{"id":8162,"date":"2021-04-21T09:52:10","date_gmt":"2021-04-21T01:52:10","guid":{"rendered":"https:\/\/blog.hoyo.idv.tw\/?p=8162"},"modified":"2021-07-08T08:31:16","modified_gmt":"2021-07-08T00:31:16","slug":"%e5%a4%a7%e9%87%8f-3306-time_wait-%e7%9a%84%e9%82%aa%e9%81%93%e8%a7%a3%e6%b3%95","status":"publish","type":"post","link":"https:\/\/blog.hoyo.idv.tw\/?p=8162","title":{"rendered":"\u5927\u91cf 3306 TIME_WAIT \u7684\u90aa\u9053\u89e3\u6cd5"},"content":{"rendered":"<p>--<\/p>\n<p>\u4e0d\u77e5\u9053\u6703\u4e0d\u6703\u884d\u751f\u5176\u4ed6\u554f\u984c\uff0c\u6709\u5f8c\u7e8c\u72c0\u6cc1\u518d\u66f4\u65b0<\/p>\n<p>--<\/p>\n<pre class=\"lang:default decode:true\"># netstat -anltp<\/pre>\n<p>\u51fa\u73fe\u5927\u91cf\u7684 TIME_WAIT \u5927\u6982\u9577\u9019\u6a23<\/p>\n<pre class=\"lang:default decode:true\">tcp        0      0 127.0.0.1:51724         127.0.0.1:3306          TIME_WAIT   -\r\ntcp        0      0 127.0.0.1:3306          127.0.0.1:52010         TIME_WAIT   -\r\ntcp        0      0 127.0.0.1:3306          127.0.0.1:51632         TIME_WAIT   -\r\ntcp        0      0 127.0.0.1:51904         127.0.0.1:3306          TIME_WAIT   -\r\ntcp        0      0 127.0.0.1:51410         127.0.0.1:3306          TIME_WAIT   -\r\ntcp        0      0 127.0.0.1:51836         127.0.0.1:3306          TIME_WAIT   -\r\ntcp        0      0 127.0.0.1:51442         127.0.0.1:3306          TIME_WAIT   -\r\ntcp        0      0 127.0.0.1:51936         127.0.0.1:3306          TIME_WAIT   -\r\ntcp        0      0 127.0.0.1:3306          127.0.0.1:51638         TIME_WAIT   -\r\ntcp        0      0 127.0.0.1:52066         127.0.0.1:3306          TIME_WAIT   -\r\ntcp        0      0 127.0.0.1:51306         127.0.0.1:3306          TIME_WAIT   -<\/pre>\n<p>\u901a\u5e38 Google \u627e\u5230\u7684\u8cc7\u6599\u662f\u9019\u6a23<\/p>\n<ul>\n<li><a href=\"https:\/\/www.jianshu.com\/p\/835f251e1bbc\" target=\"_blank\" rel=\"noopener\">linux \u5927\u91cf\u7684TIME_WAIT\u89e3\u51b3\u529e\u6cd5<\/a><\/li>\n<\/ul>\n<pre class=\"lang:default decode:true\">vi \/etc\/sysctl.conf\r\n\r\nnet.ipv4.tcp_syncookies = 1\r\nnet.ipv4.tcp_tw_reuse = 1\r\nnet.ipv4.tcp_tw_recycle = 1\r\nnet.ipv4.tcp_fin_timeout = 30<\/pre>\n<pre class=\"lang:default decode:true\"># sysctl -p\r\n# netstat -n | awk '\/^tcp\/ {++S[$NF]} END {for(a in S) print a, S[a]}'\r\nCLOSE_WAIT 2\r\nESTABLISHED 38\r\nTIME_WAIT 444<\/pre>\n<p>\u6703\u5674\u00a0cannot stat \/proc\/sys\/net\/ipv4\/tcp_tw_recycle: No such file or directory \u932f\u8aa4\uff0c\u800c\u4e14\u554f\u984c\u6c92\u6709\u6539\u5584\uff0c\u53ef\u4ee5\u5f97\u77e5\u95dc\u9375\u5c31\u662f\u00a0tcp_tw_recycle \u9019\u500b\u53c3\u6578\uff0c\u53ea\u597d\u7e7c\u7e8c\u627e\u7b54\u6848<\/p>\n<ul>\n<li><a href=\"https:\/\/mp.weixin.qq.com\/s?__biz=MzUxMDQxMDMyNg==&amp;mid=2247484841&amp;idx=1&amp;sn=7e0923ea9204e126003e263dc8414261&amp;chksm=f9022e90ce75a7865a985ddfb02016949b0c36a02f8fb805c957699ba64144682b9b40d58a1c\" target=\"_blank\" rel=\"noopener\">\u88ab\u629b\u5f03\u7684tcp_recycle<\/a><\/li>\n<\/ul>\n<pre class=\"lang:default decode:true\">vi \/etc\/sysctl.conf\r\n\r\nnet.ipv4.tcp_max_tw_buckets = 100<\/pre>\n<pre class=\"lang:default decode:true\"># sysctl -p\r\n# netstat -n | awk '\/^tcp\/ {++S[$NF]} END {for(a in S) print a, S[a]}'\r\nLAST_ACK 1\r\nCLOSE_WAIT 2\r\nESTABLISHED 38\r\nTIME_WAIT 100<\/pre>\n<ul>\n<li>sysctl -p \u8a2d\u5b9a\u555f\u7528<\/li>\n<\/ul>\n<p>--<\/p>\n<div class=\"pvc_clear\"><\/div>\n<p class=\"pvc_stats all \" data-element-id=\"8162\" style=\"\"><i class=\"pvc-stats-icon medium\" aria-hidden=\"true\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"far\" data-icon=\"chart-bar\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"svg-inline--fa fa-chart-bar fa-w-16 fa-2x\"><path fill=\"currentColor\" d=\"M396.8 352h22.4c6.4 0 12.8-6.4 12.8-12.8V108.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v230.4c0 6.4 6.4 12.8 12.8 12.8zm-192 0h22.4c6.4 0 12.8-6.4 12.8-12.8V140.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v198.4c0 6.4 6.4 12.8 12.8 12.8zm96 0h22.4c6.4 0 12.8-6.4 12.8-12.8V204.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v134.4c0 6.4 6.4 12.8 12.8 12.8zM496 400H48V80c0-8.84-7.16-16-16-16H16C7.16 64 0 71.16 0 80v336c0 17.67 14.33 32 32 32h464c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16zm-387.2-48h22.4c6.4 0 12.8-6.4 12.8-12.8v-70.4c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v70.4c0 6.4 6.4 12.8 12.8 12.8z\" class=\"\"><\/path><\/svg><\/i> &nbsp;2,075&nbsp;total views, &nbsp;1&nbsp;views today<\/p>\n<div class=\"pvc_clear\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>-- \u4e0d\u77e5\u9053\u6703\u4e0d\u6703\u884d\u751f\u5176\u4ed6\u554f\u984c...<\/p>\n<div class=\"pvc_clear\"><\/div>\n<p class=\"pvc_stats all \" data-element-id=\"8162\" style=\"\"><i class=\"pvc-stats-icon medium\" aria-hidden=\"true\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"far\" data-icon=\"chart-bar\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"svg-inline--fa fa-chart-bar fa-w-16 fa-2x\"><path fill=\"currentColor\" d=\"M396.8 352h22.4c6.4 0 12.8-6.4 12.8-12.8V108.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v230.4c0 6.4 6.4 12.8 12.8 12.8zm-192 0h22.4c6.4 0 12.8-6.4 12.8-12.8V140.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v198.4c0 6.4 6.4 12.8 12.8 12.8zm96 0h22.4c6.4 0 12.8-6.4 12.8-12.8V204.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v134.4c0 6.4 6.4 12.8 12.8 12.8zM496 400H48V80c0-8.84-7.16-16-16-16H16C7.16 64 0 71.16 0 80v336c0 17.67 14.33 32 32 32h464c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16zm-387.2-48h22.4c6.4 0 12.8-6.4 12.8-12.8v-70.4c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v70.4c0 6.4 6.4 12.8 12.8 12.8z\" class=\"\"><\/path><\/svg><\/i> &nbsp;2,075&nbsp;total views, &nbsp;1&nbsp;views today<\/p>\n<div class=\"pvc_clear\"><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[31],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.hoyo.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/8162"}],"collection":[{"href":"https:\/\/blog.hoyo.idv.tw\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.hoyo.idv.tw\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.hoyo.idv.tw\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.hoyo.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8162"}],"version-history":[{"count":4,"href":"https:\/\/blog.hoyo.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/8162\/revisions"}],"predecessor-version":[{"id":8529,"href":"https:\/\/blog.hoyo.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/8162\/revisions\/8529"}],"wp:attachment":[{"href":"https:\/\/blog.hoyo.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8162"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.hoyo.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8162"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.hoyo.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8162"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}