{"id":1107,"date":"2016-08-18T18:09:53","date_gmt":"2016-08-18T10:09:53","guid":{"rendered":"http:\/\/cn.hostease.com\/xueyuan\/?p=1107"},"modified":"2024-11-16T13:47:12","modified_gmt":"2024-11-16T05:47:12","slug":"linux-%e6%98%be%e7%a4%ba%e5%86%85%e5%ad%98%e6%83%85%e5%86%b5free","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/xueyuan\/jishu\/linux\/linux-%e6%98%be%e7%a4%ba%e5%86%85%e5%ad%98%e6%83%85%e5%86%b5free\/","title":{"rendered":"Linux-\u663e\u793a\u5185\u5b58\u60c5\u51b5(free)"},"content":{"rendered":"<p>Linux\u4e2dfree\u547d\u4ee4\u53ef\u4ee5\u663e\u793alinux\u7cfb\u7edf\u4e2d\u7a7a\u95f2\u7684\u3001\u5df2\u7528\u7684\u7269\u7406\u5185\u5b58\u53caswap\u5185\u5b58,\u53ca\u88ab\u5185\u6838\u4f7f\u7528\u7684buffer. \u5728Linux\u7cfb\u7edf\u76d1\u63a7\u7684\u5de5\u5177\u4e2d,free\u547d\u4ee4\u662f\u6700\u7ecf\u5e38\u4f7f\u7528\u7684\u547d\u4ee4\u4e4b\u4e00.<\/p>\n<p>&nbsp;<\/p>\n<p>\u547d\u4ee4\u683c\u5f0f :<\/p>\n<p>free [-b|-k|-m|-g] [-l] [-o] [-t] [-s delay] [-c count] [-V]<\/p>\n<p>&nbsp;<\/p>\n<p>\u547d\u4ee4\u529f\u80fd :<\/p>\n<p>free \u547d\u4ee4\u663e\u793a\u7cfb\u7edf\u4f7f\u7528\u548c\u7a7a\u95f2\u7684\u5185\u5b58\u60c5\u51b5,\u5305\u62ec\u7269\u7406\u5185\u5b58\u3001\u4ea4\u4e92\u533a\u5185\u5b58(swap)\u548c\u5185\u6838\u7f13\u51b2\u533a\u5185\u5b58,\u5171\u4eab\u5185\u5b58\u5c06\u88ab\u5ffd\u7565.<\/p>\n<p>&nbsp;<\/p>\n<p>\u547d\u4ee4\u53c2\u6570 :<\/p>\n<p>-b\/-k\/-m\/g\u00a0\u00a0==&gt; \u5206\u522b\u4ee5Byte\/KB\/MB\/GB\u4e3a\u5355\u4f4d\u663e\u793a\u5185\u5b58\u4f7f\u7528\u60c5\u51b5;<\/p>\n<p>-l ==&gt; \u663e\u793a\u8be6\u7ec6\u7684low \u548chigh\u7684\u5185\u5b58\u7edf\u8ba1\u60c5\u51b5;<\/p>\n<p>-o ==&gt; \u4e0d\u663e\u793a\u7f13\u5b58\u533a(-\/+ buffers\/cache);<\/p>\n<p>-t\u00a0==&gt; \u663e\u793a\u5185\u5b58\u603b\u548c\u5217;<\/p>\n<p>-s &lt;delay(\u95f4\u9694\u79d2\u6570)&gt;\u00a0==&gt; \u6301\u7eed\u89c2\u5bdf\u5185\u5b58\u4f7f\u7528\u60c5\u51b5;<\/p>\n<p>-c&lt;count&gt;\u00a0\u00a0==&gt;\u663e\u793a\u66f4\u65b0\u6b21\u6570;<\/p>\n<p>-V ==&gt; \u663e\u793a\u7248\u672c\u4fe1\u606f;<\/p>\n<p>&nbsp;<\/p>\n<p>free\u6570\u503c\u8bf4\u660e :<\/p>\n<p><a href=\"https:\/\/cn.hostease.com\/xueyuan\/wp-content\/uploads\/2016\/08\/\u56fe\u72471-2.png\" rel=\"attachment wp-att-1108\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-1108\" src=\"https:\/\/cn.hostease.com\/xueyuan\/wp-content\/uploads\/2016\/08\/\u56fe\u72471-2-300x42.png\" alt=\"\u56fe\u72471\" width=\"300\" height=\"42\" srcset=\"https:\/\/cn.hostease.com\/xueyuan\/wp-content\/uploads\/2016\/08\/\u56fe\u72471-2-300x42.png 300w, https:\/\/cn.hostease.com\/xueyuan\/wp-content\/uploads\/2016\/08\/\u56fe\u72471-2.png 532w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>total ==&gt; \u603b\u8ba1\u7269\u7406\u5185\u5b58\u7684\u5927\u5c0f;<\/p>\n<p>used ==&gt; \u5df2\u4f7f\u7528\u5185\u5b58\u5927\u5c0f;<\/p>\n<p>free ==&gt; \u7a7a\u95f2\u5185\u5b58\u5927\u5c0f;<\/p>\n<p>shared\u00a0==&gt; \u591a\u4e2a\u8fdb\u7a0b\u5171\u4eab\u7684\u5185\u5b58\u603b\u989d;<\/p>\n<p>buffer\/cached\u00a0==&gt; \u78c1\u76d8\u7f13\u5b58\u7684\u5927\u5c0f;<\/p>\n<p>&nbsp;<\/p>\n<p>\u6ce8\u610f:<\/p>\n<p>\u7b2c\u4e8c\u884c(Mem)\u7684used\/free \u4e0e\u7b2c\u4e09\u884c(-\/+ buffer\/cache)\u7684 used\/free\u533a\u522b : \u201c\u4f7f\u7528\u89d2\u5ea6\u201d<\/p>\n<p>\u7b2c\u4e8c\u884c\u662f\u4ece\u201dOS\u201d\u7684\u89d2\u5ea6\u6765\u770b,\u56e0\u4e3a\u5bf9\u4e8eOS,buffer\/cache\u90fd\u662f\u5c5e\u4e8e\u88ab\u4f7f\u7528,\u6240\u4ee5\u5b83\u7684\u53ef\u7528\u5185\u5b58\u662f1235900,\u5df2\u7528\u5185\u5b58\u662f686824,\u5176\u4e2d\u5305\u62ec,\u5185\u6838(OS)\u4f7f\u7528+Application(\u5e94\u7528\u7a0b\u5e8f)\u4f7f\u7528+buffers+cached.<\/p>\n<p>\u7b2c\u4e09\u884c\u6240\u6307\u7684\u662f\u4ece\u201c\u5e94\u7528\u7a0b\u5e8f\u201d\u89d2\u5ea6\u6765\u770b,\u5bf9\u4e8e\u5e94\u7528\u7a0b\u5e8f\u6765\u8bf4,buffer\/cached\u662f\u7b49\u4e8e\u53ef\u7528\u7684,\u56e0\u4e3abuffer\/cached\u662f\u4e3a\u4e86\u63d0\u9ad8\u6587\u4ef6\u8bfb\u53d6\u7684\u6027\u80fd,\u5f53\u5e94\u7528\u7a0b\u5e8f\u9700\u5728\u7528\u5230\u5185\u5b58\u7684\u65f6\u5019,buffer\/cached\u4f1a\u5f88\u5feb\u5730\u88ab\u56de\u6536.\u6240\u4ee5\u4ece\u5e94\u7528\u7a0b\u5e8f\u7684\u89d2\u5ea6\u6765\u8bf4,\u53ef\u7528\u5185\u5b58=\u7cfb\u7edffree +buffers + cached.\u4f8b\u5982\u672c\u673a : 1725388=1235932+48736+440752.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>buffers\u4e0ecached\u533a\u522b :<\/p>\n<p>cached : \u9ad8\u901f\u7f13\u5b58,\u662f\u4f4d\u4e8eCPU\u4e0e\u4e3b\u5185\u5b58\u95f4\u7684\u4e00\u79cd\u5bb9\u91cf\u8f83\u5c0f\u4f46\u901f\u5ea6\u5f88\u9ad8\u7684\u5b58\u50a8\u5668;<\/p>\n<p>buffers : \u7f13\u51b2\u533a,\u4e00\u4e2a\u7528\u4e8e\u5b58\u50a8\u901f\u5ea6\u4e0d\u540c\u6b65\u7684\u8bbe\u5907\u6216\u4f18\u5148\u7ea7\u4e0d\u540c\u7684\u8bbe\u5907\u4e4b\u95f4\u7684\u4f20\u8f93\u6570\u636e\u7684\u533a\u57df;<\/p>\n<p>\u4e24\u8005\u90fd\u662fRAM\u4e2d\u7684\u6570\u636e,\u7b80\u5355\u6765\u8bf4,buffers\u662f\u5373\u5c06\u88ab\u5199\u5165\u78c1\u76d8\u7684,\u800ccache\u662f\u88ab\u4ece\u78c1\u76d8\u4e2d\u8bfb\u51fa\u6765\u7684.<\/p>\n<p>&nbsp;<\/p>\n<p>buffers\u662f\u7531\u5404\u79cd\u8fdb\u7a0b\u5206\u914d\u7684,\u7531\u8fdb\u7a0b\u548c\u7cfb\u7edf\u4e00\u8d77\u7ba1\u7406.\u88ab\u7528\u5728\u5982\u8f93\u5165\u961f\u5217\u7b49\u65b9\u9762,\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50,\u5982\u67d0\u4e2a\u8fdb\u7a0b\u8981\u6c42\u6709\u591a\u4e2a\u5b57\u6bb5\u8bfb\u5165,\u5728\u6240\u6709\u5b57\u6bb5\u88ab\u8bfb\u5165\u5b8c\u6574\u4e4b\u524d,\u8fdb\u7a0b\u628a\u5148\u524d\u8bfb\u5165\u7684\u5b57\u6bb5\u653e\u5728buffer\u4e2d\u4fdd\u5b58;<\/p>\n<p>cached \u7ecf\u5e38\u88ab\u7528\u5728\u78c1\u76d8\u7684I\/O\u8bf7\u6c42\u4e0a,\u5982\u679c\u6709\u591a\u4e2a\u8fdb\u7a0b\u90fd\u8981\u8bbf\u95ee\u67d0\u4e2a\u6587\u4ef6,\u4e8e\u662f\u8be5\u6587\u4ef6\u4fbf\u88ab\u505a\u6210cache\u4ee5\u65b9\u4fbf\u4e0b\u6b21\u88ab\u8bbf\u95ee,\u8fd9\u6837\u53ef\u63d0\u4f9b\u7cfb\u7edf\u6027\u80fd;<\/p>\n<p>\u7efc\u4e0a\u6240\u8ff0\u53ef\u4ee5\u7406\u89e3\u4e3acache\u7cfb\u7edf\u7ba1\u7406,buffer\u7531\u8fdb\u7a0bcheck\u7cfb\u7edf\u4e00\u8d77\u7ba1\u7406.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Linux\u4e2dfree\u547d\u4ee4\u53ef\u4ee5\u663e\u793alinux\u7cfb\u7edf\u4e2d\u7a7a\u95f2\u7684\u3001\u5df2\u7528\u7684\u7269\u7406\u5185\u5b58\u53caswap\u5185\u5b58,\u53ca\u88ab\u5185\u6838\u4f7f\u7528\u7684buffe &#8230; <a title=\"Linux-\u663e\u793a\u5185\u5b58\u60c5\u51b5(free)\" class=\"read-more\" href=\"https:\/\/cn.hostease.com\/xueyuan\/jishu\/linux\/linux-%e6%98%be%e7%a4%ba%e5%86%85%e5%ad%98%e6%83%85%e5%86%b5free\/\" aria-label=\"\u9605\u8bfb Linux-\u663e\u793a\u5185\u5b58\u60c5\u51b5(free)\">\u9605\u8bfb\u66f4\u591a<\/a><\/p>\n","protected":false},"author":1,"featured_media":1108,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[49],"tags":[1703,1702,1576],"class_list":["post-1107","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-linux","tag-free","tag-linux"],"aioseo_notices":[],"jetpack_featured_media_url":"https:\/\/cn.hostease.com\/xueyuan\/wp-content\/uploads\/2016\/08\/\u56fe\u72471-2.png","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/1107","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/comments?post=1107"}],"version-history":[{"count":1,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/1107\/revisions"}],"predecessor-version":[{"id":1109,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/1107\/revisions\/1109"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/media\/1108"}],"wp:attachment":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/media?parent=1107"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/categories?post=1107"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/tags?post=1107"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}