{"id":138,"date":"2018-10-16T08:41:29","date_gmt":"2018-10-16T00:41:29","guid":{"rendered":"http:\/\/www.jsjs.org\/?p=138"},"modified":"2018-10-16T08:41:29","modified_gmt":"2018-10-16T00:41:29","slug":"%e9%98%bf%e9%87%8c%e4%ba%91%e4%ba%91%e4%b8%bb%e6%9c%ba%e6%b7%bb%e5%8a%a0swap%e5%88%86%e5%8c%ba%e4%b8%8eswap%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96","status":"publish","type":"post","link":"https:\/\/blog.jsjs.org\/?p=138","title":{"rendered":"\u963f\u91cc\u4e91\u4e91\u4e3b\u673a\u6dfb\u52a0swap\u5206\u533a\u4e0eswap\u6027\u80fd\u4f18\u5316"},"content":{"rendered":"

swap\u7684\u529f\u80fd\u4e0e\u76f8\u5e94\u5185\u6838\u53c2\u6570<\/strong><\/p>\n

Linux \u5c06\u7269\u7406\u5185\u5b58\u5206\u4e3a\u5185\u5b58\u6bb5\u7684\u90e8\u5206\u88ab\u79f0\u4f5c\u201c\u9875\u9762\u201d\u3002\u4ea4\u6362\u662f\u6307\u5185\u5b58\u9875\u9762\u88ab\u590d\u5236\u5230\u9884\u5148\u8bbe\u5b9a\u597d\u7684\u786c\u76d8\u7a7a\u95f4(\u53eb\u505a\u4ea4\u6362\u7a7a\u95f4)\u7684\u8fc7\u7a0b\uff0c\u76ee\u7684\u662f\u91ca\u653e\u7528\u4e8e\u9875\u9762\u7684\u5185\u5b58\u3002\u7269\u7406\u5185\u5b58\u548c\u4ea4\u6362\u7a7a\u95f4\u7684\u603b\u5927\u5c0f\u662f\u53ef\u7528\u7684\u865a\u62df\u5185\u5b58\u7684\u603b\u91cf\u3002\u4ea4\u6362\u7a7a\u95f4\u901a\u5e38\u662f\u4e00\u4e2a\u78c1\u76d8\u5206\u533a\uff08\u6b64\u5206\u533a\u5728\u5b89\u88c5\u64cd\u4f5c\u7cfb\u7edf\u65f6\uff0c\u7cfb\u7edf\u901a\u5e38\u4f1a\u9ed8\u8ba4\u5212\u5206\u51fa\u4e00\u6bb5\u7a7a\u95f4\u7528\u4e8e\u4ea4\u6362\u5206\u533a\uff0c\u9ed8\u8ba4\u5c06\u4ea4\u6362\u7a7a\u95f4\u7684\u5927\u5c0f\u8bbe\u5b9a\u4e3a\u5185\u5b58\u76841\u500d\u52302\u500d\uff09\uff0c\u4e5f\u53ef\u4ee5\u662f\u4e00\u4e2a\u6587\u4ef6\u3002<\/p>\n

\u5185\u6838\u53c2\u6570\u4e2d\u6709\u4e00\u4e2avm.swappiness\u53c2\u6570\uff0c\u6b64\u53c2\u6570\u4ee3\u8868\u4e86\u5185\u6838\u5bf9\u4e8e\u4ea4\u6362\u7a7a\u95f4\u7684\u559c\u597d(\u6216\u538c\u6076)\u7a0b\u5ea6\u3002Swappiness \u53ef\u4ee5\u6709 0 \u5230 100 \u7684\u503c\uff0c\u9ed8\u8ba4\u7684\u5927\u5c0f\u901a\u5e38\u662f60\uff0c\u4f46\u4e5f\u6709\u7684\u662f30\u3002\u8bbe\u7f6e\u8fd9\u4e2a\u53c2\u6570\u4e3a\u8f83\u4f4e\u7684\u503c\u4f1a\u51cf\u5c11\u5185\u5b58\u7684\u4ea4\u6362\uff0c\u4ece\u800c\u63d0\u5347\u4e00\u4e9b\u7cfb\u7edf\u4e0a\u7684\u54cd\u5e94\u5ea6\u3002\u5982\u679c\u5185\u5b58\u8f83\u4e3a\u5145\u88d5\uff0c\u5219\u53ef\u4ee5\u5c06vm.swappiness\u5927\u5c0f\u8bbe\u5b9a\u4e3a30\uff0c\u5982\u679c\u5185\u5b58\u8f83\u5c11\uff0c\u53ef\u4ee5\u8bbe\u5b9a\u4e3a60\u3002\u5982\u679c\u5c06\u6b64\u6570\u503c\u8c03\u6574\u7684\u8fc7\u5927\uff0c\u53ef\u80fd\u635f\u5931\u5185\u5b58\u672c\u6765\u80fd\u63d0\u4f9b\u7684\u6027\u80fd\uff0c\u5e76\u589e\u52a0\u78c1\u76d8IO\u6d88\u8017\u548cCPU\u7684\u6d88\u8017\u3002<\/p>\n

\u5173\u4e8e\u963f\u91cc\u4e91\u4e91\u4e3b\u673aswap\u529f\u80fd<\/strong><\/p>\n

\u963f\u91cc\u4e91\u63d0\u4f9b\u7684\u4e91\u670d\u52a1\u5668\uff08Elastic Compute Service\uff0c\u7b80\u79f0 ECS\uff09\uff0c\u662f\u4e91\u4e3b\u673a\u7684\u4e00\u79cd\uff0c\u5f53\u524d\u91c7\u7528\u7684\u865a\u62df\u5316\u9a71\u52a8\u662fXen\uff08\u8fd9\u4e00\u70b9\u53ef\u4ee5\u901a\u8fc7bios vendor\u548cvirtual type\u53ef\u4ee5\u770b\u51fa\uff09\u3002<\/p>\n

\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u963f\u91cc\u4e91\u4e91\u4e3b\u673a\u7684swap\u529f\u80fd\u662f\u6ca1\u6709\u542f\u7528\u7684\uff0c\u539f\u56e0\u5f53\u7136\u662f\u901a\u8fc7\u53d6\u6d88swap\u529f\u80fd\u53ef\u4ee5\u964d\u4f4e\u78c1\u76d8IO\u7684\u5360\u7528\u7387\u6765\u8ba9\u7528\u6237\u8d2d\u4e70\u66f4\u591a\u7684\u5185\u5b58\u3001\u63d0\u9ad8\u78c1\u76d8\u5bff\u547d\u548c\u6027\u80fd\u3002<\/p>\n

\u963f\u91cc\u5f53\u524d\u7684\u505a\u6cd5\u662f\uff1a<\/p>\n

1.\u4e0d\u521b\u5efaswap\u5206\u533a\uff0c\u7531\u955c\u50cf\u51b3\u5b9a<\/p>\n

2.\u5c06vm.swappiness\u8bbe\u5b9a\u4e3a0\uff0c\u5373\u6c38\u4e0d\u4f7f\u7528swap\u5206\u533a<\/p>\n

\u542f\u7528swap\u5206\u533a\uff0c\u786e\u5b9e\u53ef\u4ee5\u964d\u4f4e\u5185\u5b58\u7684\u4f7f\u7528\u538b\u529b\uff0c\u4f46\u5e76\u4e0d\u662f\u957f\u4e45\u4e4b\u8ba1\uff0c\u5982\u679c\u4e91\u4e3b\u673a\u4e0a\u8fd0\u884c\u7684\u5e94\u7528\u786e\u5b9e\u9700\u8981\u8f83\u9ad8\u7684\u5185\u5b58\uff0c\u5efa\u8bae\u8fd8\u662f\u8d2d\u4e70\u66f4\u591a\u7684\u5185\u5b58\u3002<\/p>\n

\u5982\u4f55\u542f\u7528swap\u5206\u533a\uff1f<\/strong><\/p>\n

\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n

1.\u67e5\u770b\u5f53\u524d\u7cfb\u7edf\u4e2d\u662f\u5426\u5df2\u7ecf\u542f\u7528swap\u5206\u533a<\/p>\n

\n
\n\n\n\n
\n
1<\/div>\n
2<\/div>\n<\/td>\n
\n
\n
cat<\/code>\u00a0\/proc\/swaps<\/code><\/div>\n
top<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

2.\u5982\u679c\u6ca1\u6709\u542f\u7528swap\u5206\u533a\u529f\u80fd\uff0c\u5219\u65b0\u5efa\u4e00\u4e2a\u4e13\u95e8\u7684\u6587\u4ef6\u7528\u4e8eswap\u5206\u533a<\/p>\n

\n
\n\n\n\n
\n
1<\/div>\n<\/td>\n
\n
\n
dd<\/code>\u00a0if<\/code>=<\/code>\/dev\/zero<\/code>\u00a0of=<\/code>\/data\/swap<\/code>\u00a0bs=512\u00a0count=8388616<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u6ce8\uff1a\u6b64\u6587\u4ef6\u7684\u5927\u5c0f\u662fcount\u7684\u5927\u5c0f\u4e58\u4ee5bs\u5927\u5c0f\uff0c\u4e0a\u9762\u547d\u4ee4\u7684\u5927\u5c0f\u662f4294971392\uff0c\u53734GB<\/p>\n

3.\u901a\u8fc7mkswap\u547d\u4ee4\u5c06\u4e0a\u9762\u65b0\u5efa\u51fa\u7684\u6587\u4ef6\u505a\u6210swap\u5206\u533a<\/p>\n

\n
\n\n\n\n
\n
1<\/div>\n<\/td>\n
\n
\n
mkswap\u00a0<\/code>\/data\/swap<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

4.\u67e5\u770b\u5185\u6838\u53c2\u6570vm.swappiness\u4e2d\u7684\u6570\u503c\u662f\u5426\u4e3a0\uff0c\u5982\u679c\u4e3a0\u5219\u6839\u636e\u5b9e\u9645\u9700\u8981\u8c03\u6574\u621030\u6216\u800560<\/p>\n

\n
\n\n\n\n
\n
1<\/div>\n
2<\/div>\n
3<\/div>\n<\/td>\n
\n
\n
cat<\/code>\u00a0\/proc\/sys\/vm\/swappiness<\/code><\/div>\n
sysctl\u00a0-a\u00a0|\u00a0<\/code>grep<\/code>\u00a0swappiness\u00a0\u00a0\u00a0\u00a0<\/code><\/div>\n
sysctl\u00a0-w\u00a0vm.swappiness=60<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u6ce8\uff1a\u82e5\u60f3\u6c38\u4e45\u4fee\u6539\uff0c\u5219\u7f16\u8f91\/etc\/sysctl.conf\u6587\u4ef6<\/p>\n

5.\u542f\u7528\u6b64\u4ea4\u6362\u5206\u533a\u7684\u4ea4\u6362\u529f\u80fd<\/p>\n

\n
\n\n\n\n
\n
1<\/div>\n
2<\/div>\n<\/td>\n
\n
\n
swapon\u00a0<\/code>\/data\/swap<\/code><\/div>\n
\n

echo<\/code>\u00a0\"\/data\/swap\u00a0swap\u00a0swap\u00a0defaults\u00a0\u00a0\u00a0\u00a00\u00a0\u00a00\"<\/code>\u00a0>>\u00a0<\/code>\/etc\/fstab<\/code>%<\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

swap\u7684\u529f\u80fd\u4e0e\u76f8\u5e94\u5185\u6838\u53c2\u6570 Linux \u5c06\u7269\u7406\u5185\u5b58\u5206\u4e3a\u5185\u5b58\u6bb5\u7684\u90e8\u5206\u88ab\u79f0\u4f5c\u201c\u9875\u9762\u201d\u3002\u4ea4\u6362\u662f\u6307\u5185\u5b58\u9875\u9762\u88ab\u590d\u5236\u5230\u9884\u5148\u8bbe\u5b9a\u597d\u7684\u786c\u76d8\u7a7a\u95f4(\u53eb\u505a\u4ea4\u6362\u7a7a\u95f4)\u7684\u8fc7\u7a0b\uff0c\u76ee\u7684\u662f\u91ca\u653e\u7528\u4e8e\u9875\u9762\u7684\u5185\u5b58\u3002\u7269\u7406\u5185\u5b58\u548c\u4ea4\u6362\u7a7a\u95f4\u7684\u603b\u5927\u5c0f\u662f\u53ef\u7528\u7684\u865a\u62df\u5185\u5b58\u7684\u603b\u91cf\u3002\u4ea4\u6362\u7a7a\u95f4\u901a\u5e38\u662f\u4e00\u4e2a\u78c1\u76d8\u5206\u533a\uff08\u6b64\u5206\u533a\u5728\u5b89\u88c5\u64cd\u4f5c\u7cfb\u7edf\u65f6\uff0c\u7cfb\u7edf\u901a\u5e38\u4f1a\u9ed8\u8ba4\u5212\u5206\u51fa\u4e00\u6bb5\u7a7a\u95f4\u7528\u4e8e\u4ea4\u6362\u5206\u533a\uff0c\u9ed8\u8ba4\u5c06\u4ea4\u6362\u7a7a\u95f4\u7684\u5927\u5c0f\u8bbe\u5b9a\u4e3a\u5185\u5b58\u76841\u500d\u52302\u500d\uff09\uff0c\u4e5f\u53ef\u4ee5\u662f\u4e00\u4e2a\u6587\u4ef6\u3002 \u5185\u6838\u53c2\u6570\u4e2d\u6709\u4e00\u4e2avm.swappiness\u53c2\u6570\uff0c\u6b64\u53c2\u6570\u4ee3\u8868\u4e86\u5185\u6838\u5bf9\u4e8e\u4ea4\u6362\u7a7a\u95f4\u7684\u559c\u597d(\u6216\u538c\u6076)\u7a0b\u5ea6\u3002Swappiness \u53ef\u4ee5\u6709 0 \u5230 100 \u7684\u503c\uff0c\u9ed8\u8ba4\u7684\u5927\u5c0f\u901a\u5e38\u662f60\uff0c\u4f46\u4e5f\u6709\u7684\u662f30\u3002\u8bbe\u7f6e\u8fd9\u4e2a\u53c2\u6570\u4e3a\u8f83\u4f4e\u7684\u503c\u4f1a\u51cf\u5c11\u5185\u5b58\u7684\u4ea4\u6362\uff0c\u4ece\u800c\u63d0\u5347\u4e00\u4e9b\u7cfb\u7edf\u4e0a\u7684\u54cd\u5e94\u5ea6\u3002\u5982\u679c\u5185\u5b58\u8f83\u4e3a\u5145\u88d5\uff0c\u5219\u53ef\u4ee5\u5c06vm.swappiness\u5927\u5c0f\u8bbe\u5b9a\u4e3a30\uff0c\u5982\u679c\u5185\u5b58\u8f83\u5c11\uff0c\u53ef\u4ee5\u8bbe\u5b9a\u4e3a60\u3002\u5982\u679c\u5c06\u6b64\u6570\u503c\u8c03\u6574\u7684\u8fc7\u5927\uff0c\u53ef\u80fd\u635f\u5931\u5185\u5b58\u672c\u6765\u80fd\u63d0\u4f9b\u7684\u6027\u80fd\uff0c\u5e76\u589e\u52a0\u78c1\u76d8IO\u6d88\u8017\u548cCPU\u7684\u6d88\u8017\u3002 \u5173\u4e8e\u963f\u91cc\u4e91\u4e91\u4e3b\u673aswap\u529f\u80fd \u963f\u91cc\u4e91\u63d0\u4f9b\u7684\u4e91\u670d\u52a1\u5668\uff08Elastic Compute Service\uff0c\u7b80\u79f0 ECS\uff09\uff0c\u662f\u4e91\u4e3b\u673a\u7684\u4e00\u79cd\uff0c\u5f53\u524d\u91c7\u7528\u7684\u865a\u62df\u5316\u9a71\u52a8\u662fXen\uff08\u8fd9\u4e00\u70b9\u53ef\u4ee5\u901a\u8fc7bios vendor\u548cvirtual type\u53ef\u4ee5\u770b\u51fa\uff09\u3002 \u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u963f\u91cc\u4e91\u4e91\u4e3b\u673a\u7684swap\u529f\u80fd\u662f\u6ca1\u6709\u542f\u7528\u7684\uff0c\u539f\u56e0\u5f53\u7136\u662f\u901a\u8fc7\u53d6\u6d88swap\u529f\u80fd\u53ef\u4ee5\u964d\u4f4e\u78c1\u76d8IO\u7684\u5360\u7528\u7387\u6765\u8ba9\u7528\u6237\u8d2d\u4e70\u66f4\u591a\u7684\u5185\u5b58\u3001\u63d0\u9ad8\u78c1\u76d8\u5bff\u547d\u548c\u6027\u80fd\u3002 \u963f\u91cc\u5f53\u524d\u7684\u505a\u6cd5\u662f\uff1a 1.\u4e0d\u521b\u5efaswap\u5206\u533a\uff0c\u7531\u955c\u50cf\u51b3\u5b9a 2.\u5c06vm.swappiness\u8bbe\u5b9a\u4e3a0\uff0c\u5373\u6c38\u4e0d\u4f7f\u7528swap\u5206\u533a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-138","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=\/wp\/v2\/posts\/138","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=138"}],"version-history":[{"count":0,"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=\/wp\/v2\/posts\/138\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}