{"id":34354,"date":"2025-04-29T10:38:06","date_gmt":"2025-04-29T02:38:06","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/34354.html"},"modified":"2025-04-29T10:38:06","modified_gmt":"2025-04-29T02:38:06","slug":"%e8%a7%a3%e8%af%bb%e5%92%8c%e5%88%86%e6%9e%90mysql%e6%80%a7%e8%83%bd%e6%95%b0%e6%8d%ae%e6%97%b6%ef%bc%8c%e5%a6%82%e4%bd%95%e7%a1%ae%e5%ae%9a%e6%80%a7%e8%83%bd%e7%93%b6%e9%a2%88%e7%9a%84%e5%85%b7","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/34354.html","title":{"rendered":"\u89e3\u8bfb\u548c\u5206\u6790mysql\u6027\u80fd\u6570\u636e\u65f6\uff0c\u5982\u4f55\u786e\u5b9a\u6027\u80fd\u74f6\u9888\u7684\u5177\u4f53\u4f4d\u7f6e\uff1f"},"content":{"rendered":"<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>\u524d\u8a00<\/li>\n<li>\u73af\u5883\u914d\u7f6e<\/li>\n<li>\u4ece\u67e5\u8be2\u6027\u80fd\u6570\u636e\u786e\u5b9a\u74f6\u9888<\/li>\n<li>\n<ul>\n<li>\u6162\u67e5\u8be2\u65e5\u5fd7<\/li>\n<li>EXPLAIN \u5206\u6790<\/li>\n<\/ul>\n<\/li>\n<li>\u4ece\u7cfb\u7edf\u8d44\u6e90\u4f7f\u7528\u60c5\u51b5\u786e\u5b9a\u74f6\u9888<\/li>\n<li>\n<ul>\n<li>CPU \u4f7f\u7528\u7387<\/li>\n<li>\u5185\u5b58\u4f7f\u7528\u60c5\u51b5<\/li>\n<li>\u78c1\u76d8 I\/O \u6027\u80fd<\/li>\n<\/ul>\n<\/li>\n<li>\u4ece\u6570\u636e\u5e93\u5185\u90e8\u72b6\u6001\u786e\u5b9a\u74f6\u9888<\/li>\n<li>\n<ul>\n<li>\u9501\u7b49\u5f85\u60c5\u51b5<\/li>\n<li>\u7f13\u51b2\u6c60\u547d\u4e2d\u7387<\/li>\n<li>\u5e76\u53d1\u8fde\u63a5\u6570<\/li>\n<li>\u4e8b\u52a1\u5904\u7406<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h2>\u524d\u8a00<\/h2>\n<p>\u5728\u89e3\u8bfb\u548c\u5206\u6790 MySQL \u6027\u80fd\u6570\u636e\u65f6&#xff0c;\u8981\u786e\u5b9a\u6027\u80fd\u74f6\u9888\u7684\u5177\u4f53\u4f4d\u7f6e&#xff0c;\u53ef\u4ee5\u4ece\u591a\u4e2a\u65b9\u9762\u5165\u624b&#xff0c;\u4ee5\u4e0b\u662f\u8be6\u7ec6\u7684\u65b9\u6cd5&#xff1a;<\/p>\n<hr \/>\n<h2>\u73af\u5883\u914d\u7f6e<\/h2>\n<p>MySQL8.0 \u8d85\u8be6\u7ec6\u5b89\u88c5\u914d\u7f6e\u6559\u7a0b&#xff08;\u9644\u5b89\u88c5\u5305&#xff09;&#xff1a;https:\/\/blog.csdn.net\/u014164303\/article\/details\/145493332<\/p>\n<h2>\u4ece\u67e5\u8be2\u6027\u80fd\u6570\u636e\u786e\u5b9a\u74f6\u9888<\/h2>\n<h3>\u6162\u67e5\u8be2\u65e5\u5fd7<\/h3>\n<ul>\n<li>\u5b9a\u4f4d\u957f\u8017\u65f6\u67e5\u8be2&#xff1a;\u6162\u67e5\u8be2\u65e5\u5fd7\u8bb0\u5f55\u4e86\u6267\u884c\u65f6\u95f4\u8d85\u8fc7\u6307\u5b9a\u9608\u503c\u7684\u67e5\u8be2\u3002\u901a\u8fc7\u5206\u6790\u8fd9\u4e9b\u6162\u67e5\u8be2&#xff0c;\u80fd\u76f4\u63a5\u627e\u51fa\u6267\u884c\u65f6\u95f4\u957f\u7684\u67e5\u8be2\u8bed\u53e5\u3002\u4f8b\u5982&#xff0c;\u67d0\u7535\u5546\u7cfb\u7edf\u7684\u6162\u67e5\u8be2\u65e5\u5fd7\u663e\u793a \u201c\u67e5\u8be2\u70ed\u95e8\u5546\u54c1\u8be6\u60c5\u201d \u7684\u8bed\u53e5\u8017\u65f6\u4e45&#xff0c;\u8fd9\u53ef\u80fd\u662f\u6027\u80fd\u74f6\u9888\u6240\u5728\u3002<\/li>\n<li>\u5206\u6790\u67e5\u8be2\u590d\u6742\u5ea6&#xff1a;\u67e5\u770b\u6162\u67e5\u8be2\u7684\u8bed\u53e5\u7ed3\u6784&#xff0c;\u82e5\u5305\u542b\u5927\u91cf\u5b50\u67e5\u8be2\u3001\u590d\u6742\u7684\u8fde\u63a5\u64cd\u4f5c\u6216\u5168\u8868\u626b\u63cf&#xff0c;\u5f88\u53ef\u80fd\u662f\u5bfc\u81f4\u6027\u80fd\u95ee\u9898\u7684\u539f\u56e0\u3002\u6bd4\u5982&#xff0c;\u4e00\u4e2a\u67e5\u8be2\u6d89\u53ca\u591a\u4e2a\u8868\u7684\u5d4c\u5957\u5b50\u67e5\u8be2&#xff0c;\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u7684\u5904\u7406\u8d1f\u62c5\u3002<\/li>\n<\/ul>\n<h3>EXPLAIN \u5206\u6790<\/h3>\n<ul>\n<li>\u67e5\u770b\u8bbf\u95ee\u7c7b\u578b&#xff1a;\u901a\u8fc7 EXPLAIN \u547d\u4ee4\u67e5\u770b\u67e5\u8be2\u7684\u6267\u884c\u8ba1\u5212&#xff0c;\u5173\u6ce8 type \u5217\u3002\u82e5\u51fa\u73b0 ALL&#xff08;\u5168\u8868\u626b\u63cf&#xff09;&#xff0c;\u901a\u5e38\u610f\u5473\u7740\u67e5\u8be2\u6548\u7387\u4f4e\u4e0b&#xff0c;\u53ef\u80fd\u9700\u8981\u6dfb\u52a0\u5408\u9002\u7684\u7d22\u5f15\u3002\u4f8b\u5982&#xff0c;\u5bf9\u4e00\u4e2a\u5927\u8868\u8fdb\u884c\u65e0\u7d22\u5f15\u7684\u67e5\u8be2&#xff0c;\u5c31\u4f1a\u51fa\u73b0\u5168\u8868\u626b\u63cf\u3002<\/li>\n<li>\u68c0\u67e5\u7d22\u5f15\u4f7f\u7528&#xff1a;key \u5217\u663e\u793a\u5b9e\u9645\u4f7f\u7528\u7684\u7d22\u5f15&#xff0c;\u82e5\u4e3a NULL&#xff0c;\u8bf4\u660e\u672a\u4f7f\u7528\u7d22\u5f15\u3002\u540c\u65f6&#xff0c;\u5206\u6790 possible_keys \u5217&#xff0c;\u82e5\u6709\u53ef\u7528\u7d22\u5f15\u4f46\u672a\u88ab\u4f7f\u7528&#xff0c;\u53ef\u80fd\u662f\u7d22\u5f15\u9009\u62e9\u6027\u4e0d\u9ad8\u6216\u67e5\u8be2\u4f18\u5316\u5668\u9009\u62e9\u6709\u8bef\u3002<\/li>\n<li>\u5173\u6ce8\u626b\u63cf\u884c\u6570&#xff1a;rows \u5217\u8868\u793a MySQL \u4f30\u8ba1\u8981\u626b\u63cf\u7684\u884c\u6570&#xff0c;\u884c\u6570\u8fc7\u591a\u4f1a\u5f71\u54cd\u67e5\u8be2\u6027\u80fd\u3002\u82e5\u53d1\u73b0\u626b\u63cf\u884c\u6570\u8fdc\u8d85\u9884\u671f&#xff0c;\u9700\u4f18\u5316\u67e5\u8be2\u6761\u4ef6\u6216\u6dfb\u52a0\u7d22\u5f15\u3002<\/li>\n<\/ul>\n<h2>\u4ece\u7cfb\u7edf\u8d44\u6e90\u4f7f\u7528\u60c5\u51b5\u786e\u5b9a\u74f6\u9888<\/h2>\n<h3>CPU \u4f7f\u7528\u7387<\/h3>\n<ul>\n<li>\u9ad8 CPU \u4f7f\u7528\u7387&#xff1a;\u4f7f\u7528\u7cfb\u7edf\u76d1\u63a7\u5de5\u5177&#xff08;\u5982 top\u3001htop&#xff09;\u67e5\u770b CPU \u4f7f\u7528\u7387\u3002\u82e5 CPU \u957f\u671f\u5904\u4e8e\u9ad8\u8d1f\u8f7d\u72b6\u6001&#xff0c;\u53ef\u80fd\u662f\u67e5\u8be2\u590d\u6742\u5ea6\u9ad8\u3001\u5168\u8868\u626b\u63cf\u9891\u7e41\u6216\u670d\u52a1\u5668\u914d\u7f6e\u4e0d\u8db3\u3002\u4f8b\u5982&#xff0c;\u5927\u91cf\u590d\u6742\u7684\u805a\u5408\u67e5\u8be2\u4f1a\u4f7f CPU \u8d1f\u62c5\u52a0\u91cd\u3002<\/li>\n<li>CPU \u7b49\u5f85\u65f6\u95f4&#xff1a;\u5173\u6ce8 CPU \u7684\u7b49\u5f85\u65f6\u95f4&#xff0c;\u82e5\u7b49\u5f85\u65f6\u95f4\u8fc7\u957f&#xff0c;\u53ef\u80fd\u662f I\/O \u64cd\u4f5c\u9891\u7e41\u5bfc\u81f4 CPU \u7b49\u5f85\u6570\u636e&#xff0c;\u9700\u8981\u8fdb\u4e00\u6b65\u5206\u6790\u78c1\u76d8 I\/O \u60c5\u51b5\u3002<\/li>\n<\/ul>\n<h3>\u5185\u5b58\u4f7f\u7528\u60c5\u51b5<\/h3>\n<ul>\n<li>\u5185\u5b58\u4e0d\u8db3&#xff1a;\u901a\u8fc7 free\u3001vmstat \u7b49\u5de5\u5177\u67e5\u770b\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\u3002\u82e5\u5185\u5b58\u4e0d\u8db3&#xff0c;\u4f1a\u5bfc\u81f4\u9891\u7e41\u7684\u78c1\u76d8\u4ea4\u6362&#xff0c;\u4e25\u91cd\u5f71\u54cd\u6027\u80fd\u3002\u6bd4\u5982&#xff0c;innodb_buffer_pool_size \u914d\u7f6e\u8fc7\u5c0f&#xff0c;\u65e0\u6cd5\u7f13\u5b58\u8db3\u591f\u7684\u6570\u636e\u548c\u7d22\u5f15&#xff0c;\u4f1a\u589e\u52a0\u78c1\u76d8 I\/O\u3002<\/li>\n<li>\u5185\u5b58\u6cc4\u6f0f&#xff1a;\u89c2\u5bdf\u5185\u5b58\u4f7f\u7528\u662f\u5426\u6301\u7eed\u589e\u957f&#xff0c;\u82e5\u5b58\u5728\u5185\u5b58\u6cc4\u6f0f&#xff0c;\u4f1a\u9010\u6e10\u8017\u5c3d\u7cfb\u7edf\u8d44\u6e90\u3002\u53ef\u80fd\u662f\u67d0\u4e9b\u67e5\u8be2\u6216\u5e94\u7528\u7a0b\u5e8f\u5b58\u5728\u5185\u5b58\u7ba1\u7406\u95ee\u9898\u3002<\/li>\n<\/ul>\n<h3>\u78c1\u76d8 I\/O \u6027\u80fd<\/h3>\n<ul>\n<li>\u9ad8 I\/O \u8d1f\u8f7d&#xff1a;\u4f7f\u7528 iostat\u3001iotop \u7b49\u5de5\u5177\u67e5\u770b\u78c1\u76d8 I\/O \u8bfb\u5199\u60c5\u51b5\u3002\u82e5\u78c1\u76d8 I\/O \u8d1f\u8f7d\u8fc7\u9ad8&#xff0c;\u53ef\u80fd\u662f\u6570\u636e\u5e93\u9891\u7e41\u8bfb\u5199\u78c1\u76d8&#xff0c;\u5982\u5168\u8868\u626b\u63cf\u3001\u5927\u91cf\u6570\u636e\u63d2\u5165\u7b49\u64cd\u4f5c\u3002<\/li>\n<li>\u78c1\u76d8\u8bfb\u5199\u901f\u5ea6&#xff1a;\u68c0\u67e5\u78c1\u76d8\u7684\u8bfb\u5199\u901f\u5ea6&#xff0c;\u82e5\u901f\u5ea6\u8fc7\u6162&#xff0c;\u53ef\u80fd\u662f\u78c1\u76d8\u786c\u4ef6\u8001\u5316\u6216\u6027\u80fd\u4e0d\u8db3\u3002\u53ef\u4ee5\u8003\u8651\u66f4\u6362\u4e3a SSD \u786c\u76d8\u6765\u63d0\u9ad8 I\/O \u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2>\u4ece\u6570\u636e\u5e93\u5185\u90e8\u72b6\u6001\u786e\u5b9a\u74f6\u9888<\/h2>\n<h3>\u9501\u7b49\u5f85\u60c5\u51b5<\/h3>\n<ul>\n<li>\u67e5\u770b\u9501\u7b49\u5f85\u65f6\u95f4&#xff1a;\u901a\u8fc7 MySQL \u6027\u80fd\u6a21\u5f0f\u6216\u67e5\u8be2\u5206\u6790\u5668\u67e5\u770b\u9501\u7b49\u5f85\u76f8\u5173\u4fe1\u606f&#xff0c;\u5982 lock \u7b49\u5f85\u65f6\u95f4\u3002\u82e5\u9501\u7b49\u5f85\u65f6\u95f4\u8fc7\u957f&#xff0c;\u8bf4\u660e\u5b58\u5728\u5e76\u53d1\u64cd\u4f5c\u65f6\u7684\u9501\u51b2\u7a81\u95ee\u9898&#xff0c;\u5bfc\u81f4\u67e5\u8be2\u88ab\u963b\u585e\u3002<\/li>\n<li>\u5206\u6790\u9501\u7c7b\u578b\u548c\u8303\u56f4&#xff1a;\u786e\u5b9a\u662f\u884c\u9501\u3001\u8868\u9501\u8fd8\u662f\u95f4\u9699\u9501\u7b49&#xff0c;\u4ee5\u53ca\u9501\u7684\u8303\u56f4\u3002\u4f8b\u5982&#xff0c;\u4e0d\u5408\u7406\u7684\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\u6216\u957f\u4e8b\u52a1\u53ef\u80fd\u5bfc\u81f4\u9501\u6301\u6709\u65f6\u95f4\u8fc7\u957f&#xff0c;\u5f71\u54cd\u5e76\u53d1\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h3>\u7f13\u51b2\u6c60\u547d\u4e2d\u7387<\/h3>\n<ul>\n<li>\u8ba1\u7b97\u7f13\u51b2\u6c60\u547d\u4e2d\u7387&#xff1a;\u901a\u8fc7 SHOW GLOBAL STATUS LIKE \u2018Innodb_buffer_pool_read_requests\u2019; \u548c SHOW GLOBAL STATUS LIKE \u2018Innodb_buffer_pool_reads\u2019; 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