{"id":312726,"date":"2024-05-20T22:46:17","date_gmt":"2024-05-20T14:46:17","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/312726.html"},"modified":"2024-05-20T22:46:40","modified_gmt":"2024-05-20T14:46:40","slug":"centos7-%e7%b3%bb%e7%bb%9f%e4%b8%ad%e6%80%8e%e4%b9%88%e6%b7%bb%e5%8a%a0%e5%92%8c%e5%88%a0%e9%99%a4-swap-%e4%ba%a4%e6%8d%a2%e5%88%86%e5%8c%ba","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/312726.html","title":{"rendered":"Centos7 \u7cfb\u7edf\u4e2d\u600e\u4e48\u6dfb\u52a0\u548c\u5220\u9664 Swap \u4ea4\u6362\u5206\u533a"},"content":{"rendered":"

\"Centos7<\/p>\n

CentOS 7\u7cfb\u7edf\u4e2d\u6dfb\u52a0\u4e0e\u5220\u9664Swap\u4ea4\u6362\u5206\u533a\u7684\u4e3b\u8981\u6b65\u9aa4\u5305\u62ec\uff1a\u589e\u52a0Swap\u6587\u4ef6\u3001\u683c\u5f0f\u5316Swap\u6587\u4ef6\u3001\u542f\u7528Swap\u6587\u4ef6\u3001\u914d\u7f6e\u6301\u4e45\u6027Swap\u4f7f\u7528\u3001\u79fb\u9664Swap\u6587\u4ef6<\/strong>\u3002\u8981\u6dfb\u52a0Swap\uff0c\u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u4e00\u4e2a\u6587\u4ef6\u4f5c\u4e3a\u4ea4\u6362\u5206\u533a\uff0c\u683c\u5f0f\u5316\u4e3aswap\u683c\u5f0f\uff0c\u7136\u540e\u542f\u7528\u5b83\u5e76\u7f16\u8f91fstab\u6587\u4ef6\u4ee5\u786e\u4fdd\u5728\u6bcf\u6b21\u542f\u52a8\u65f6\u81ea\u52a8\u6302\u8f7d\u3002\u5220\u9664Swap\u5206\u533a\u5219\u6d89\u53ca\u76f8\u53cd\u7684\u6b65\u9aa4\uff1a\u505c\u7528\u3001\u79fb\u9664fstab\u6761\u76ee\u5e76\u5220\u9664\u6587\u4ef6\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u589e\u52a0Swap\u6587\u4ef6<\/h3>\n<\/p>\n

1. \u521b\u5efaSwap\u6587\u4ef6\uff1a<\/strong><\/p>\n

\u4f7f\u7528fallocate<\/code>\u6216dd<\/code>\u547d\u4ee4\u521b\u5efa\u4e00\u4e2a\u6307\u5b9a\u5927\u5c0f\u7684\u6587\u4ef6\u7528\u4f5c\u4ea4\u6362\u7a7a\u95f4\u3002\u4f8b\u5982\uff0c\u8981\u521b\u5efa\u4e00\u4e2a\u5927\u5c0f\u4e3a4GB\u7684Swap\u6587\u4ef6\uff1a<\/p>\n<\/p>\n

sudo fallocate -l 4G \/swapfile<\/p>\n
\u6216\u8005<\/strong><\/h2>\n
sudo dd if=\/dev\/zero of=\/swapfile bs=1G count=4<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u8bbe\u7f6e\u6b63\u786e\u7684\u6743\u9650\uff1a<\/strong><\/p>\n
\u4e3a\u4e86\u5b89\u5168\u8d77\u89c1\uff0cSwap\u6587\u4ef6\u7684\u6743\u9650\u5e94\u8be5\u88ab\u8bbe\u7f6e\u4e3a\u4ec5\u5bf9root\u7528\u6237\u53ef\u8bfb\u5199\u3002<\/p>\n<\/p>\n
sudo chmod 600 \/swapfile<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001\u683c\u5f0f\u5316Swap\u6587\u4ef6<\/h3>\n<\/p>\n
1. \u683c\u5f0f\u5316\u6587\u4ef6\u4e3aswap\u683c\u5f0f\uff1a<\/strong><\/p>\n
\u8fd9\u4f1a\u5c06\u6587\u4ef6\u8bbe\u7f6e\u4e3aswap\u683c\u5f0f\uff0c\u4ee5\u4fbf\u64cd\u4f5c\u7cfb\u7edf\u53ef\u4ee5\u5c06\u5176\u4f5c\u4e3a\u4ea4\u6362\u7a7a\u95f4\u4f7f\u7528\u3002<\/p>\n<\/p>\n
sudo mkswap \/swapfile<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u542f\u7528Swap\u6587\u4ef6\uff1a<\/strong><\/p>\n
\u683c\u5f0f\u5316\u540e\uff0c\u53ef\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u5373\u65f6\u542f\u7528\u4ea4\u6362\u7a7a\u95f4\uff1a<\/p>\n<\/p>\n
sudo swapon \/swapfile<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u914d\u7f6e\u6301\u4e45\u6027Swap\u4f7f\u7528<\/h3>\n<\/p>\n
1. \u914d\u7f6efstab\uff1a<\/strong><\/p>\n
\u4e3a\u4e86\u5728\u7cfb\u7edf\u91cd\u542f\u4e4b\u540e\u81ea\u52a8\u542f\u7528Swap\u6587\u4ef6\uff0c\u9700\u8981\u5c06\u5176\u6dfb\u52a0\u5230\/etc\/fstab<\/code>\u3002<\/p>\n<\/p>\n
echo '\/swapfile none swap sw 0 0' | sudo tee -a \/etc\/fstab<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u66f4\u65b0\u7cfb\u7edf\u53c2\u6570\uff1a<\/strong><\/p>\n
\u53ef\u80fd\u9700\u8981\u8c03\u6574swappiness<\/code>\u7684\u503c\uff0c\u8fd9\u662f\u4e00\u4e2a\u63a7\u5236\u7cfb\u7edf\u591a\u79ef\u6781\u4f7f\u7528Swap\u5206\u533a\u7684\u53c2\u6570\u3002<\/p>\n<\/p>\n
sudo sysctl vm.swappiness=10<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u56db\u3001\u79fb\u9664Swap\u6587\u4ef6<\/h3>\n<\/p>\n
1. \u505c\u7528Swap\u6587\u4ef6\uff1a<\/strong><\/p>\n
\u5728\u5220\u9664Swap\u5206\u533a\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u505c\u7528\u5b83\u3002<\/p>\n<\/p>\n
sudo swapoff -v \/swapfile<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u79fb\u9664fstab\u6761\u76ee\uff1a<\/strong><\/p>\n
\u7f16\u8f91\/etc\/fstab<\/code>\u6587\u4ef6\u5e76\u79fb\u9664\u5173\u4e8eswapfile\u7684\u884c\u3002<\/p>\n<\/p>\n
3. \u5220\u9664Swap\u6587\u4ef6\uff1a<\/strong><\/p>\n
\u4e00\u65e6\u505c\u7528\u5e76\u4ecefstab<\/code>\u4e2d\u79fb\u9664\uff0c\u5c31\u53ef\u4ee5\u5b89\u5168\u5730\u5220\u9664\u6587\u4ef6\u3002<\/p>\n<\/p>\n
sudo rm \/swapfile<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u901a\u8fc7\u4ee5\u4e0a\u6b65\u9aa4\uff0c\u53ef\u4ee5\u6839\u636e\u7cfb\u7edf\u9700\u6c42\u8c03\u6574Swap\u5206\u533a\u7684\u5927\u5c0f\u6216\u5b8c\u5168\u79fb\u9664\u5b83\uff0c\u4ece\u800c\u4e3aCentOS 7\u7cfb\u7edf\u7684\u5185\u5b58\u7ba1\u7406\u63d0\u4f9b\u7075\u6d3b\u6027\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u4f7f\u7528Swap\u5206\u533a\u4f1a\u6bd4\u4f7f\u7528\u7269\u7406\u5185\u5b58\u6162\u5f97\u591a\uff0c\u56e0\u6b64\u5b83\u9002\u7528\u4e8e\u5904\u7406\u5185\u5b58\u4f7f\u7528\u5cf0\u503c\u60c5\u51b5\uff0c\u800c\u4e0d\u662f\u4f5c\u4e3a\u5e38\u89c4\u5185\u5b58\u4f7f\u7528\u7684\u66ff\u4ee3\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. \u600e\u4e48\u5728Centos7\u7cfb\u7edf\u4e2d\u6dfb\u52a0Swap\u4ea4\u6362\u5206\u533a\uff1f<\/strong><\/p>\n
\u4e3a\u4e86\u5728Centos7\u7cfb\u7edf\u4e2d\u6dfb\u52a0Swap\u4ea4\u6362\u5206\u533a\uff0c\u4f60\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u8fdb\u884c\u64cd\u4f5c\uff1a<\/p>\n
    \n
  • \u9996\u5148\uff0c\u68c0\u67e5\u7cfb\u7edf\u662f\u5426\u5df2\u7ecf\u6709\u4e86Swap\u4ea4\u6362\u5206\u533a\uff0c\u53ef\u4ee5\u4f7f\u7528\u547d\u4ee4 swapon --show<\/code> \u8fdb\u884c\u68c0\u67e5\u3002<\/li>\n
  • \u63a5\u4e0b\u6765\uff0c\u5982\u679c\u7cfb\u7edf\u5c1a\u672a\u6709Swap\u4ea4\u6362\u5206\u533a\uff0c\u4f60\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u5927\u5c0f\u5408\u9002\u7684\u6587\u4ef6\u4f5c\u4e3aSwap\u5206\u533a\u3002\u4f7f\u7528\u547d\u4ee4 dd if=\/dev\/zero of=\/path\/to\/swapfile bs=1G count=4<\/code> \u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a4GB\u5927\u5c0f\u7684Swap\u6587\u4ef6\u3002<\/li>\n
  • \u7136\u540e\uff0c\u4f7f\u7528\u547d\u4ee4 chmod 600 \/path\/to\/swapfile<\/code> \u6765\u8bbe\u7f6eSwap\u6587\u4ef6\u7684\u6743\u9650\u3002<\/li>\n
  • \u63a5\u7740\uff0c\u4f7f\u7528\u547d\u4ee4 mkswap \/path\/to\/swapfile<\/code> \u6765\u8bbe\u7f6eSwap\u6587\u4ef6\u683c\u5f0f\u3002<\/li>\n
  • \u6700\u540e\uff0c\u4f7f\u7528\u547d\u4ee4 swapon \/path\/to\/swapfile<\/code> \u6765\u542f\u7528\u65b0\u521b\u5efa\u7684Swap\u4ea4\u6362\u5206\u533a\u3002<\/li>\n<\/ul>\n
    2. \u5982\u4f55\u5728Centos7\u7cfb\u7edf\u4e2d\u5220\u9664Swap\u4ea4\u6362\u5206\u533a\uff1f<\/strong><\/p>\n
    \u5982\u679c\u4f60\u60f3\u5728Centos7\u7cfb\u7edf\u4e2d\u5220\u9664Swap\u4ea4\u6362\u5206\u533a\uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u8fdb\u884c\u64cd\u4f5c\uff1a<\/p>\n
      \n
    • \u9996\u5148\uff0c\u505c\u7528Swap\u4ea4\u6362\u5206\u533a\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528\u547d\u4ee4 swapoff \/path\/to\/swapfile<\/code> \u6765\u505c\u7528Swap\u5206\u533a\u3002<\/li>\n
    • \u63a5\u4e0b\u6765\uff0c\u5220\u9664Swap\u6587\u4ef6\u3002\u4f7f\u7528\u547d\u4ee4 rm \/path\/to\/swapfile<\/code> \u6765\u5220\u9664Swap\u6587\u4ef6\u3002<\/li>\n
    • \u6700\u540e\uff0c\u5982\u679c\u4f60\u5e0c\u671b\u6c38\u4e45\u5730\u79fb\u9664Swap\u4ea4\u6362\u5206\u533a\uff0c\u4f60\u9700\u8981\u7f16\u8f91 \/etc\/fstab<\/code> \u6587\u4ef6\uff0c\u5e76\u5220\u9664\u5176\u4e2d\u4e0eSwap\u5206\u533a\u76f8\u5173\u7684\u884c\u3002<\/li>\n<\/ul>\n
      3. \u5728Centos7\u7cfb\u7edf\u4e2d\u5982\u4f55\u8c03\u6574Swap\u4ea4\u6362\u5206\u533a\u7684\u5927\u5c0f\uff1f<\/strong><\/p>\n
      \u5982\u679c\u4f60\u60f3\u8c03\u6574Centos7\u7cfb\u7edf\u4e2dSwap\u4ea4\u6362\u5206\u533a\u7684\u5927\u5c0f\uff0c\u4f60\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u8fdb\u884c\u64cd\u4f5c\uff1a<\/p>\n
        \n
      • \u9996\u5148\uff0c\u505c\u7528Swap\u4ea4\u6362\u5206\u533a\uff0c\u53ef\u4ee5\u4f7f\u7528\u547d\u4ee4 swapoff \/path\/to\/swapfile<\/code> \u6765\u505c\u7528Swap\u5206\u533a\u3002<\/li>\n
      • \u63a5\u4e0b\u6765\uff0c\u4f7f\u7528\u547d\u4ee4 dd if=\/dev\/zero of=\/path\/to\/swapfile bs=1G count=8<\/code> \u6765\u6269\u5c55Swap\u6587\u4ef6\u7684\u5927\u5c0f\u4e3a8GB\u3002\u4f60\u53ef\u4ee5\u6839\u636e\u9700\u8981\u4fee\u6539 count<\/code> \u7684\u503c\u6765\u8c03\u6574Swap\u5206\u533a\u7684\u5927\u5c0f\u3002<\/li>\n
      • \u7136\u540e\uff0c\u4f7f\u7528\u547d\u4ee4 chmod 600 \/path\/to\/swapfile<\/code> \u6765\u8bbe\u7f6eSwap\u6587\u4ef6\u7684\u6743\u9650\u3002<\/li>\n
      • \u63a5\u7740\uff0c\u4f7f\u7528\u547d\u4ee4 mkswap \/path\/to\/swapfile<\/code> \u6765\u8bbe\u7f6eSwap\u6587\u4ef6\u683c\u5f0f\u3002<\/li>\n
      • \u6700\u540e\uff0c\u4f7f\u7528\u547d\u4ee4 swapon \/path\/to\/swapfile<\/code> \u6765\u542f\u7528\u65b0\u8c03\u6574\u5927\u5c0f\u7684Swap\u4ea4\u6362\u5206\u533a\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"CentOS 7\u7cfb\u7edf\u4e2d\u6dfb\u52a0\u4e0e\u5220\u9664Swap\u4ea4\u6362\u5206\u533a\u7684\u4e3b\u8981\u6b65\u9aa4\u5305\u62ec\uff1a\u589e\u52a0Swap\u6587\u4ef6\u3001\u683c\u5f0f\u5316Swap\u6587\u4ef6\u3001\u542f\u7528Sw […]","protected":false},"author":3,"featured_media":312755,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/312726"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=312726"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/312726\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/312755"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=312726"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=312726"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=312726"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}