{"id":852,"date":"2020-07-01T09:09:05","date_gmt":"2020-07-01T09:09:05","guid":{"rendered":"http:\/\/www.liutianfeng.com\/?p=852"},"modified":"2020-07-01T09:35:15","modified_gmt":"2020-07-01T09:35:15","slug":"linux%e7%b3%bb%e7%bb%9f%e8%bf%9b%e9%98%b6","status":"publish","type":"post","link":"https:\/\/www.liutianfeng.com\/?p=852","title":{"rendered":"Linux\u7cfb\u7edf\u8fdb\u9636"},"content":{"rendered":"<p>\u8fd0\u7ef4\u8fc7\u7a0b\u4e2d\uff0c\u7ecf\u5e38\u9047\u5230\u7cfb\u7edf\u5f02\u5e38\u5361\u987f\u3001\u7f13\u6162\u7684\u60c5\u51b5\uff0c\u8fd9\u65f6\u5019\uff0c\u5c31\u9700\u8981\u53bb\u6392\u67e5\u4e00\u4e0b\u5361\u987f\u7684\u539f\u56e0\u3002<\/p>\n<h4>1. \u67e5\u770b\u7cfb\u7edf\u7684\u57fa\u672c\u8d1f\u8f7d<\/h4>\n<pre class=\"pure-highlightjs\"><code class=\"\"># free -g \r\n\u67e5\u770b\u7cfb\u7edf\u7684\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\r\n# df -h\r\n\u68c0\u67e5\u662f\u5426\u6709\u78c1\u76d8\u7206\u6ee1\u7684\u60c5\u51b5\r\n# iotop\r\n\u68c0\u67e5\u78c1\u76d8\u7684\u8bfb\u5199\u662f\u5426\u8dd1\u6ee1\uff0c\u5982\u679c\u6709atop\u4e5f\u53ef\u4ee5\u4f7f\u7528atop\r\nTotal DISK READ :      17.93 K\/s | Total DISK WRITE :      75.14 K\/s\r\nActual DISK READ:      18.78 K\/s | Actual DISK WRITE:     198.94 K\/s\r\n# top\r\n\u67e5\u770bcpu\u7684\u4f7f\u7528\u60c5\u51b5\uff0c\u4e3b\u8981\u770bidle\u7684\u503c\u3002\r\n<\/code><\/pre>\n<h4>2. \u67e5\u770b\u8fdb\u7a0b\u6570\u3001\u6587\u4ef6\u63cf\u8ff0\u7b26\u6570\u7b49\u5176\u4ed6\u7cfb\u7edf\u8d1f\u8f7d<\/h4>\n<pre class=\"pure-highlightjs\"><code class=\"\"># lsof |wc -l   # \u67e5\u770b\u6587\u4ef6\u63cf\u8ff0\u7b26\u6253\u5f00\u6570\u91cf\r\n# ulimit -n     # \u67e5\u770b\u6587\u4ef6\u63cf\u8ff0\u7b26\u6253\u5f00\u6700\u5927\u5b9a\u4e49\u6570\u91cf\uff0c\u6bd4\u5bf9\u4e0a\u9762\u7684\u503c\r\n# ps -x |wc -l\r\n\u67e5\u770b\u6253\u5f00\u7684\u8fdb\u7a0b\u6570\u91cf\r\n# netstat -n |wc -l\r\n\u67e5\u770b\u7cfb\u7edf\u5efa\u7acb\u7684\u8fde\u63a5\u6570<\/code><\/pre>\n<p>&nbsp;<\/p>\n<p><strong>\u67e5\u770b\u6253\u5f00\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u6570\u91cf\uff1a<\/strong><\/p>\n<pre class=\"pure-highlightjs\"><code class=\"\"># cat \/proc\/sys\/fs\/file-nr \r\n1216    0       197787\r\n\u7b2c\u4e00\u5217\uff1a\u4e3a\u5df2\u5206\u914d\u7684FD\u6570\u91cf\r\n\u7b2c\u4e8c\u5217\uff1a\u4e3a\u5df2\u5206\u914d\u4f46\u5c1a\u672a\u4f7f\u7528\u7684FD\u6570\u91cf\r\n\u7b2c\u4e09\u5217\uff1a\u4e3a\u7cfb\u7edf\u53ef\u7528\u7684\u6700\u5927FD\u6570\u91cf\r\n\u6ce8\u610f\uff1a\u8fd9\u4e9b\u6570\u503c\u662f\u7cfb\u7edf\u5c42\u9762\u7684\u3002\r\n\r\n# lsof |wc -l           # <strong>\u83b7\u53d6\u6574\u4e2a\u7cfb\u7edf\u6253\u5f00\u7684\u6587\u4ef6\u6570\u91cf<\/strong>\r\n#\u00a0lsof\u00a0-u\u00a0user1\u00a0|wc\u00a0-l\u00a0 # <strong>\u83b7\u53d6\u67d0\u7528\u6237\u6253\u5f00\u7684\u6587\u4ef6\u6570\u91cf\r\n<\/strong>#\u00a0lsof\u00a0-p 1111\u00a0|wc\u00a0-l<strong>\u00a0  # \u83b7\u53d6\u67d0\u8fdb\u7a0b\u6253\u5f00\u7684\u6587\u4ef6\u6570\u91cf\r\n<\/strong># ls \/proc\/105060\/fd\/ |wc -l<strong>  # fd\u91cc\u9762\uff0c\u6bcf\u4e00\u6761\u8bb0\u5f55\u5360\u7528\u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\r\n<\/strong><\/code><\/pre>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>\u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff1a<a href=\"https:\/\/www.liutianfeng.com\">liutianfeng.com<\/a> &raquo; <a href=\"https:\/\/www.liutianfeng.com\/?p=852\">Linux\u7cfb\u7edf\u8fdb\u9636<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>\u8fd0\u7ef4\u8fc7\u7a0b\u4e2d\uff0c\u7ecf\u5e38\u9047\u5230\u7cfb\u7edf\u5f02\u5e38\u5361\u987f\u3001\u7f13\u6162\u7684\u60c5\u51b5\uff0c\u8fd9\u65f6\u5019\uff0c\u5c31\u9700\u8981\u53bb\u6392\u67e5\u4e00\u4e0b\u5361\u987f\u7684\u539f\u56e0\u3002 1. \u67e5\u770b\u7cfb\u7edf\u7684\u57fa\u672c\u8d1f\u8f7d  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/852"}],"collection":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=852"}],"version-history":[{"count":3,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/852\/revisions"}],"predecessor-version":[{"id":855,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/852\/revisions\/855"}],"wp:attachment":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=852"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=852"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=852"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}