{"id":1746,"date":"2021-02-15T06:32:31","date_gmt":"2021-02-14T22:32:31","guid":{"rendered":"http:\/\/blog.zengqq.com.cn\/?p=1746"},"modified":"2021-02-15T12:48:55","modified_gmt":"2021-02-15T04:48:55","slug":"centos-7%e5%ae%98%e6%96%b9%e6%8c%87%e5%af%bc%ef%bc%9a%e7%b3%bb%e7%bb%9f%e5%a2%9e%e5%8a%a0swap","status":"publish","type":"post","link":"https:\/\/blog.zengqq.com.cn\/?p=1746","title":{"rendered":"CentOS 7\u5b98\u65b9\u6307\u5bfc\uff1a\u7cfb\u7edf\u589e\u52a0swap"},"content":{"rendered":"\n<p>2020\u5e7410\u670830\u65e5&nbsp;\u7531&nbsp;<a href=\"https:\/\/vpsgongyi.com\/p\/author\/admin\/\">admin<\/a><\/p>\n\n\n\n<p>swap\u662f\u4f4d\u4e8e\u78c1\u76d8\u4e0a\u7684\u7279\u6b8a\u6587\u4ef6\uff08\u6216\u5206\u533a\uff09\uff0c\u5c5e\u4e8e\u201c\u865a\u62df\u5185\u5b58\u201d\u7684\u4e00\u90e8\u5206\u3002\u901a\u4fd7\u70b9\u5c31\u662f\u5185\u5b58\u7684\u5907\u80ce\uff0c\u5185\u5b58\u5145\u8db3\u7684\u60c5\u51b5\u4e0b\uff0c\u57fa\u672c\u4e0a\u6ca1swap\u4ec0\u4e48\u4e8b\uff08\u548c\u8bbe\u7f6e\u6709\u5173\uff09\uff1b\u5185\u5b58\u4e0d\u591f\u7528\u65f6\u7cfb\u7edf\u4fbf\u5c06\u5185\u5b58\u4e2d\u7684\u90e8\u5206\u6570\u636e\u817e\u632a\u5230swap\u4e2d\uff0c\u4e3a\u6b63\u5728\u8fd0\u884c\u7684\u7a0b\u5e8f\u817e\u51fa\u5185\u5b58\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"#swap1\">Swap\u7684\u5fc5\u8981\u6027<\/a><\/li><li><a href=\"#swap2\">\u65b0\u7684SSD\u80fd\u80dc\u4efbSwap<\/a><\/li><li><a href=\"#swap3\">Swap\u6240\u9700\u5927\u5c0f<\/a><\/li><li><a href=\"#swap4\">\u600e\u4e48\u589e\u52a0\/\u5378\u8f7dSwap<\/a><ul><li><a href=\"#swap1_1\">\u67e5\u770bswap\u5927\u5c0f<\/a><\/li><li><a href=\"#swap1_2\">\u589e\u52a0\u548c\u5220\u9664swap<\/a><\/li><\/ul><\/li><li><a href=\"#swap5\">Swap\u76f8\u5173\u914d\u7f6e<\/a><\/li><\/ul>\n\n\n\n<p>\u4f7f\u7528swap\u80fd\u8ba9\u7cfb\u7edf\u8fd0\u884c\u66f4\u591a\u6216\u66f4\u5927\u578b\u7684\u7a0b\u5e8f\uff0c\u4f46\u7531\u4e8eswap\u7684\u8bfb\u5199\u901f\u5ea6\u8fdc\u900a\u4e8e\u5185\u5b58\uff0c\u9891\u7e41\u4f7f\u7528swap\u53ef\u80fd\u8ba9\u7cfb\u7edf\u548c\u7a0b\u5e8f\u6709\u5ef6\u8fdf\u5361\u987f\u3002<\/p>\n\n\n\n<p>\u672c\u6587\u4ecb\u7ecd<a href=\"https:\/\/tlanyan.me\/tag\/centos\/\" rel=\"noreferrer noopener\" target=\"_blank\">CentOS<\/a>&nbsp;7\u7cfb\u7edf\u589e\u52a0swap\u7684\u64cd\u4f5c\u6b65\u9aa4\uff0c\u8be5\u65b9\u6cd5\u540c\u6837\u9002\u7528\u4e8eCentOS 8\u7cfb\u7edf\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"swap1\">\u5927\u5185\u5b58\u8ba1\u7b97\u673aswap\u6709\u5fc5\u8981\u5417\uff1f<\/h2>\n\n\n\n<p>\u5bf9\u4e8e\u5185\u5b58\u8f83\u5c0f\u7684\u8ba1\u7b97\u673a\uff0cswap\u662f\u975e\u5e38\u6709\u5fc5\u8981\u7684\u3002swap\u7684\u5b58\u5728\u80fd\u8ba9\u6267\u884c\u5403\u5185\u5b58\u7a0b\u5e8f\u53d8\u5f97\u53ef\u80fd\uff0c\u6267\u884c\u6162\u603b\u6bd4\u4e0d\u80fd\u8fd0\u884c\u6216\u8005\u5954\u6e83\u5f3a\u3002\u4f46\u73b0\u4ee3\u8ba1\u7b97\u673a\u52a8\u8f848G\u4ee5\u4e0a\u7684\u5185\u5b58\uff0c\u5982\u975e\u8fd0\u884c\u5927\u578b\u6216\u4e13\u4e1a\u8f6f\u4ef6\uff0c\u5185\u5b58\u8db3\u591f\u65e5\u5e38\u4f7f\u7528\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cswap\u6709\u5b58\u5728\u7684\u5fc5\u8981\u5417\uff1f<\/p>\n\n\n\n<p>\u7b54\u6848\u8fd8\u662f\u770b\u4f7f\u7528\u573a\u666f\u3002\u4e2a\u4eba\u7535\u8111\u4e0a\u8fd0\u884c\u684c\u9762\u7248Linux\u5e76\u4e14\u5f00\u542f\u4f11\u7720\u529f\u80fd\uff0c\u5219\u5e94\u8be5<strong>\u5212\u5206\u4e0d\u5c0f\u4e8e\u5185\u5b58\u7684swap\u5206\u533a<\/strong>\uff1b\u5982\u679c\u662f\u5185\u5b58\u8db3\u591f\u5927\u4e14\u5e38\u5e74\u4e0d\u5173\u673a\u7684\u670d\u52a1\u5668\uff0c\u6ca1\u6709swap\u4e5f\u6beb\u65e0\u95ee\u9898\u3002<\/p>\n\n\n\n<h2 class=\"swap2 wp-block-heading\" id=\"swap2\">ssd\u786c\u76d8\u8981\u4e0d\u8981\u8bbe\u7f6eswap\uff1f<\/h2>\n\n\n\n<p>\u4e4b\u524d\u7684ssd\u786c\u76d8\u6709\u8bfb\u5199\u5bff\u547d\u7684\u95ee\u9898\uff0c\u56e0\u6b64\u4e0d\u5efa\u8bae\u5c06swap\u6587\u4ef6\u6216\u5206\u533a\u653e\u5230ssd\u786c\u76d8\u4e0a\u3002<\/p>\n\n\n\n<p>\u76ee\u524d\u7684ssd\u786c\u76d8\u6280\u672f\u5df2\u7ecf\u5347\u7ea7\u6362\u4ee3\u66f4\u667a\u80fd\uff0c\u5982\u679c\u6709swap\u9700\u6c42\uff0c\u653e\u5728ssd\u786c\u76d8\u4e0a\u4e5f\u6ca1\u4ec0\u4e48\u95ee\u9898\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"swap3\">swap\u8bbe\u7f6e\u591a\u5927\u597d\uff1f<\/h2>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<ol class=\"wp-block-list\"><li>\u5982\u679c\u5f00\u542f\u4f11\u7720\u529f\u80fd\uff0c<ol><li>\u5e94\u8be5\u5212\u5206swap\u5206\u533a\uff0c\u5e76\u4e14<\/li><li>\u5206\u533a\u5927\u5c0f\u4e0d\u80fd\u5c0f\u4e8e\u5185\u5b58\uff0c\u5efa\u8bae\u7684\u503c\u662f\u201c\u5185\u5b58\u5927\u5c0f+2G\u201d\u3002<\/li><\/ol><\/li><li>\u4e0d\u7528\u4f11\u7720\u529f\u80fd\u7684\u670d\u52a1\u5668\uff0c<ol><li><strong>swap\u53ef\u4ee5\u4e3a\u6587\u4ef6<\/strong>\uff0c\u4e00\u79cd\u786e\u5b9aswap\u5927\u5c0f\u7684\u5b9e\u7528\u65b9\u6cd5\u662f\uff1a<ul><li><span style=\"color:#d60c02\" class=\"has-inline-color\">1G\u5185\u5b58\u53ca\u4ee5\u4e0b\uff0cswap\u5927\u5c0f\u4e3a\u5185\u5b58\u7684\u4e24\u500d<\/span>\uff1b(512M,swap=1024M)<\/li><li>2-4G\u5185\u5b58\uff0c\u4e0e\u5185\u5b58\u540c\u7b49\u5927\u5c0f\uff1b<\/li><li>5-16G\u5185\u5b58\uff0cswap\u53ef\u56fa\u5b9a\u4e3a4G\uff1b<\/li><li>17-32G\u5185\u5b58\uff0c8G swap\uff1b<\/li><li>33 G\u53ca\u4ee5\u4e0a\uff0c\u56fa\u5b9a\u4e3a16G swap\u3002<\/li><\/ul><\/li><\/ol><\/li><\/ol>\n<\/div><\/div>\n\n\n\n<p>\u4e0a\u8ff0\u65b9\u6cd5\u4e0d\u7edd\u5bf9\uff0c\u6709\u7279\u6b8a\u9700\u6c42\u53ef\u914c\u60c5\u589e\u51cfswap\u5927\u5c0f\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"swap4\">\u600e\u6837\u589e\u52a0swap\uff1f<\/h2>\n\n\n\n<p>\u5b89\u88c5\u64cd\u4f5c\u7cfb\u7edf\u65f6\u5019\u53ef\u4ee5\u5206\u533a\uff08\u5355\u72ec\u6302\u8f7d\u70b9\uff09\u5f62\u5f0f\u6307\u5b9aswap\uff0c\u4e5f\u53ef\u4ee5\u5728\u7cfb\u7edf\u5b89\u88c5\u5b8c\u6210\u540e\u52a8\u6001\u6dfb\u52a0\u548c\u5220\u9664\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"swap1_1\">\u67e5\u770bswap<\/h3>\n\n\n\n<p><code>free<\/code>\u547d\u4ee4\u53ef\u4ee5\u67e5\u770b\u7cfb\u7edf<strong>\u6d3b\u52a8\u7684swap<\/strong>\u4fe1\u606f\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$ free -m\n# \u8f93\u51fa\u5982\u4e0b\n#               total        used        free      shared  buff\/cache   available\n# Mem:           7976        4979         328         124        2669        2703\n# Swap:             0           0           0\n<\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"734\" height=\"101\" src=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534810.41.38-1.png\" alt=\"\" class=\"wp-image-1775\" srcset=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534810.41.38-1.png 734w, https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534810.41.38-1-480x66.png 480w\" sizes=\"auto, (max-width: 734px) 100vw, 734px\" \/><\/figure>\n\n\n\n<p>\u7b2c\u4e8c\u884c\u662fswap\u4fe1\u606f\uff0c\u53ef\u4ee5\u770b\u5230\u6ca1\u6709\u6d3b\u52a8\u7684swap\u3002<\/p>\n\n\n\n<p>\u4e5f\u53ef\u4ee5\u7528<code>swapon<\/code>\u547d\u4ee4\u67e5\u770b\u6d3b\u52a8\u7684swap\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$ swapon -s\n# \u6ca1\u6709swap\u4fe1\u606f\uff0c\u6240\u4ee5\u65e0\u8f93\u51fa\n# \u6709swap\u7684\u8f93\u51fa\u4e3a\n# Filename              Type        Size    Used    Priority\n# \/swap                                     file    2097148 281052  -2\n<\/pre>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534810.57.50.png\" alt=\"\" class=\"wp-image-1777\" width=\"626\" height=\"123\" srcset=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534810.57.50.png 720w, https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534810.57.50-480x94.png 480w\" sizes=\"auto, (max-width: 626px) 100vw, 626px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534810.58.40.png\" alt=\"\" class=\"wp-image-1778\" width=\"626\" height=\"114\" srcset=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534810.58.40.png 734w, https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534810.58.40-480x88.png 480w\" sizes=\"auto, (max-width: 626px) 100vw, 626px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"swap1_2\">\u589e\u52a0swap<\/h3>\n\n\n\n<p>\u5047\u8bbe\u6211\u4eec\u6253\u7b97\u8fd0\u884c\u4e00\u4e2a\u975e\u5e38\u5360\u7528\u5185\u5b58\u7684\u7a0b\u5e8f\uff0c8G\u7269\u7406\u5185\u5b58\u4e0d\u591f\uff0c\u4fbf\u53ef\u501f\u52a9swap\u589e\u52a0\u7cfb\u7edf\u53ef\u7528\u7684<strong>\u865a\u62df\u5185\u5b58<\/strong>\u3002\u64cd\u4f5c\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-columns are-vertically-aligned-top is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<ul class=\"wp-block-list\"><li>\u9009\u5b9a\u6216\u521b\u5efa\u4e00\u4e2a\u4f5c\u4e3aswap\u7684\u6587\u4ef6\uff08\u4e5f\u53ef\u4ee5\u7528\u5206\u533a\uff09\uff0c\u5e38\u7528\u521b\u5efa\u6307\u5b9a\u5927\u5c0f\u6587\u4ef6\u7684\u547d\u4ee4\u6709<code>fallocate<\/code>\u548c<code>dd<\/code>\u3002\u4f8b\u5982\u521b\u5efa\u4e00\u4e2a8G\u5927\u5c0f\u7684\u6587\u4ef6(<span style=\"color:#c41e04\" class=\"has-inline-color\">1G\uff0c\u4e5f\u5c31\u662f1024M\u662f\u6211\u7684\u914d\u7f6e<\/span>\uff09\uff1a<\/li><\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># fallocate\u521b\u5efa \nsudo fallocate -l 1024M \/swap \n# dd\u521b\u5efa \nsudo dd bs=1M count=1024 if=\/dev\/zero of=\/swap <\/pre>\n\n\n\n<p>\u7531\u4e8e<code>dd<\/code>\u6709\u590d\u5236\u7684\u8fc7\u7a0b\u6267\u884c\u8f83\u6162\uff0c\u5b9e\u8df5\u4e2d\u5efa\u8bae\u7528<code>fallocate<\/code><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"36\" class=\"wp-image-1780\" style=\"width: 640px;\" src=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534811.07.48.png\" alt=\"\" srcset=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534811.07.48.png 732w, https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534811.07.48-480x27.png 480w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/>\uff1b<\/p>\n<\/div>\n<\/div>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>swap\u6587\u4ef6\u4f1a\u5b58\u653e\u5185\u5b58\u4e2d\u7684\u6570\u636e\uff0c\u51fa\u4e8e\u5b89\u5168\u8003\u8651\u5e94\u9650\u5236\u5176\u5b83\u7528\u6237\u7684\u8bbf\u95ee\uff1a<code>sudo chmod 0600 \/swap<\/code>;<\/li><li>\u5c06\u6587\u4ef6\u683c\u5f0f\u5316\u4e3aswap\u6587\u4ef6\uff1a<code>sudo mkswap \/swap<\/code><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"86\" class=\"wp-image-1779\" style=\"width: 640px;\" src=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534811.05.39.png\" alt=\"\" srcset=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534811.05.39.png 592w, https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534811.05.39-480x65.png 480w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/>\uff1b<\/li><li>\u542f\u7528\u8be5swap\u6587\u4ef6\uff1a<ol><li><strong>\u542f\u7528<\/strong><code>sudo swapon \/swap<\/code>\uff1b<\/li><li><strong>\u5378\u8f7d<\/strong> \u5982\u679c\u4e0d\u60f3\u4f7f\u7528swap\uff0c\u53ef\u7528<code>swapoff<\/code>\u547d\u4ee4\u5378\u8f7d\uff1a<code>sudo swapoff \/swap<\/code>\uff1b<\/li><\/ol><\/li><li>\u5982\u679c\u5e0c\u671b\u7cfb\u7edf\u542f\u52a8\u540e\u81ea\u52a8\u52a0\u8f7dswap\u6587\u4ef6\uff0c\u5728<strong>\/etc\/fstab<\/strong>\u6587\u4ef6\u589e\u52a0\u4e00\u884c\uff1a<ul><li>\/etc\/fstab                                               <img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"43\" class=\"wp-image-1782\" style=\"width: 640px;\" src=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534811.10.31.png\" alt=\"\" srcset=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534811.10.31.png 622w, https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534811.10.31-480x32.png 480w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/li><li><code>\/swap swap swap sw 0 0<\/code><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"148\" class=\"wp-image-1783\" style=\"width: 640px;\" src=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534811.16.30.png\" alt=\"\" srcset=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534811.16.30.png 845w, https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534811.16.30-480x111.png 480w, https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534811.16.30-768x178.png 768w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/li><\/ul><\/li><\/ul>\n\n\n\n<p>\u589e\u52a0swap\u540e\uff0c\u53ef\u7528<code>swapon -s<\/code>\u6216<code>free -m<\/code>\u547d\u4ee4\u67e5\u770bswap\u4fe1\u606f<img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"88\" class=\"wp-image-1784\" style=\"width: 640px;\" src=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534811.20.10.png\" alt=\"\" srcset=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534811.20.10.png 720w, https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534811.20.10-480x66.png 480w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"swap5\">swap\u76f8\u5173\u8bbe\u7f6e<\/h2>\n\n\n\n<p>\u548cswap\u6700\u76f4\u63a5\u76f8\u5173\uff0c\u4e5f\u662f\u5f71\u54cd\u7cfb\u7edf\u6027\u80fd\u7684\u4e00\u4e2a\u8bbe\u7f6e\u53c2\u6570\u4fbf\u662f<strong>vm.swappiness<\/strong>\u3002\u5176\u503c\u662f0-100\u7684\u6574\u6570\uff0c\u6307\u793a\u5185\u5b58\u7528\u6389<strong>\u767e\u5206\u4e4b\u591a\u5c11<\/strong>\u65f6\u5f00\u59cb\u4f7f\u7528swap\u3002100\u8868\u793a\u5c3d\u53ef\u80fd\u4f7f\u7528swap\uff0c0\u5219\u8868\u793a\u53ea\u6709\u7269\u7406\u5185\u5b58\u4e0d\u591f\u65f6\u624d\u7528\u4e0aswap\u5907\u80ce\u3002\u5bf9\u4e8e\u670d\u52a1\u5668\uff0c\u5efa\u8bae10-30\u4e4b\u95f4\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u8bbe\u7f6e\u548c\u66f4\u6539<strong>swappiness<\/strong>\u7684\u547d\u4ee4\u662f\uff1a<code>sudo sysctl vm.swappiness=10<\/code><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"68\" class=\"wp-image-1789\" style=\"width: 640px;\" src=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0b\u534812.14.19.png\" alt=\"\" srcset=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0b\u534812.14.19.png 725w, https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0b\u534812.14.19-480x51.png 480w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/li><li>\u8be5\u547d\u4ee4\u53ea\u5bf9\u5f53\u524d\u7cfb\u7edf\u6709\u6548\uff0c\u7cfb\u7edf\u91cd\u542f\u540e\u53c8\u6062\u590d\u9ed8\u8ba4\u503c\u3002<\/li><li><strong>\u67e5\u770b<\/strong>\u3002\u5229\u7528<strong>cat \/proc\/sys\/vm\/swappiness<\/strong>\u6765\u67e5\u770b\u5f53\u524d\u7684%\uff0c\u6211\u7684aliyu\u9ed8\u8ba4\u7ed9\u7684\u662f0<img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"137\" class=\"wp-image-1785\" style=\"width: 640px;\" src=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534811.29.08.png\" alt=\"\" srcset=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534811.29.08.png 638w, https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0a\u534811.29.08-480x103.png 480w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/li><li>\u5982\u4f55\u53d6\u5f97\u4e00\u4e2a\u6700\u4f18\u5316\u7684swappiness\uff1f\u66f4\u52a0\u8be6\u7ec6\u7684\u8bf7\u770b<a rel=\"noreferrer noopener\" href=\"https:\/\/www.cnblogs.com\/yinzhengjie\/p\/9994207.html\" target=\"_blank\">\u8fd9\u8fb9<\/a> <span class=\"has-inline-color has-accent-color\">\u300aLinux\u865a\u62df\u5185\u5b58(swap)\u8c03\u4f18\u7bc7-\u201cswappiness\u201d,\u201cvm.dirty_background_ratio\u201d\u548c\u201cvm.dirty_ratio\u201d\u300b<\/span><ul><li>\u5047\u8bbewappiness\u53c2\u6570\u7684\u9ed8\u8ba4\u8bbe\u7f6e\u4e3a10<\/li><li>\u670d\u52a1\u5668\u5185\u5b58\u5728\u4f7f\u7528\u5230100-10=90%\u7684\u65f6\u5019\uff0c\u5c31\u5f00\u59cb\u51fa\u73b0\u6709\u4ea4\u6362\u5206\u533a\u7684\u4f7f\u7528<\/li><li>\u6309\u7167\u670d\u52a1\u5668\u5185\u5b58\u4e3a512M\uff0c\u90a3\u4e4890%\u7684\u91cf\u5c31\u662f461M\uff0c<\/li><li>Vol=461M\u662f\u6781\u9650\u60c5\u51b5\u4e0b\u9700\u8981\u6309\u7167\u786c\u76d8\u8bfb\u5199\u901f\u5ea6\u6765\u6682\u5b58\u548c\u4ea4\u6362page\u6700\u5927\u7a7a\u95f4\uff0c<\/li><li>SSD\u7684W\/R\u901f\u5ea6\u662fB=500M\/s\u90a3\u4e48\u5c31\u9700\u8981461&#215;2\/500,\u5927\u69821.85\u79d2\u624d\u80fd\u5b8c\u6210\u6362\u51fa\u6362\u8fdb\u6574\u4e2aPage\uff0c\u597d\u5728\u5927\u90e8\u5206\u65f6\u95f4\u53ea\u9700\u898120~30M\u7684\u5355\u5411\u8c03\u7528\uff0c\u5386\u65f650ms\uff0c \u6162\u4e5f\u5c31\u662f1\/20\u79d2\u3002<\/li><li>\u5982\u679c\u8981\u628a\u8fd9\u4e2a\u65f6\u95f4\u7f29\u77ed\u52301\/10\u52300.185\u79d2\uff0c\u5373185ms<ul><li>\u8ba9SSD\u8bfb\u53d6\u5347\u7ea7\u52305G\/s(USB3.1 Gen2,\u6216\u8005\u96f7\u75353)<\/li><li>\u6bcf\u6b21\u8c03\u7528\u5168\u90e8Page\u7684\u5c0f\u4e8e46M(\u5c0f\u5185\u5b58\u768432\u4f4d\u7cfb\u7edf\u5f88\u5bb9\u6613\u6ee1\u8db3\u8fd9\u4e2a\u8981\u6c42\uff09<\/li><li>\u628awappiness\u9ed8\u8ba4\u8bbe\u7f6e\u8c03\u4f4e\uff0c\u4ece10%\u51cf\u52301%\uff0c\u7269\u7406\u5185\u5b58\u8fd8\u662f512M\uff0c\u6bcf\u6b21\u523099%\u65f6\uff0c\u624d\u4f1a\u8c03\u914dswap\u5206\u533a\uff0c\u4ece\u7edf\u8ba1\u5b66\u89d2\u5ea6\u6700\u5927\u53ef\u80fd\u4f7f\u7528\u7269\u7406\u5185\u5b58\u7684\u540c\u65f6\u53c8\u4fdd\u8bc1\u4f4e\u9891\u4f7f\u7528\u7684page\u80fd\u4e0d\u5360\u7528\u4f18\u8d28\u4f20\u8f93\u901a\u9053<\/li><\/ul><\/li><li><span style=\"color:#c92c09\" class=\"has-inline-color\">\u5982\u679c\u8981\u628a\u65f6\u95f4\u7f29\u77ed\u52301\/20\u523075ms\uff0c\u90a3\u5c31\u628awappiness\u8bbe\u4e3a10%<\/span><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"68\" class=\"wp-image-1789\" style=\"width: 640px;\" src=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0b\u534812.14.19.png\" alt=\"\" srcset=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0b\u534812.14.19.png 725w, https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0b\u534812.14.19-480x51.png 480w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><ul><li>90%\u7684\u4ea4\u6362\u53d1\u751f\u5728\u7269\u7406\u5185\u5b58\u4e2d\uff0c\u603b\u5185\u5b58487M\uff0c<\/li><li>\u5f53\u6240\u9700\u5185\u5b58\u9700\u898190%\u7684\u5185\u5b58\u65f6\uff0cswap\u5c06\u4f1a\u8a8a\u5199\u8f6c\u5b58\u4f4e\u9891\u4f7f\u7528\u7684page\u5230SSD<\/li><\/ul><\/li><li>\u6211\u7684\u914d\u7f6e=10%\uff0c\u5b9e\u9645\u4e0a\uff0c\u4ece\u4e0a\u9762\u7684\u622a\u56fe\u5c31\u77e5\u9053\uff1a<ul><li>\u6211\u7684\u7269\u7406\u5185\u5b58\u603b\u5171\u53ea\u6709487M\uff0c\u65e0\u8bbf\u95ee\u65f6\u5360\u7528\u662f301M(\u8fd9\u5df2\u7ecf\u5360\u4e8662%\uff09<\/li><li>\u8fd9301M\u90fd\u662f\u4eab\u7528VIP\u7684\u9ad8\u901f\u5185\u5b58\u541e\u5410\u901f\u5ea6\uff0c\u5237\u65b0\u4e00\u6b21\u5360\u7528\u5c31\u4ece301\u5347\u5230325M\u751a\u81f3331\uff0c\u5176\u4e2d24~30M\u5c31\u662f\u4e00\u6b21\u7a81\u53d1\u541e\u5410\uff0c\u5927\u6982\u5c31\u662f6%<\/li><li>\u5341\u4e2a\u7a81\u53d1\u541e\u5410\u5c31\u662f\u5927\u698260%\uff0c122%\u7684\u9700\u6c42\uff0c\u670922% \u7684\u5197\u4f59\u9700\u8981\u7f6e\u6362<\/li><li>\u6682\u65f6\u653e10%\u6765\u89c2\u5bdf\u7cfb\u7edf\u7684\u7a33\u5b9a\u5ea6\uff0c\u4ee5\u540e\u518d\u6839\u636elog\u6765\u5fae\u8c03<img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"531\" class=\"wp-image-1793\" style=\"width: 640px;\" src=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0b\u534812.20.41.png\" alt=\"\" srcset=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0b\u534812.20.41.png 733w, https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0b\u534812.20.41-480x398.png 480w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/li><\/ul><\/li><\/ul><\/li><li>\u8981\u60f3\u8bbe\u7f6e\u6c38\u4e45\u751f\u6548\uff0c\u5728\/etc\/sysctl.conf\u4e2d\u589e\u52a0\u6216\u66f4\u6539\u5bf9\u5e94\u7684\u8bbe\u7f6e\u884c\uff1a<code>vm.swappiness = 10<\/code><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"120\" class=\"wp-image-1800\" style=\"width: 640px;\" src=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0b\u534812.45.14.png\" alt=\"\" srcset=\"https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0b\u534812.45.14.png 621w, https:\/\/blog.zengqq.com.cn\/wp-content\/uploads\/2021\/02\/\u5c4f\u5e55\u5feb\u7167-2021-02-15-\u4e0b\u534812.45.14-480x90.png 480w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/li><\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>\u53c2\u8003<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li><a href=\"https:\/\/www.digitalocean.com\/community\/tutorials\/how-to-add-swap-on-centos-7\" rel=\"noreferrer noopener\" target=\"_blank\">https:\/\/www.digitalocean.com\/community\/tutorials\/how-to-add-swap-on-centos-7<\/a><\/li><li><a href=\"https:\/\/vpsgongyi.com\/p\/2834\/\" rel=\"noreferrer noopener\" target=\"_blank\">Linux\u67e5\u770b\u786c\u76d8\u4fe1\u606f\u65b9\u6cd5\u603b\u7ed3<\/a><\/li><\/ol>\n","protected":false},"excerpt":{"rendered":"<p>2020\u5e7410\u670830\u65e5&nbsp;\u7531&nbsp;a [&#8230;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[253,249],"tags":[318,314,315],"class_list":["post-1746","post","type-post","status-publish","format-standard","hentry","category-fun","category-technology","tag-add-swap","tag-centos","tag-swap"],"_links":{"self":[{"href":"https:\/\/blog.zengqq.com.cn\/index.php?rest_route=\/wp\/v2\/posts\/1746","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.zengqq.com.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.zengqq.com.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.zengqq.com.cn\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.zengqq.com.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1746"}],"version-history":[{"count":28,"href":"https:\/\/blog.zengqq.com.cn\/index.php?rest_route=\/wp\/v2\/posts\/1746\/revisions"}],"predecessor-version":[{"id":1802,"href":"https:\/\/blog.zengqq.com.cn\/index.php?rest_route=\/wp\/v2\/posts\/1746\/revisions\/1802"}],"wp:attachment":[{"href":"https:\/\/blog.zengqq.com.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1746"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.zengqq.com.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1746"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.zengqq.com.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1746"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}