{"id":5346,"date":"2020-07-29T21:16:20","date_gmt":"2020-07-29T13:16:20","guid":{"rendered":"http:\/\/39.97.231.10\/?p=5346"},"modified":"2020-07-29T21:16:20","modified_gmt":"2020-07-29T13:16:20","slug":"mysql-linux-%e5%86%85%e6%a0%b8%e5%8f%82%e6%95%b0%e8%b0%83%e4%bc%98","status":"publish","type":"post","link":"http:\/\/www.weijing.co\/?p=5346","title":{"rendered":"MySQL Linux \u5185\u6838\u53c2\u6570\u8c03\u4f18"},"content":{"rendered":"<div class=\\\"blog_content\\\">\n<div class=\\\"blog_detail\\\">\n<div>\n\u5927\u591a\u6570MySQL\u8fd0\u884c\u5728Linux\u64cd\u4f5c\u7cfb\u7edf\u4e4b\u4e0a\uff0cLinux\u5185\u6838\u53c2\u6570\u5bf9\u4e8eMySQL\u7684\u6027\u80fd\u6709\u91cd\u8981\u7684\u5f71\u54cd\uff0c\u4e0b\u9762\u5c06\u4ecb\u7ecd\u4e00\u4e9b\u6700\u91cd\u8981\u7684Linux\u5185\u6838\u53c2\u6570\u8c03\u4f18\uff0c\u4ee5\u4fbf\u8ba9Linux\u4e0a\u8fd0\u884c\u7684MySQL\u6574\u4f53\u6027\u80fd\u66f4\u9ad8\u3002<\/p>\n<h4>1. Swappiness<\/h4>\n<p>swappiness\u5185\u6838\u53c2\u6570\u5c06\u5728\u5185\u5b58\u4e0d\u591f\u7528\u7684\u6761\u4ef6\u4e0b\uff0c\u51b3\u5b9a\u5185\u5b58\u6362\u9875\u7684\u7b56\u7565\u3002\u8be5\u53c2\u6570\u53d6\u503c\u8303\u56f40~100\uff0c\u53d6\u503c\u8d8a\u5927\uff0c\u5185\u6838\u4f1a\u8d8a\u79ef\u6781\u5730\u4f7f\u7528swap\u5206\u533a\uff0c\u8bbe\u7f6e\u4e3a0\u8868\u793a\u6700\u5927\u9650\u5ea6\u4f7f\u7528\u7269\u7406\u5185\u5b58\uff0c\u5bf9\u4e8e\u6570\u636e\u5e93\u5e94\u7528\uff0c\u5efa\u8bae\u8be5\u53c2\u6570\u8bbe\u7f6e\u4e3a0\u3002<br \/>\n\u67e5\u770b\u5f53\u524d\u7684swappiness\u503c\uff1a<br \/>\ncat \/proc\/sys\/vm\/swappiness<br \/>\n\u8bbe\u7f6eswappiness\u503c\uff1a<br \/>\necho 0 &gt; \/proc\/sys\/vm\/swappiness<br \/>\n\u6301\u4e45\u5316\u5230\u914d\u7f6e\u6587\u4ef6\uff1a<br \/>\n\/etc\/sysctl.conf<br \/>\nvm.swappiness=0<\/p>\n<h4>2. I\/O Scheduler<\/h4>\n<p>\u6570\u636e\u5e93\u5bf9I\/O\u6027\u80fd\u8981\u6c42\u9ad8\uff0c\u5b58\u50a8\u6570\u636e\u3001\u8bfb\u53d6\u6570\u636e\u90fd\u9700\u8981\u5927\u91cf\u6d88\u8017I\/O\uff0c\u56e0\u6b64\u78c1\u76d8I\/O\u8c03\u5ea6\u7b56\u7565\u662f\u6570\u636e\u5e93\u9700\u8981\u5173\u6ce8\u7684\u91cd\u70b9\u5185\u6838\u53c2\u6570\u3002<br \/>\n\u76ee\u524d Linux \u4e0a\u6709\u5982\u4e0b\u51e0\u79cd I\/O \u8c03\u5ea6\u7b97\u6cd5\uff1a<\/p>\n<ul>\n<li>noop(No Operation)\uff0cnoop\u8c03\u5ea6\u7b97\u6cd5\u662f\u5185\u6838\u4e2d\u6700\u7b80\u5355\u7684IO\u8c03\u5ea6\u7b97\u6cd5\u3002noop\u8c03\u5ea6\u7b97\u6cd5\u4e5f\u53eb\u4f5c\u7535\u68af\u8c03\u5ea6\u7b97\u6cd5\uff0c\u5b83\u5c06IO\u8bf7\u6c42\u653e\u5165\u5230\u4e00\u4e2aFIFO\u961f\u5217\u4e2d\uff0c\u7136\u540e\u9010\u4e2a\u6267\u884c\u8fd9\u4e9bIO\u8bf7\u6c42\uff0c\u5f53\u7136\u5bf9\u4e8e\u4e00\u4e9b\u5728\u78c1\u76d8\u4e0a\u8fde\u7eed\u7684IO\u8bf7\u6c42\uff0cnoop\u7b97\u6cd5\u4f1a\u9002\u5f53\u505a\u4e00\u4e9b\u5408\u5e76\u3002\u8fd9\u4e2a\u8c03\u5ea6\u7b97\u6cd5\u7279\u522b\u9002\u5408\u90a3\u4e9b\u4e0d\u5e0c\u671b\u8c03\u5ea6\u5668\u91cd\u65b0\u7ec4\u7ec7IO\u8bf7\u6c42\u987a\u5e8f\u7684\u5e94\u7528\u3002<\/li>\n<li>cfq(Completely Fair Scheduler )\uff0c\u5b8c\u5168\u516c\u5e73\u8c03\u5ea6\u5668\uff0c\u5b83\u8bd5\u56fe\u4e3a\u7ade\u4e89\u5757\u8bbe\u5907\u4f7f\u7528\u6743\u7684\u6240\u6709\u8fdb\u7a0b\u5206\u914d\u4e00\u4e2a\u8bf7\u6c42\u961f\u5217\u548c\u4e00\u4e2a\u65f6\u95f4\u7247\uff0c\u5728\u8c03\u5ea6\u5668\u5206\u914d\u7ed9\u8fdb\u7a0b\u7684\u65f6\u95f4\u7247\u5185\uff0c\u8fdb\u7a0b\u53ef\u4ee5\u5c06\u5176\u8bfb\u5199\u8bf7\u6c42\u53d1\u9001\u7ed9\u5e95\u5c42\u5757\u8bbe\u5907\uff0c\u5f53\u8fdb\u7a0b\u7684\u65f6\u95f4\u7247\u6d88\u8017\u5b8c\uff0c\u8fdb\u7a0b\u7684\u8bf7\u6c42\u961f\u5217\u5c06\u88ab\u6302\u8d77\uff0c\u7b49\u5f85\u8c03\u5ea6\uff0c\u8fdb\u7a0b\u5e73\u5747\u4f7f\u7528IO\u5e26\u5bbd\u3002<\/li>\n<li>deadline\uff0cdeadline\u7b97\u6cd5\u7684\u6838\u5fc3\u5728\u4e8e\u4fdd\u8bc1\u6bcf\u4e2aIO\u8bf7\u6c42\u5728\u4e00\u5b9a\u7684\u65f6\u95f4\u5185\u4e00\u5b9a\u8981\u88ab\u670d\u52a1\u5230\uff0c\u4ee5\u6b64\u6765\u907f\u514d\u67d0\u4e2a\u8bf7\u6c42\u9965\u997f\u3002<\/li>\n<li>anticipatory\uff0c\u542f\u53d1\u5f0f\u8c03\u5ea6\uff0c\u7c7b\u4f3c deadline \u7b97\u6cd5\uff0c\u4f46\u662f\u5f15\u5165\u9884\u6d4b\u673a\u5236\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ul>\n<p>CentOS 7.x \u9ed8\u8ba4\u652f\u6301\u7684\u662fdeadline\u7b97\u6cd5\uff0cCentOS 6.x \u4e0b\u9ed8\u8ba4\u652f\u6301\u7684cfq\u7b97\u6cd5\uff0c\u800c\u4e00\u822c\u6211\u4eec\u4f1a\u5728SSD\u56fa\u6001\u76d8\u786c\u76d8\u73af\u5883\u4e2d\u4f7f\u7528noop\u7b97\u6cd5\u3002<br \/>\n\u67e5\u770bI\/O Scheduler\u503c\uff1a<br \/>\ncat \/sys\/block\/sdb\/queue\/scheduler<br \/>\n\u8bbe\u7f6eI\/O Scheduler\u503c\uff1a<br \/>\nsudo echo noop &gt; \/sys\/block\/sdb\/queue\/scheduler<\/p>\n<h4>3. TCP<\/h4>\n<h5>3.1 tcp\u63a5\u53d7\u8fde\u63a5\u8bbe\u7f6e<\/h5>\n<ul>\n<li>net.core.netdev_max_backlog = 65535\uff0c\u5f53\u7f51\u7edc\u63a5\u6536\u901f\u7387\u5927\u4e8e\u5185\u6838\u5904\u7406\u901f\u7387\u65f6\uff0c\u5141\u8bb8\u53d1\u9001\u5230\u961f\u5217\u4e2d\u7684\u5305\u6570\u76ee\u3002<\/li>\n<li>net.ipv4.tcp_max_syn_backlog = 65535\uff0c\u8868\u793aSYN\u961f\u5217\u957f\u5ea6\uff0c\u9ed8\u8ba41024\uff0c\u6539\u621065535\uff0c\u53ef\u4ee5\u5bb9\u7eb3\u66f4\u591a\u7b49\u5f85\u8fde\u63a5\u7684\u7f51\u7edc\u8fde\u63a5\u6570\u3002<\/li>\n<li>net.core.somaxconn = 65535\uff0c\u6bcf\u4e2a\u7aef\u53e3\u76d1\u542c\u961f\u5217\u7684\u6700\u5927\u957f\u5ea6\u3002<\/li>\n<\/ul>\n<h5>3.2 tcp\u5931\u6548\u8fde\u63a5\u8d44\u6e90\u56de\u6536<\/h5>\n<p>\u5bf9\u4e8etcp\u5931\u6548\u8fde\u63a5\u5360\u7528\u7cfb\u7edf\u8d44\u6e90\u7684\u4f18\u5316\uff0c\u52a0\u5feb\u8d44\u6e90\u56de\u6536\u6548\u7387\uff1a<\/p>\n<ul>\n<li>net.ipv4.tcp_keepalive_time = 30\uff0c\u8868\u793a\u5f53keepalive\u542f\u7528\u7684\u65f6\u5019\uff0cTCP\u53d1\u9001keepalive\u6d88\u606f\u7684\u9891\u5ea6\uff0c\u9ed8\u8ba4\u4e3a2\u5c0f\u65f6\uff0c\u6539\u4e3a30\u79d2\u3002<\/li>\n<li>net.ipv4.tcp_keepalive_intvl = 3\uff0ctcp\u672a\u83b7\u5f97\u54cd\u5e94\u65f6\u91cd\u53d1\u95f4\u9694\u3002<\/li>\n<li>net.ipv4.tcp_keepalive_probes = 3\uff0ctcp\u672a\u83b7\u5f97\u54cd\u5e94\u65f6\u91cd\u53d1\u6570\u91cf\u3002<\/li>\n<\/ul>\n<p>\u63a7\u5236tcp\u8fde\u63a5\u7b49\u5f85\u65f6\u95f4\uff0c\u52a0\u5febtcp\u94fe\u63a5\u56de\u6536\uff1a<\/p>\n<ul>\n<li>net.ipv4.tcp_fin_timeout = 10\uff0c\u5982\u679c\u5957\u63a5\u5b57\u7531\u672c\u7aef\u8981\u6c42\u5173\u95ed\uff0c\u8fd9\u4e2a\u53c2\u6570\u51b3\u5b9a\u4e86\u5b83\u4fdd\u6301\u5728FIN-WAIT-2\u72b6\u6001\u7684\u65f6\u95f4\u3002<\/li>\n<li>net.ipv4.tcp_tw_reuse = 1\uff0c\u5f00\u542fsocket\u91cd\u7528,\u5141\u8bb8\u5c06TIME-WAIT socket\u91cd\u65b0\u7528\u4e8e\u65b0\u7684TCP\u8fde\u63a5\uff0c\u9ed8\u8ba4\u4e3a0\uff0c\u8868\u793a\u5173\u95ed\u3002<\/li>\n<li>net.ipv4.tcp_tw_recycle = 1\uff0c\u5f00\u542fTCP\u8fde\u63a5\u4e2dTIME-WAIT socket\u7684\u5feb\u901f\u56de\u6536\uff0c\u9ed8\u8ba4\u4e3a0\uff0c\u8868\u793a\u5173\u95ed\u3002<\/li>\n<\/ul>\n<h5>3.3 tcp\u63a5\u53d7\u8fde\u63a5\u7f13\u51b2\u533a\u5927\u5c0f<\/h5>\n<p>\u63a7\u5236tcp\u63a5\u53d7\u7f13\u51b2\u533a\u7684\u5927\u5c0f\uff0c\u8bbe\u7f6e\u5927\u4e00\u4e9b\u6bd4\u8f83\u597d\uff1a<\/p>\n<ul>\n<li>net.core.wmem_default = 8388608<\/li>\n<li>net.core.wmem_max = 16777216<\/li>\n<li>net.core.rmem_default = 8388608<\/li>\n<li>net.core.rmem_max = 16777216<\/li>\n<\/ul>\n<h4>4. \u6700\u5927\u6587\u4ef6\u53e5\u67c4<\/h4>\n<p>\u64cd\u4f5c\u7cfb\u7edf\u6700\u5927\u6587\u4ef6\u53e5\u67c4\u6570\u9650\u5236\uff1a<br \/>\nvim \/etc\/security\/limits.conf<\/p>\n<ul>\n<li>soft nofile 65535<\/li>\n<li>hard nofile 65535<\/li>\n<\/ul>\n<h4>5. CPU Governor<\/h4>\n<p>\u5927\u591a\u6570\u73b0\u4ee3\u5904\u7406\u5668\u90fd\u80fd\u5728\u8bb8\u591a\u4e0d\u540c\u7684\u65f6\u949f\u9891\u7387\u548c\u7535\u538b\u914d\u7f6e\u4e0b\u5de5\u4f5c\u3002\u4e00\u822c\u6765\u8bf4\uff0c\u65f6\u949f\u9891\u7387\u8d8a\u9ad8\uff0c\u7535\u538b\u8d8a\u9ad8\uff0cCPU\u53ef\u4ee5\u6267\u884c\u7684\u6307\u4ee4\u5c31\u8d8a\u591a\u3002\u540c\u6837\uff0c\u65f6\u949f\u9891\u7387\u548c\u7535\u538b\u8d8a\u9ad8\uff0c\u6d88\u8017\u7684\u80fd\u91cf\u8d8a\u591a\u3002\u56e0\u6b64\uff0c\u5728CPU\u5bb9\u91cf\u548c\u5904\u7406\u5668\u6d88\u8017\u7684\u529f\u7387\u4e4b\u95f4\u6709\u4e00\u4e2a\u6743\u8861\u3002<br \/>\n\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u68c0\u67e5\u6b63\u5728\u4f7f\u7528\u7684\u9a71\u52a8\u7a0b\u5e8f\u548c\u8c03\u63a7\u5668\uff1a<\/p>\n<pre><code>analyzing CPU 0:\n  driver: intel_pstate\n  CPUs which run at the same hardware frequency: 0\n  CPUs which need to have their frequency coordinated by software: 0\n  maximum transition latency:  Cannot determine or is not supported.\n  hardware limits: 1.20 GHz - 3.20 GHz\n  available cpufreq governors: performance powersave\n  current policy: frequency should be within 1.20 GHz and 3.20 GHz.\n                  The governor \\\"powersave\\\" may decide which speed to use\n                  within this range.\n  current CPU frequency: 2.40 GHz (asserted by call to hardware)\n  boost state support:\n    Supported: no\n    Active: no\n<\/code><\/pre>\n<p>\u67e5\u770bCPU\u52a0\u901f\u8bbe\u7f6e\uff1a<br \/>\ncat \/sys\/devices\/system\/cpu\/cpu*\/cpufreq\/scaling_governor<br \/>\n\u8bbe\u7f6eCPU\u52a0\u901f\u7b56\u7565\uff1a<br \/>\necho \\&#8221;performance\\&#8221; | sudo tee \/sys\/devices\/system\/cpu\/cpu*\/cpufreq\/scaling_governor<\/p>\n<h4>6. NUMA<\/h4>\n<p>NUMA\u8868\u793aNon-uniform memory access\uff0c\u5e26\u6709NUMA\u529f\u80fd\uff0cSMP\u7cfb\u7edf\u7684\u5904\u7406\u5668\u8bbf\u95ee\u5b83\u81ea\u5df1\u7684\u672c\u5730\u5185\u5b58\u6bd4\u975e\u672c\u5730\u5185\u5b58\u66f4\u5feb\u3002\u8fd9\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5185\u5b58\u6362\u51fa(swap)\uff0c\u4ece\u800c\u5bf9\u6570\u636e\u5e93\u6027\u80fd\u4ea7\u751f\u8d1f\u9762\u5f71\u54cd\u3002\u5f53\u5206\u914d\u7ed9InnoDB\u7f13\u51b2\u6c60\u7684\u5185\u5b58\u5927\u4e8e\u53ef\u7528\u5185\u5b58\u7684\u6570\u91cf\uff0c\u5e76\u4e14\u9009\u62e9\u4e86\u9ed8\u8ba4\u5185\u5b58\u5206\u914d\u7b56\u7565\u65f6\uff0c\u53ef\u80fd\u4f1a\u53d1\u751f\u5185\u5b58\u4ea4\u6362(swap)\u3002\u542f\u7528NUMA\u7684\u670d\u52a1\u5668\u5c06\u62a5\u544aCPU\u8282\u70b9\u4e4b\u95f4\u7684\u4e0d\u540c\u8282\u70b9\u8ddd\u79bb(distances)\u3002<br \/>\n\u901a\u8fc7\u5982\u4e0b\u547d\u4ee4\u67e5\u770b\uff1a<br \/>\nnumactl &#8211;hardware<br \/>\n\u4e0d\u7ba1numactl\u663e\u793a\u7684\u8de8\u8282\u70b9\u95f4\u7684\u8ddd\u79bb\u662f\u591a\u5c11\uff0c\u5e94\u5f53\u5f00\u542fMySQL\u53c2\u6570innodb_numa_interleave\uff0c\u6765\u786e\u4fdd\u5185\u5b58\u53ef\u4ee5\u4ea4\u9519\u4f7f\u7528\u3002\n<\/p><\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u5927\u591a\u6570MySQL\u8fd0\u884c\u5728Linux\u64cd\u4f5c\u7cfb\u7edf\u4e4b\u4e0a\uff0cLinux\u5185\u6838\u53c2\u6570\u5bf9\u4e8eMySQL\u7684\u6027\u80fd\u6709\u91cd\u8981\u7684\u5f71\u54cd\uff0c\u4e0b\u9762\u5c06\u4ecb\u7ecd\u4e00 &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"http:\/\/www.weijing.co\/?p=5346\"> <span class=\"screen-reader-text\">MySQL Linux \u5185\u6838\u53c2\u6570\u8c03\u4f18<\/span> \u67e5\u770b\u5168\u6587 &raquo;<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":""},"categories":[90,88],"tags":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"mailpoet_newsletter_max":false,"woocommerce_thumbnail":false,"woocommerce_single":false,"woocommerce_gallery_thumbnail":false,"shop_catalog":false,"shop_single":false,"shop_thumbnail":false},"uagb_author_info":{"display_name":"weijing","author_link":"http:\/\/www.weijing.co\/?author=4"},"uagb_comment_info":0,"uagb_excerpt":"\u5927\u591a\u6570MySQL\u8fd0\u884c\u5728Linux\u64cd\u4f5c\u7cfb\u7edf\u4e4b\u4e0a\uff0cLinux\u5185\u6838\u53c2\u6570\u5bf9\u4e8eMySQL\u7684\u6027\u80fd\u6709\u91cd\u8981\u7684\u5f71\u54cd\uff0c\u4e0b\u9762\u5c06\u4ecb\u7ecd\u4e00&hellip;","_links":{"self":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/5346"}],"collection":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5346"}],"version-history":[{"count":0,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/5346\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5346"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5346"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5346"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}