{"id":1038,"date":"2018-07-11T15:59:44","date_gmt":"2018-07-11T07:59:44","guid":{"rendered":"http:\/\/www.821121.com\/?p=1038"},"modified":"2020-12-11T16:10:45","modified_gmt":"2020-12-11T08:10:45","slug":"%e6%89%8b%e5%b7%a5%e9%87%8a%e6%94%belinux%e5%86%85%e5%ad%98%e4%b8%ad%e7%9a%84cached-%e6%88%96%e8%80%85-buff-cache","status":"publish","type":"post","link":"http:\/\/www.821121.com\/?p=1038","title":{"rendered":"\u624b\u5de5\u91ca\u653elinux\u5185\u5b58\u4e2d\u7684cached \u6216\u8005 buff\/cache"},"content":{"rendered":"<p>\u5728\u65e5\u5e38\u7ef4\u62a4\u8fc7\u7a0b\u4e2d\uff0c\u7528free\u547d\u4ee4\u67e5\u770blinux\u7cfb\u7edf\u7684\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\uff0c\u7ecf\u5e38\u53d1\u73b0cached \u6216\u8005 buff\/cache\u5360\u7528\u4e86\u8f83\u591a\u7684\u5185\u5b58\u800c\u6ca1\u6709\u91ca\u653e\u3002<br \/>\n\u4f8b\u5982linux6\uff1a<\/p>\n<pre><code class=\"language-sql\">[root@rac1 ~]# free -m\n             total       used       free     shared    buffers     cached\nMem:          2871       2658        212        641         85       1169\n-\/+ buffers\/cache:       1403       1467\nSwap:         3007          0       3007<\/code><\/pre>\n<p>\u6216\u8005linux7\uff1a<\/p>\n<pre><code class=\"language-sql\">[root@cat1 ~]# free -m\n              total        used        free      shared  buff\/cache   available\nMem:          11996        2787        6540        2044        2668        6578\nSwap:          6143           0        6143<\/code><\/pre>\n<p>\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u53ef\u4ee5\u6709\u6548\u7684\u6e05\u7406cached \u6216\u8005 buff\/cache\u4e2d\u5360\u7528\u7684\u5185\u5b58\u3002<\/p>\n<pre><code class=\"language-sql\">echo 1 &gt; \/proc\/sys\/vm\/drop_caches<\/code><\/pre>\n<p>\u8be5\u547d\u4ee4\u53ef\u4ee5\u5728\u6570\u636e\u5e93\u6b63\u5e38\u8fd0\u884c\u7684\u60c5\u51b5\u4e0b\u6267\u884c\u800c\u4e0d\u5f71\u54cd\u4e1a\u52a1\u6b63\u5e38\u8fd0\u884c\uff0c\u8be5\u547d\u4ee4\u4f1a\u5360\u7528\u70b9\u8d44\u6e90\uff0c\u60c5\u51b5\u5141\u8bb8\u7684\u8bdd\uff0c\u5efa\u8bae\u5728\u4e1a\u52a1\u95f2\u65f6\u64cd\u4f5c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u65e5\u5e38\u7ef4\u62a4\u8fc7\u7a0b\u4e2d\uff0c\u7528free\u547d\u4ee4\u67e5\u770blinux\u7cfb\u7edf<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[33],"tags":[],"class_list":["post-1038","post","type-post","status-publish","format-standard","hentry","category-linux"],"_links":{"self":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1038","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1038"}],"version-history":[{"count":1,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1038\/revisions"}],"predecessor-version":[{"id":1039,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1038\/revisions\/1039"}],"wp:attachment":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1038"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1038"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1038"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}