{"id":61650,"date":"2026-01-18T09:49:49","date_gmt":"2026-01-18T01:49:49","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/61650.html"},"modified":"2026-01-18T09:49:49","modified_gmt":"2026-01-18T01:49:49","slug":"%e7%ba%bf%e4%b8%8a%e6%9c%8d%e5%8a%a1%e5%99%a8cpu%e6%9a%b4%e6%b6%a8%e6%8e%92%e6%9f%a5%e6%8c%87%e5%8d%97%ef%bc%9a%e4%bb%8e%e7%b3%bb%e7%bb%9f%e5%88%b0mysql%e5%b1%82","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/61650.html","title":{"rendered":"\u7ebf\u4e0a\u670d\u52a1\u5668CPU\u66b4\u6da8\u6392\u67e5\u6307\u5357\uff1a\u4ece\u7cfb\u7edf\u5230MySQL\u5c42"},"content":{"rendered":"<p>\u5728\u65e5\u5e38\u8fd0\u7ef4\u6216\u5f00\u53d1\u5de5\u4f5c\u4e2d&#xff0c;\u7ebf\u4e0a\u670d\u52a1\u5668\u7a81\u7136\u51fa\u73b0CPU\u9ad8\u8d1f\u8f7d\u66b4\u6da8\u662f\u9ad8\u9891\u7a81\u53d1\u95ee\u9898\u3002\u82e5\u4e0d\u80fd\u5feb\u901f\u5b9a\u4f4d\u6839\u6e90&#xff0c;\u53ef\u80fd\u5bfc\u81f4\u670d\u52a1\u54cd\u5e94\u7f13\u6162\u3001\u751a\u81f3\u96c6\u7fa4\u5b95\u673a\u3002\u672c\u6587\u5c06\u4ece\u7cfb\u7edf\u5c42\u9762\u548cMySQL\u5e94\u7528\u5c42\u9762\u62c6\u89e3\u6392\u67e5\u6d41\u7a0b&#xff0c;\u5e76\u68b3\u7406\u5e38\u89c1\u8bf1\u56e0&#xff0c;\u5e2e\u4f60\u9ad8\u6548\u89e3\u51b3CPU\u66b4\u6da8\u95ee\u9898\u3002<\/p>\n<h3>1. \u7cfb\u7edf\u5c42\u9762\u6392\u67e5&#xff1a;\u5148\u5b9a\u4f4d\u786c\u4ef6\u4e0e\u7cfb\u7edf\u8fdb\u7a0b<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260118014944-696c3c38cce42.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u5f53\u6536\u5230CPU\u9ad8\u8d1f\u8f7d\u544a\u8b66\u65f6&#xff0c;\u7b2c\u4e00\u6b65\u9700\u5148\u4ece\u64cd\u4f5c\u7cfb\u7edf\u5c42\u6392\u67e5&#xff0c;\u6392\u9664\u786c\u4ef6\u8d44\u6e90\u74f6\u9888\u6216\u5f02\u5e38\u8fdb\u7a0b\u5360\u7528\u7684\u95ee\u9898\u3002\u6838\u5fc3\u901a\u8fc73\u7c7b\u547d\u4ee4\u5b9a\u4f4d\u5173\u952e\u4fe1\u606f&#xff0c;\u64cd\u4f5c\u6b65\u9aa4\u5982\u4e0b&#xff1a;<\/p>\n<li>\n<p>\u67e5\u770b\u9ad8CPU\u5360\u7528\u8fdb\u7a0b<br \/>\n\u6267\u884ctop\u547d\u4ee4&#xff0c;\u5b9e\u65f6\u67e5\u770b\u7cfb\u7edf\u8fdb\u7a0b\u7684CPU\u4f7f\u7528\u7387\u3001\u5185\u5b58\u5360\u7528\u7b49\u6570\u636e\u3002\u901a\u8fc7\u6392\u5e8f&#xff08;\u6309P\u952e\u6309CPU\u4f7f\u7528\u7387\u964d\u5e8f&#xff09;&#xff0c;\u53ef\u5feb\u901f\u5b9a\u4f4d\u662f\u5426\u6709\u5355\u4e2a\u6216\u591a\u4e2a\u8fdb\u7a0b&#xff08;\u5982\u5f02\u5e38\u811a\u672c\u3001\u8d44\u6e90\u6cc4\u6f0f\u7684\u670d\u52a1&#xff09;\u5360\u7528\u8fc7\u9ad8CPU\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260118014945-696c3c3992973.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<\/li>\n<li>\n<p>\u68c0\u67e5\u5185\u5b58\u4f7f\u7528\u60c5\u51b5<br \/>\n\u5185\u5b58\u4e0d\u8db3\u53ef\u80fd\u5bfc\u81f4\u7cfb\u7edf\u9891\u7e41Swap&#xff0c;\u95f4\u63a5\u5f15\u53d1CPU\u8d1f\u8f7d\u5347\u9ad8\u3002\u901a\u8fc7\u4ee5\u4e0b\u4e24\u4e2a\u547d\u4ee4\u67e5\u770b\u5185\u5b58\u72b6\u6001&#xff1a;<\/p>\n<ul>\n<li>free -g&#xff1a;\u4ee5GB\u4e3a\u5355\u4f4d\u663e\u793a\u5185\u5b58\u603b\u5bb9\u91cf\u3001\u5df2\u7528\u3001\u7a7a\u95f2\u53caSwap\u5206\u533a\u60c5\u51b5&#xff0c;\u9002\u5408\u5feb\u901f\u6982\u89c8\u3002<\/li>\n<li>free -m&#xff1a;\u4ee5MB\u4e3a\u5355\u4f4d\u663e\u793a&#xff0c;\u7cbe\u5ea6\u66f4\u9ad8&#xff0c;\u53ef\u7528\u4e8e\u5224\u65ad\u662f\u5426\u5b58\u5728\u5185\u5b58\u7d27\u5f20\u95ee\u9898\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260118014945-696c3c39df632.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u6392\u67e5\u78c1\u76d8IO\u662f\u5426\u5f02\u5e38<br \/>\n\u78c1\u76d8IO\u74f6\u9888&#xff08;\u5982\u8bfb\u5199\u901f\u5ea6\u6162\u3001IO\u7b49\u5f85\u9ad8&#xff09;\u4f1a\u5bfc\u81f4\u8fdb\u7a0b\u963b\u585e&#xff0c;\u8fdb\u800c\u4f7fCPU\u5904\u4e8e\u201c\u7b49\u5f85IO\u201d\u7684\u9ad8\u8d1f\u8f7d\u72b6\u6001\u3002\u9700\u5148\u5b89\u88c5\u7cfb\u7edf\u76d1\u63a7\u5de5\u5177&#xff0c;\u518d\u67e5\u770bIO\u60c5\u51b5&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u5b89\u88c5\u5de5\u5177&#xff1a;yum install -y sysstat&#xff08;\u9002\u7528\u4e8eCentOS\/RHEL\u7cfb\u7edf&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u67e5\u770bIO\u72b6\u6001&#xff1a;iostat&#xff0c;\u91cd\u70b9\u5173\u6ce8\u4ee5\u4e0b\u6838\u5fc3\u6307\u6807&#xff0c;\u7ed3\u5408\u6570\u503c\u5224\u65ad\u8bbe\u5907\u5065\u5eb7\u5ea6\u4e0e\u8d1f\u8f7d\u60c5\u51b5&#xff1a;<\/p>\n<ul>\n<li>%iowait&#xff1a;CPU \u7a7a\u95f2\u4e14\u7b49\u5f85 IO \u64cd\u4f5c\u5b8c\u6210\u7684\u65f6\u95f4\u767e\u5206\u6bd4&#xff0c;\u7406\u60f3\u503c\u22642%&#xff0c;\u53ef\u63a5\u53d7\u503c\u22645%&#xff0c;\u8d85\u51fa\u5219\u8bf4\u660e IO \u7b49\u5f85\u5bf9 CPU \u5f71\u54cd\u8f83\u5927\u3002<\/li>\n<li>tps&#xff1a;\u6bcf\u79d2 IO \u8bf7\u6c42\u6570&#xff08;\u542b\u8bfb\u3001\u5199\u3001\u5408\u5e76\u8bf7\u6c42&#xff09;&#xff0c;\u76f4\u63a5\u53cd\u6620\u8bbe\u5907 IO \u538b\u529b\u3002\u673a\u68b0\u786c\u76d8\u901a\u5e38\u2264100&#xff08;\u2265150 \u4e3a\u9ad8\u8d1f\u8f7d&#xff09;&#xff0c;SSD \u5219\u53ef\u8fbe\u5230\u6570\u5343\u3002<\/li>\n<li>kB_read\/s&#xff1a;\u6bcf\u79d2\u8bfb\u53d6\u6570\u636e\u91cf&#xff08;\u541e\u5410\u91cf&#xff09;&#xff0c;\u5355\u4f4d\u4e3a KB\u3002\u9700\u5bf9\u6bd4\u8bbe\u5907\u6807\u79f0\u5e26\u5bbd&#xff08;\u5982 SATA \u673a\u68b0\u76d8\u7ea6 100MB\/s&#xff0c;\u5373 102400KB\/s&#xff09;&#xff0c;\u5224\u65ad\u662f\u5426\u8fbe\u5230\u8bfb\u53d6\u6027\u80fd\u74f6\u9888\u3002<\/li>\n<li>kB_wrtn\/s&#xff1a;\u6bcf\u79d2\u5199\u5165\u6570\u636e\u91cf&#xff08;\u541e\u5410\u91cf&#xff09;&#xff0c;\u5355\u4f4d\u4e3a KB\u3002\u53c2\u8003\u6807\u51c6\u4e0e kB_read\/s \u4e00\u81f4&#xff0c;\u4e14\u9700\u6ce8\u610f\u5199\u5165\u901f\u5ea6\u901a\u5e38\u6162\u4e8e\u8bfb\u53d6\u901f\u5ea6&#xff0c;\u673a\u68b0\u76d8\u6b64\u5dee\u5f02\u66f4\u660e\u663e\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u82e5\u9700\u66f4\u8be6\u7ec6 IO \u5206\u6790&#xff08;\u5982\u5b9a\u4f4d\u6162 IO&#xff09;\u53ef\u6267\u884c iostat -x 1&#xff08;-x \u663e\u793a\u6269\u5c55\u6307\u6807&#xff0c;1 \u6bcf\u79d2\u5237\u65b0\u4e00\u6b21&#xff09;&#xff0c;\u91cd\u70b9\u5173\u6ce8\u989d\u5916\u6269\u5c55\u53c2\u6570&#xff1a;<\/p>\n<ul>\n<li>%util&#xff1a;\u8bbe\u5907\u5229\u7528\u7387&#xff08;\u6838\u5fc3&#xff01;\u226590% \u8bf4\u660e\u8bbe\u5907\u6ee1\u8d1f\u8377&#xff09;&#xff1b;<\/li>\n<li>avgqu-sz&#xff1a;\u5e73\u5747 IO \u961f\u5217\u957f\u5ea6&#xff08;\u7406\u60f3 \u22642&#xff0c;&gt;5 \u8bf4\u660e\u8bf7\u6c42\u5806\u79ef&#xff09;&#xff1b;<\/li>\n<li>await&#xff1a;\u5e73\u5747\u6bcf\u6b21 IO \u8bf7\u6c42\u7b49\u5f85\u65f6\u95f4&#xff08;\u542b\u961f\u5217\u7b49\u5f85&#043;\u8bbe\u5907\u5904\u7406&#xff0c;\u5355\u4f4d ms&#xff0c;\u673a\u68b0\u76d8\u901a\u5e38 \u226420ms&#xff0c;&gt;50ms \u53ef\u80fd\u6709\u95ee\u9898&#xff09;&#xff1b;<\/li>\n<li>svctm&#xff1a;\u8bbe\u5907\u5b9e\u9645\u5904\u7406\u6bcf\u6b21 IO \u7684\u65f6\u95f4&#xff08;\u5355\u4f4d ms&#xff0c;\u53cd\u6620\u8bbe\u5907\u672c\u8eab\u901f\u5ea6&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260118014946-696c3c3a02cbe.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u7cfb\u7edf\u5c42\u9762\u6392\u67e5\u540e&#xff0c;\u82e5\u672a\u53d1\u73b0\u5f02\u5e38\u8fdb\u7a0b\u6216\u786c\u4ef6\u74f6\u9888&#xff0c;\u9700\u8fdb\u4e00\u6b65\u6df1\u5165MySQL\u6570\u636e\u5e93\u5c42\u2014\u2014\u4f5c\u4e3a\u4e1a\u52a1\u6838\u5fc3\u7ec4\u4ef6&#xff0c;MySQL\u7684\u5f02\u5e38\u5f80\u5f80\u662fCPU\u66b4\u6da8\u7684\u201c\u9690\u5f62\u63a8\u624b\u201d\u3002<\/p>\n<h3>2. MySQL\u5c42\u9762\u6392\u67e5&#xff1a;\u805a\u7126SQL\u4e0e\u6570\u636e\u5e93\u72b6\u6001<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260118014946-696c3c3ad499d.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>MySQL\u4f5c\u4e3a\u5173\u7cfb\u578b\u6570\u636e\u5e93&#xff0c;\u5176SQL\u6267\u884c\u6548\u7387\u3001\u9501\u7b49\u5f85\u3001\u6d41\u91cf\u5cf0\u503c\u7b49\u95ee\u9898&#xff0c;\u662f\u5bfc\u81f4CPU\u9ad8\u8d1f\u8f7d\u7684\u6838\u5fc3\u8bf1\u56e0\u3002\u9700\u6309\u201c\u5b9e\u65f6\u8fdb\u7a0b\u2192\u6162\u67e5\u8be2\u2192\u9501\u72b6\u6001\u2192\u6d41\u91cf\u5cf0\u503c\u201d\u7684\u987a\u5e8f\u9010\u6b65\u6392\u67e5&#xff1a;<\/p>\n<h4>2.1 \u7b2c\u4e00\u6b65&#xff1a;\u67e5\u770bMySQL\u5b9e\u65f6\u6267\u884c\u8fdb\u7a0b<\/h4>\n<p>\u6267\u884cSQL\u547d\u4ee4 show processlist;&#xff0c;\u67e5\u770b\u5f53\u524dMySQL\u6b63\u5728\u8fd0\u884c\u7684\u6240\u6709\u8fde\u63a5\u8fdb\u7a0b\u3002\u91cd\u70b9\u5173\u6ce8\u4e24\u7c7b\u8fdb\u7a0b&#xff1a;<\/p>\n<ul>\n<li>\u72b6\u6001\u4e3a\u201cRunning\u201d\u4e14Time&#xff08;\u6267\u884c\u65f6\u95f4&#xff09;\u8fc7\u957f\u7684\u8fdb\u7a0b&#xff0c;\u5224\u65ad\u662f\u5426\u6709\u957f\u8017\u65f6SQL\u5360\u7528CPU\u3002<\/li>\n<li>\u72b6\u6001\u4e3a\u201cLocked\u201d\u201cWaiting for table metadata lock\u201d\u7b49\u963b\u585e\u72b6\u6001\u7684\u8fdb\u7a0b&#xff0c;\u6392\u67e5\u662f\u5426\u5b58\u5728\u9501\u7b49\u5f85\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260118014947-696c3c3bb7ad0.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/li>\n<\/ul>\n<h4>2.2 \u7b2c\u4e8c\u6b65&#xff1a;\u5206\u6790\u6162\u67e5\u8be2\u65e5\u5fd7<\/h4>\n<p>\u6162\u67e5\u8be2&#xff08;\u901a\u5e38\u6307\u6267\u884c\u65f6\u95f4\u8d85\u8fc7long_query_time\u9608\u503c\u7684SQL&#xff09;\u662f\u5bfc\u81f4MySQL CPU\u66b4\u6da8\u7684\u6700\u9ad8\u9891\u539f\u56e0&#xff0c;\u9700\u901a\u8fc7\u6162\u67e5\u8be2\u65e5\u5fd7\u5b9a\u4f4d\u95ee\u9898SQL&#xff1a;<\/p>\n<li>\n<p>\u5148\u786e\u8ba4\u6162\u67e5\u8be2\u65e5\u5fd7\u5df2\u5f00\u542f&#xff08;\u53ef\u901a\u8fc7show variables like &#039;slow_query_log&#039;;\u67e5\u770b&#xff09;&#xff0c;\u82e5\u672a\u5f00\u542f\u9700\u4e34\u65f6\u6216\u6c38\u4e45\u5f00\u542f&#xff08;\u4fee\u6539my.cnf\u914d\u7f6e&#xff09;\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260118014947-696c3c3bd9ebf.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<\/li>\n<li>\n<p>\u67e5\u770b\u6162\u67e5\u8be2\u65e5\u5fd7\u5185\u5bb9&#xff0c;\u7b5b\u9009\u201cCPU\u9ad8\u8d1f\u8f7d\u65f6\u6bb5\u201d\u5185\u7684\u6240\u6709\u6162\u67e5\u8be2&#xff0c;\u91cd\u70b9\u5173\u6ce8&#xff1a;<\/p>\n<ul>\n<li>\u662f\u5426\u5b58\u5728\u201c\u5168\u8868\u626b\u63cf\u201dSQL&#xff08;\u5982\u672a\u52a0\u7d22\u5f15\u3001\u7d22\u5f15\u5931\u6548\u7684SELECT *\u67e5\u8be2&#xff09;\u3002<\/li>\n<li>\u662f\u5426\u5b58\u5728\u590d\u6742\u5173\u8054\u67e5\u8be2&#xff08;\u5982\u591a\u8868JOIN\u672a\u4f18\u5316\u3001\u5b50\u67e5\u8be2\u5d4c\u5957\u8fc7\u6df1&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u5bf9\u53ef\u7591\u6162\u67e5\u8be2\u6267\u884cexplain\u547d\u4ee4&#xff0c;\u5206\u6790SQL\u6267\u884c\u8ba1\u5212&#xff1a;\u67e5\u770b\u662f\u5426\u4f7f\u7528\u7d22\u5f15&#xff08;key\u5217\u975eNULL&#xff09;\u3001rows&#xff08;\u9884\u4f30\u626b\u63cf\u884c\u6570&#xff09;\u662f\u5426\u8fc7\u5927&#xff0c;\u8fdb\u800c\u5224\u65ad\u662f\u5426\u9700\u8981\u6dfb\u52a0\u7d22\u5f15\u6216\u91cd\u6784SQL\u3002<\/p>\n<\/li>\n<h4>2.3 \u7b2c\u4e09\u6b65&#xff1a;\u68c0\u67e5\u9501\u7b49\u5f85\u4e0e\u6d41\u91cf\u5cf0\u503c<\/h4>\n<ul>\n<li>\u9501\u7b49\u5f85\u6392\u67e5&#xff1a;\u82e5show processlist;\u4e2d\u5b58\u5728\u5927\u91cf\u9501\u7b49\u5f85\u8fdb\u7a0b&#xff0c;\u9700\u8fdb\u4e00\u6b65\u901a\u8fc7show engine innodb 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