267\u884c\u8ba1\u5212\uff0c\u627e\u51fa\u6027\u80fd\u74f6\u9888\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n\n
    EXPLAIN SELECT * FROM orders WHERE status = 'pending' AND created_at > '2023-01-01';
    \n<\/code><\/pre>\n\n\n\n\n
    \u901a\u8fc7\u5206\u6790\u6267\u884c\u8ba1\u5212\uff0c\u6211\u4eec\u53ef\u4ee5\u4e86\u89e3\u67e5\u8be2\u662f\u5426\u4f7f\u7528\u4e86\u7d22\u5f15\u3001\u626b\u63cf\u4e86\u591a\u5c11\u884c\u6570\u636e\u7b49\u4fe1\u606f\u3002<\/p>\n\n\n\n\n
    \u56db\u3001\u901a\u8fc7\u67e5\u8be2\u4f18\u5316\u5b9a\u4f4d\u5e94\u7528\u6545\u969c\u7684\u5b9e\u6218\u6848\u4f8b<\/h3>\n\n\n\n\n
    \u4ee5\u4e0b\u662f\u4e00\u4e2a\u5b9e\u9645\u6848\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u901a\u8fc7\u67e5\u8be2\u4f18\u5316\u5b9a\u4f4d\u5e76\u89e3\u51b3\u5e94\u7528\u6545\u969c\uff1a<\/p>\n\n\n\n\n
    1. \u95ee\u9898\u63cf\u8ff0<\/strong><\/h4>\n\n\n\n\n
    \u67d0\u7535\u5546\u7f51\u7ad9\u5728\u4fc3\u9500\u6d3b\u52a8\u671f\u95f4\u51fa\u73b0\u9875\u9762\u52a0\u8f7d\u7f13\u6162\u7684\u95ee\u9898\uff0c\u7528\u6237\u6295\u8bc9\u589e\u591a\u3002\u521d\u6b65\u6392\u67e5\u53d1\u73b0\uff0c\u6570\u636e\u5e93\u670d\u52a1\u5668\u7684CPU\u4f7f\u7528\u7387\u63a5\u8fd1100%\uff0c\u78c1\u76d8I\/O\u4e5f\u5f02\u5e38\u9ad8\u3002<\/p>\n\n\n\n\n
    2. \u5206\u6790\u8fc7\u7a0b<\/strong><\/h4>\n\n\n\n\n
      \n\n\n
    • \u67e5\u770b\u6162\u67e5\u8be2\u65e5\u5fd7<\/strong>\uff1a\u53d1\u73b0\u4e00\u6761\u67e5\u8be2\u6267\u884c\u65f6\u95f4\u8d85\u8fc710\u79d2\uff0c\u626b\u63cf\u4e86\u6570\u767e\u4e07\u884c\u6570\u636e\u3002<\/li>\n\n\n\n\n
    • \u4f7f\u7528EXPLAIN<\/code>\u5206\u6790\u67e5\u8be2<\/strong>\uff1a\u53d1\u73b0\u67e5\u8be2\u672a\u4f7f\u7528\u7d22\u5f15\uff0c\u5bfc\u81f4\u5168\u8868\u626b\u63cf\u3002<\/li>\n\n\n\n\n
    • \u4f18\u5316\u67e5\u8be2<\/strong>\uff1a\u4e3a\u76f8\u5173\u5b57\u6bb5\u521b\u5efa\u7d22\u5f15\uff0c\u5e76\u91cd\u5199\u67e5\u8be2\u8bed\u53e5\u4ee5\u51cf\u5c11\u6570\u636e\u626b\u63cf\u91cf\u3002<\/li>\n\n\n<\/ul>\n\n\n\n\n
      3. \u4f18\u5316\u6548\u679c<\/strong><\/h4>\n\n\n\n\n
      \u4f18\u5316\u540e\uff0c\u67e5\u8be2\u6267\u884c\u65f6\u95f4\u4ece10\u79d2\u964d\u4f4e\u52300.1\u79d2\uff0c\u6570\u636e\u5e93\u670d\u52a1\u5668\u7684CPU\u4f7f\u7528\u7387\u6062\u590d\u6b63\u5e38\uff0c\u9875\u9762\u52a0\u8f7d\u901f\u5ea6\u663e\u8457\u63d0\u5347\u3002<\/p>\n\n\n\n\n
      \u4e94\u3001\u6570\u636e\u5e93\u67e5\u8be2\u4f18\u5316\u7684\u6700\u4f73\u5b9e\u8df5<\/h3>\n\n\n\n\n
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