{"id":434,"date":"2013-09-30T09:25:00","date_gmt":"2014-04-30T06:53:10","guid":{"rendered":"http:\/\/www.gpfeng.com\/?p=642"},"modified":"2014-04-30T14:53:10","modified_gmt":"2014-04-30T06:53:10","slug":"mysql-threads-running-control","status":"publish","type":"post","link":"http:\/\/www.gpfeng.com\/?p=434","title":{"rendered":"MySQL threads running control"},"content":{"rendered":"<h3>\u95ee\u9898\u80cc\u666f<\/h3>\n<p>\u7ebf\u4e0aMySQL\u7ecf\u5e38\u9047\u5230threads_running\u98d9\u9ad8\u7684\u60c5\u51b5\uff0c\u5f80\u5f80\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cMySQL server\u4f1a\u8868\u73b0\u51fahang\u4f4f\u7684\u5047\u8c61\uff0c\u5176\u5b9ethreads_running\u662f\u4e00\u79cd\u7ed3\u679c\uff0c\u8868\u793a\u95ee\u9898\u5df2\u7ecf\u53d1\u751f\u4e86\uff0c\u5982\u679c\u6b64\u65f6\u4e0d\u627e\u51fa\u95ee\u9898\u539f\u56e0\u91c7\u53d6\u63aa\u65bd\uff0c\u4f1a\u5f71\u54cd\u5230\u7ebf\u4e0a\u5e94\u7528\uff0c\u4e3a\u6b64\u6211\u4eec\u5f00\u53d1\u4e86MySQL threads running control\u7279\u6027\uff0c\u76d1\u6d4bthreads_running\uff0c\u5f53\u53d1\u73b0\u5176\u8d85\u8fc7\u4e00\u4e2a\u9608\u503c\u65f6\uff0cserver\u6682\u65f6\u62d2\u7edd\u670d\u52a1\uff0c\u907f\u514d\u5f15\u8d77\u96ea\u5d29\uff0c\u5f85threads_running\u4e0b\u964d\u540e\u6b63\u5e38\u670d\u52a1\u3002<\/p>\n<h3>\u4ec0\u4e48\u662fthreads_running<\/h3>\n<p>threads_running\u662fMySQL\u4e00\u4e2a\u91cd\u8981\u7684\u5b9e\u65f6\u8fd0\u884c\u72b6\u6001\u53c2\u6570\uff0c\u901a\u8fc7<\/p>\n<pre lang=\"mysql\">SHOW STATUS LIKE \u2018threads_running\u2019;<\/pre>\n<p>\u53ef\u4ee5\u67e5\u5230\uff0c\u5b83\u4ee3\u8868\u7684\u610f\u4e49\uff1a<strong>\u5f53\u524d\u5e76\u53d1\u6267\u884c\u7684statement\/command\u7684\u6570\u76ee<\/strong>\uff0c\u6bcf\u4e2astatement\/command\u5f00\u59cb\u6267\u884c\u4e4b\u524d\u5c06\u5176\u589e\u52a01\uff0c\u6267\u884c\u7ed3\u675f\u540e\u51cf1\uff0c\u4ee3\u7801\u4e2d\u7684\u903b\u8f91\uff1a<!--more--><\/p>\n<pre lang=\"c\">\r\ndo_command\r\n|-->dispatch_command\r\n    ...\r\n    inc_thread_running\r\n    ...\r\n    mysql_execute_command or execute_some_command\r\n    ...\r\n    dec_thread_running\r\n    ...\r\n<\/pre>\n<p>threads_running\u98d9\u9ad8\u8868\u793aserver\u76ee\u524d\u538b\u529b\u8f83\u5927\uff0c\u4e00\u822c\u662f\u5ba2\u6237\u7aef\u538b\u529b\u7a81\u589e\/IO\u95ee\u9898\/CPU\u95ee\u9898\/\u5f02\u5e38SQL\u7b49\u539f\u56e0\u5f15\u8d77\uff0c\u9700\u8981\u5b9a\u4f4d\u95ee\u9898\u6e90\u5934\u5e76\u9a6c\u4e0a\u89e3\u51b3\uff0c\u5426\u5219\u4e0a\u5c42\u5e94\u7528\u53d7\u5230\u66f4\u5927\u5f71\u54cd\uff0c\u4e3a\u4e86\u907f\u514dhang\u4f4f\uff0c\u8fd9\u65f6\u6700\u597d\u7684\u9009\u62e9\u662f\u8ba9server\u6682\u65f6\u201c\u62d2\u8f7d\u201d<\/p>\n<h3>threads running control<\/h3>\n<p>\u6211\u4eec\u4e3a\u6b64\u5f00\u53d1\u4e86\u8fd9\u6837\u4e00\u4e2a\u7279\u6027\uff1a<br \/>\n1. \u8bbe\u7f6e\u4e24\u4e2a\u9608\u503c\uff0clow_watermark\u548chigh_watermark\u548c\u53e6\u5916\u4e00\u4e2athreads_running_ctl_mode<br \/>\n2. \u6211\u4eec\u76d1\u6d4b\u7cfb\u7edfthreads_running\u72b6\u6001\uff0c\u5728\u6267\u884cquery\u4e4b\u524d\uff0c\u6bd4\u8f83\u4e00\u4e0b\u5f53\u524dthreads_running\u662f\u5426\u8d85\u8fc7high_watermark\u9608\u503c\uff0c\u5982\u8d85\u8fc7\u76f4\u62d2\u7edd\u6267\u884csql\uff0c\u8fd4\u56de\u5ba2\u6237\u7aef\uff1aMySQL Server is too busy\uff0c\u82e5\u5f53\u524dthreads_running\u4f4d\u4e8ehigh_watermark\u548clow_watermark\u4e4b\u95f4\uff0csleep\u4e00\u6bb5\u65f6\u95f4(5ms)\u540e\u91cd\u65b0\u8fdb\u5165\u5224\u65ad\u903b\u8f91\uff0c\u82e5query\u6ca1\u6709\u88ab\u62d2\u7edd\u6267\u884c\u5e76\u4e14\u7d2f\u8ba1sleep\u8fbe\u5230100ms\u540e\uff0cserver\u5c06\u63a5\u53d7\u5e76\u6267\u884c<br \/>\n3. threads_running_ctl_mode\u63a7\u5236\u6536\u5230\u5f71\u54cd\u7684query\u7c7b\u578b\uff0c\u67092\u4e2a\u53d6\u503c\uff1aSELECTS\/ALL\uff0c\u9ed8\u8ba4\u4e3aSELECTS\uff0c\u8868\u793a\u53ea\u5f71\u54cdSELECT\u8bed\u53e5<br \/>\n4. \u5bf9\u4e8e\u5df2\u7ecf\u5f00\u542f\u7684\u4e8b\u52a1\u548cSUPER\u6743\u9650\u7528\u6237\uff0c\u4e0d\u505a\u9650\u5236<\/p>\n<h3>threads running control\u6548\u679c<\/h3>\n<h4>1000\u4e2a\u5e76\u53d1\uff0cthreads_running\u98d9\u52301000<\/h4>\n<href a=\"http:\/\/www.gpfeng.com\/wp-content\/uploads\/2013\/09\/threads_running_ctl_default.jpg\"><img decoding=\"async\" src=\"https:\/\/i0.wp.com\/www.gpfeng.com\/wp-content\/uploads\/2013\/09\/threads_running_ctl_default.jpg?w=660\" alt=\"threads_running_ctl_default\" data-recalc-dims=\"1\"><\/a><\/p>\n<h4>1000\u4e2a\u5e76\u53d1\uff0c\u8bbe\u7f6ethreads_running_high_watermark=500\uff0cthreads_running\u7ef4\u6301\u5728500<\/h4>\n<href a=\"http:\/\/www.gpfeng.com\/wp-content\/uploads\/2013\/09\/threads_running_ctl_500.jpg\"><img decoding=\"async\" src=\"https:\/\/i0.wp.com\/www.gpfeng.com\/wp-content\/uploads\/2013\/09\/threads_running_ctl_500.jpg?w=660\" alt=\"threads_running_ctl_500\" data-recalc-dims=\"1\"><\/a><\/p>\n<h4>patch\u4e0b\u8f7d<\/h4>\n<p><a href=\"http:\/\/www.gpfeng.com\/wp-content\/uploads\/2013\/09\/threads_running_control.txt\">thread_running_ctl.patch<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u95ee\u9898\u80cc\u666f \u7ebf\u4e0aMySQL\u7ecf\u5e38\u9047\u5230threads_running\u98d9\u9ad8\u7684\u60c5\u51b5\uff0c\u5f80\u5f80\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cMySQL ser &hellip; <a href=\"http:\/\/www.gpfeng.com\/?p=434\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">MySQL threads running control<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[],"tags":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p3tPZp-70","jetpack_sharing_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"http:\/\/www.gpfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/434"}],"collection":[{"href":"http:\/\/www.gpfeng.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.gpfeng.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.gpfeng.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.gpfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=434"}],"version-history":[{"count":0,"href":"http:\/\/www.gpfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/434\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.gpfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=434"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.gpfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=434"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.gpfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=434"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}