{"id":11,"date":"2022-01-24T15:03:07","date_gmt":"2022-01-24T07:03:07","guid":{"rendered":"https:\/\/wp.zjia.me\/?p=6"},"modified":"2026-06-19T21:19:24","modified_gmt":"2026-06-19T13:19:24","slug":"linux%e4%b8%adswap%e4%b8%8ememory%e5%86%85%e5%ad%98%e7%ae%80%e5%8d%95%e4%bb%8b%e7%bb%8d","status":"publish","type":"post","link":"https:\/\/blog.ttwow.top\/?p=11","title":{"rendered":"Linux\u4e2dSwap\u4e0eMemory\u5185\u5b58\u7b80\u5355\u4ecb\u7ecd"},"content":{"rendered":"<p>\u8f6c\u8f7d\uff1a<a href=\"https:\/\/www.cnblogs.com\/wzj4858\/p\/7910994.html\">https:\/\/www.cnblogs.com\/wzj4858\/p\/7910994.html<\/a><\/p>\n<h2>1.\u80cc\u666f\u4ecb\u7ecd<\/h2>\n<p>\u8fd9\u7bc7\u6587\u7ae0\u4ecb\u7ecd\u4e00\u4e0bLinux\u4e2dswap\u4e0ememory\u3002\u5bf9\u4e8ememory\u6ca1\u4ec0\u4e48\u53ef\u8bf4\u7684\u5c31\u662f\u673a\u5668\u7684\u7269\u7406\u5185\u5b58\uff0c\u8bfb\u5199\u901f\u5ea6\u4f4e\u4e8ecpu\u4e00\u4e2a\u91cf\u7ea7\uff0c\u4f46\u662f\u9ad8\u4e8e\u78c1\u76d8\u4e0d\u6b62\u4e00\u4e2a\u91cf\u7ea7\u3002\u6240\u4ee5\uff0c\u7a0b\u5e8f\u548c\u6570\u636e\u5982\u679c\u5728\u5185\u5b58\u7684\u8bdd\uff0c\u4f1a\u6709\u975e\u5e38\u5feb\u7684\u8bfb\u5199\u901f\u5ea6\u3002\u4f46\u662f\uff0c\u5185\u5b58\u7684\u9020\u4ef7\u662f\u8981\u9ad8\u4e8e\u78c1\u76d8\u7684\uff0c\u867d\u7136\u76f8\u5bf9\u6765\u8bf4\u4ef7\u683c\u4e00\u76f4\u5728\u964d\u4f4e\u3002\u9664\u6b64\u4e4b\u5916\uff0c\u5185\u5b58\u7684\u65ad\u7535\u4e22\u5931\u6570\u636e\u4e5f\u662f\u4e00\u4e2a\u539f\u56e0\u8bf4\u4e0d\u80fd\u628a\u6240\u6709\u6570\u636e\u548c\u7a0b\u5e8f\u90fd\u4fdd\u5b58\u5728\u5185\u5b58\u4e2d\u3002\u65e2\u7136\u4e0d\u80fd\u5168\u90e8\u4f7f\u7528\u5185\u5b58\uff0c\u90a3\u6570\u636e\u8fd8\u6709\u7a0b\u5e8f\u80af\u5b9a\u4e0d\u53ef\u80fd\u4e00\u76f4\u9738\u5360\u5728\u5185\u5b58\u4e2d\u3002\u5f53\u5185\u5b58\u6ca1\u6709\u53ef\u7528\u7684\uff0c\u5c31\u5fc5\u987b\u8981\u628a\u5185\u5b58\u4e2d\u4e0d\u7ecf\u5e38\u8fd0\u884c\u7684\u7a0b\u5e8f\u7ed9\u8e22\u51fa\u53bb\u3002\u4f46\u662f\u8e22\u5230\u54ea\u91cc\u53bb\uff0c\u8fd9\u65f6\u5019swap\u5c31\u51fa\u73b0\u4e86\u3002swap\u5168\u79f0\u4e3aswap place\uff0c\u5373\u4ea4\u6362\u533a\uff0c\u5f53\u5185\u5b58\u4e0d\u591f\u7684\u65f6\u5019\uff0c\u88ab\u8e22\u51fa\u7684\u8fdb\u7a0b\u88ab\u6682\u65f6\u5b58\u50a8\u5230\u4ea4\u6362\u533a\u3002\u5f53\u9700\u8981\u8fd9\u6761\u88ab\u8e22\u51fa\u7684\u8fdb\u7a0b\u7684\u65f6\u5019\uff0c\u5c31\u4ece\u4ea4\u6362\u533a\u91cd\u65b0\u52a0\u8f7d\u5230\u5185\u5b58\uff0c\u5426\u5219\u5b83\u4e0d\u4f1a\u4e3b\u52a8\u4ea4\u6362\u5230\u771f\u5b9e\u5185\u5b58\u4e2d\u3002<\/p>\n<h2>2.swap\u4ecb\u7ecd<\/h2>\n<p>\u5728\u8be6\u7ec6\u4ecb\u7ecdswap\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u77e5\u9053\u7684\u662f\u8ba1\u7b97\u673a\u5bf9\u5185\u5b58\u5206\u4e3a\u7269\u7406\u5185\u5b58\u4e0e\u865a\u62df\u5185\u5b58\uff08\u6ce8\u610f\u865a\u62df\u5185\u5b58\u548c\u865a\u62df\u5730\u5740\u7a7a\u95f4\u7684\u533a\u522b\uff09\u3002\u7269\u7406\u5185\u5b58\u5c31\u662f\u8ba1\u7b97\u673a\u7684\u5b9e\u9645\u5185\u5b58\u5927\u5c0f\uff0c\u7531RAM\u82af\u7247\u7ec4\u6210\u7684\u3002\u865a\u62df\u5185\u5b58\u5219\u662f\u865a\u62df\u51fa\u6765\u7684\u3001\u4f7f\u7528\u78c1\u76d8\u4ee3\u66ff\u5185\u5b58\u3002\u865a\u62df\u5185\u5b58\u7684\u51fa\u73b0\uff0c\u8ba9\u673a\u5668\u5185\u5b58\u4e0d\u591f\u7684\u60c5\u51b5\u5f97\u5230\u90e8\u5206\u89e3\u51b3\u3002\u5f53\u7a0b\u5e8f\u8fd0\u884c\u8d77\u6765\u7531\u64cd\u4f5c\u7cfb\u7edf\u505a\u5177\u4f53\u865a\u62df\u5185\u5b58\u5230\u7269\u7406\u5185\u5b58\u7684\u66ff\u6362\u548c\u52a0\u8f7d(\u76f8\u5e94\u7684\u9875\u4e0e\u6bb5\u7684\u865a\u62df\u5185\u5b58\u7ba1\u7406)\u3002\u8fd9\u91cc\u7684\u865a\u62df\u5185\u5b58\u5373\u6240\u8c13\u7684swap\u3002<br \/>\n\u5f53\u7528\u6237\u63d0\u4ea4\u7a0b\u5e8f\uff0c\u7136\u540e\u4ea7\u751f\u8fdb\u7a0b\uff0c\u5728\u673a\u5668\u4e0a\u8fd0\u884c\u3002\u673a\u5668\u4f1a\u5224\u65ad\u5f53\u524d\u7269\u7406\u5185\u5b58\u662f\u5426\u8fd8\u6709\u7a7a\u95f2\u5141\u8bb8\u8fdb\u7a0b\u8c03\u5165\u5185\u5b58\u8fd0\u884c\uff0c\u5982\u679c\u6709\u90a3\u4e48\u5219\u76f4\u63a5\u8c03\u5165\u5185\u5b58\u8fdb\u884c\u8fd0\u884c\uff1b\u5982\u679c\u6ca1\u6709\uff0c\u90a3\u4e48\u4f1a\u6839\u636e\u4f18\u5148\u7ea7\u9009\u62e9\u4e00\u4e2a\u8fdb\u7a0b\u6302\u8d77\uff0c\u628a\u8be5\u8fdb\u7a0b\u4ea4\u6362\u5230swap\u4e2d\u7b49\u5f85\uff0c\u7136\u540e\u628a\u65b0\u7684\u8fdb\u7a0b\u8c03\u5165\u5230\u5185\u5b58\u4e2d\u8fd0\u884c\u3002\u6839\u636e\u8fd9\u79cd\u6362\u5165\u548c\u6362\u51fa\uff0c\u5b9e\u73b0\u4e86\u5185\u5b58\u7684\u5faa\u73af\u5229\u7528\uff0c\u8ba9\u7528\u6237\u611f\u89c9\u4e0d\u5230\u5185\u5b58\u7684\u9650\u5236\u3002\u4ece\u8fd9\u4e5f\u53ef\u4ee5\u770b\u51faswap\u626e\u6f14\u4e86\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u89d2\u8272\uff0c\u5c31\u662f\u6682\u5b58\u88ab\u6362\u51fa\u7684\u8fdb\u7a0b\u3002 \u5185\u5b58\u4e0eswap\u4e4b\u95f4\u662f\u6309\u7167\u5185\u5b58\u9875\u4e3a\u5355\u4f4d\u6765\u4ea4\u6362\u6570\u636e\u7684\uff0c\u4e00\u822cLinux\u4e2d\u9875\u7684\u5927\u5c0f\u8bbe\u7f6e\u4e3a4kb\u3002\u800c\u5185\u5b58\u4e0e\u78c1\u76d8\u5219\u662f\u6309\u7167\u5757\u6765\u4ea4\u6362\u6570\u636e\u7684\u3002<\/p>\n<h2>3.swap\u7684\u8bbe\u7f6e<\/h2>\n<p>\u4ece\u4e0a\u53ef\u4ee5\u770b\u51fa\uff0c\u5f53\u7269\u7406\u5185\u5b58\u4f7f\u7528\u5b8c\u6216\u8005\u8fbe\u5230\u4e00\u5b9a\u6bd4\u4f8b\u4e4b\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528swap\u505a\u4e34\u65f6\u7684\u5185\u5b58\u4f7f\u7528\u3002\u5f53\u7269\u7406\u5185\u5b58\u548cswap\u90fd\u88ab\u4f7f\u7528\u5b8c\u90a3\u4e48\u5c31\u4f1a\u51fa\u9519\uff0cout of memory\u3002\u5bf9\u4e8e\u4f7f\u7528\u591a\u5927\u6bd4\u4f8b\u5185\u5b58\u4e4b\u540e\u5f00\u59cb\u4f7f\u7528swap\uff0c\u5728\u7cfb\u7edf\u7684\u914d\u7f6e\u6587\u4ef6\u4e2d\u53ef\u4ee5\u901a\u8fc7\u8c03\u6574\u53c2\u6570\u8fdb\u884c\u4fee\u6539\u3002cat \/proc\/sys\/vm\/swappiness 60<br \/>\n\u8be5\u53c2\u6570\u53ef\u4ee5\u4ece0-100\u8fdb\u884c\u8bbe\u7f6e\u30020\u5c31\u662f\u6700\u5927\u9650\u5ea6\u4f7f\u7528\u5185\u5b58\uff0c\u5c3d\u91cf\u4e0d\u4f7f\u7528swap\uff1b100\u5c31\u662f\u79ef\u6781\u4f7f\u7528swap\u3002\u8fd9\u4e2a\u5177\u4f53\u7684\u901a\u8fc7\u7cfb\u7edf\u7684\u7b97\u6cd5\u8fdb\u884c\u786e\u5b9a\u3002<br \/>\n\u7269\u7406\u5185\u5b58\u6211\u4eec\u662f\u65e0\u6cd5\u66f4\u6539\u7684\uff0c\u6240\u4ee5swap\u7684\u5927\u5c0f\u8bbe\u7f6e\u5c06\u4f1a\u5f71\u54cd\u5e94\u7528\u80fd\u5426\u6b63\u5e38\u8fd0\u884c\u3002\u90a3\u4e48swap\u5927\u5c0f\u5982\u4f55\u786e\u5b9a\u3002\u6839\u636ecentos\u5b98\u7f51\u4ecb\u7ecd\u53ef\u4ee5\u5f97\u51fa\u5982\u4e0b\u516c\u5f0f\uff1aM = Amount of RAM in GB, and S = Amount of swap in GB, then If M &lt; 2, S = M *2 Else S = M + 2\u3002\u800c\u4e14\u5176\u6700\u5c0f\u4e0d\u5e94\u8be5\u5c0f\u4e8e32M(never less than 32 MB.)\u3002<br \/>\nswap\u5206\u533a\u7684\u6570\u91cf\u5bf9\u6027\u80fd\u4e5f\u6709\u5f88\u5927\u7684\u5f71\u54cd\u3002\u56e0\u4e3aswap\u6bd5\u7adf\u8fd8\u662f\u4ee5\u78c1\u76d8\u6765\u4f2a\u88c5\u6210\u5185\u5b58\uff0c\u4ea4\u6362\u7684\u64cd\u4f5c\u662f\u78c1\u76d8IO\u7684\u64cd\u4f5c\u800c\u4e0d\u662f\u5185\u5b58\u7684load\u4e0estore\u64cd\u4f5c\u3002\u5982\u679c\u6709\u591a\u4e2aswap\u4ea4\u6362\u533a\uff0c\u6bcf\u4e2aswap\u4f1a\u6709\u4e00\u5b9a\u7684\u4f18\u5148\u7ea7\uff0c\u8be5\u4f18\u5148\u7ea7\u4e5f\u53ef\u4ee5\u8c03\u6574\u3002swap\u7a7a\u95f4\u7684\u5206\u914d\u4f1a\u4ee5\u8f6e\u6d41\u7684\u65b9\u5f0f\u64cd\u4f5c\u4e8e\u6240\u6709\u7684swap\uff0c\u8fd9\u6837\u4f1a\u5927\u5927\u5747\u8861IO\u7684\u8d1f\u8f7d\uff0c\u52a0\u5febswap\u4ea4\u6362\u7684\u901f\u5ea6\u3002<\/p>\n<h2>\u56db\uff1aswap\u76f8\u5173\u547d\u4ee4<\/h2>\n<p>swapon\/swapoff swap-disk_name\uff1a\u542f\u52a8\u548c\u5173\u95ed\u76f8\u5e94\u7684swap_disk_name<br \/>\nswapon -s \uff1a\u53ef\u4ee5\u67e5\u770b\u5f53\u671fswap\u7684\u4f7f\u7528\u60c5\u51b5\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7 cat \/proc\/swaps\u547d\u4ee4\u67e5\u770b<\/p>\n<p>\u53c2\u8003\u8d44\u6599\uff1a<br \/>\n\u865a\u62df\u5185\u5b58\u4ecb\u7ecd\uff1a\u865a\u62df\u5185\u5b58\u4ecb\u7ecd<br \/>\nLinux\u5185\u5b58\u4ecb\u7ecd\uff1a<a href=\"http:\/\/blog.csdn.net\/zwan0518\/article\/details\/9040467\">http:\/\/blog.csdn.net\/zwan0518\/article\/details\/9040467<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8f6c\u8f7d\uff1ahttps:\/\/www.cnblogs.com\/wzj4858\/p\/7910994.html 1.\u80cc\u666f\u4ecb [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[130],"tags":[52,74],"class_list":["post-11","post","type-post","status-publish","format-standard","hentry","category-linux-ops","tag-linux","tag-swap"],"_links":{"self":[{"href":"https:\/\/blog.ttwow.top\/index.php?rest_route=\/wp\/v2\/posts\/11","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.ttwow.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.ttwow.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.ttwow.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.ttwow.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=11"}],"version-history":[{"count":2,"href":"https:\/\/blog.ttwow.top\/index.php?rest_route=\/wp\/v2\/posts\/11\/revisions"}],"predecessor-version":[{"id":2075,"href":"https:\/\/blog.ttwow.top\/index.php?rest_route=\/wp\/v2\/posts\/11\/revisions\/2075"}],"wp:attachment":[{"href":"https:\/\/blog.ttwow.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=11"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.ttwow.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.ttwow.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}