{"id":575,"date":"2016-04-08T14:18:35","date_gmt":"2016-04-08T06:18:35","guid":{"rendered":"http:\/\/cn.hostease.com\/xueyuan\/?p=575"},"modified":"2016-04-08T14:18:35","modified_gmt":"2016-04-08T06:18:35","slug":"%e5%85%b3%e4%ba%8elinux%e7%b3%bb%e7%bb%9f%e5%ae%89%e8%a3%85%e4%b8%adswap%e5%88%86%e5%8c%ba%e7%9a%84%e8%a7%a3%e9%87%8a","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/xueyuan\/uncategorized\/%e5%85%b3%e4%ba%8elinux%e7%b3%bb%e7%bb%9f%e5%ae%89%e8%a3%85%e4%b8%adswap%e5%88%86%e5%8c%ba%e7%9a%84%e8%a7%a3%e9%87%8a\/","title":{"rendered":"\u5173\u4e8eLinux\u7cfb\u7edf\u5b89\u88c5\u4e2dSwap\u5206\u533a\u7684\u89e3\u91ca"},"content":{"rendered":"

Swap\u5206\u533a\uff0c\u5373\u4ea4\u6362\u533a\uff0cSwap\u7a7a\u95f4\u7684\u4f5c\u7528\u53ef\u7b80\u5355\u63cf\u8ff0\u4e3a\uff1a\u5f53\u7cfb\u7edf\u7684\u7269\u7406\u5185\u5b58\u4e0d\u591f\u7528\u7684\u65f6\u5019\uff0c\u5c31\u9700\u8981\u5c06\u7269\u7406\u5185\u5b58\u4e2d\u7684\u4e00\u90e8\u5206\u7a7a\u95f4\u91ca\u653e\u51fa\u6765\uff0c\u4ee5\u4f9b\u5f53\u524d\u8fd0\u884c \u7684\u7a0b\u5e8f\u4f7f\u7528\u3002\u90a3\u4e9b\u88ab\u91ca\u653e\u7684\u7a7a\u95f4\u53ef\u80fd\u6765\u81ea\u4e00\u4e9b\u5f88\u957f\u65f6\u95f4\u6ca1\u6709\u4ec0\u4e48\u64cd\u4f5c\u7684\u7a0b\u5e8f\uff0c\u8fd9\u4e9b\u88ab\u91ca\u653e\u7684\u7a7a\u95f4\u88ab\u4e34\u65f6\u4fdd\u5b58\u5230Swap\u7a7a\u95f4\u4e2d\uff0c\u7b49\u5230\u90a3\u4e9b\u7a0b\u5e8f\u8981\u8fd0\u884c\u65f6\uff0c\u518d\u4ece Swap\u4e2d\u6062\u590d\u4fdd\u5b58\u7684\u6570\u636e\u5230\u5185\u5b58\u4e2d\u3002\u8fd9\u6837\uff0c\u7cfb\u7edf\u603b\u662f\u5728\u7269\u7406\u5185\u5b58\u4e0d\u591f\u65f6\uff0c\u624d\u8fdb\u884cSwap\u4ea4\u6362\u3002\u5176\u5b9e\uff0cSwap\u7684\u8c03\u6574\u5bf9Linux\u670d\u52a1\u5668\uff0c\u7279\u522b\u662fWeb\u670d\u52a1\u5668 \u7684\u6027\u80fd\u81f3\u5173\u91cd\u8981\u3002\u901a\u8fc7\u8c03\u6574Swap\uff0c\u6709\u65f6\u53ef\u4ee5\u8d8a\u8fc7\u7cfb\u7edf\u6027\u80fd\u74f6\u9888\uff0c\u8282\u7701\u7cfb\u7edf\u5347\u7ea7\u8d39\u7528\u3002<\/p>\n

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\u7a81\u7834128M Swap\u9650\u5236<\/strong><\/p>\n

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Swap\u914d\u7f6e\u5bf9\u6027\u80fd\u7684\u5f71\u54cd<\/strong><\/p>\n

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\u53e6\u5916\uff0cSwap\u5206\u533a\u7684\u6570\u91cf\u5bf9\u6027\u80fd\u4e5f\u6709\u5f88\u5927\u7684\u5f71\u54cd\u3002\u56e0\u4e3aSwap\u4ea4\u6362\u7684\u64cd\u4f5c\u662f\u78c1\u76d8IO\u7684\u64cd\u4f5c\uff0c\u5982\u679c\u6709\u591a\u4e2aSwap\u4ea4\u6362\u533a\uff0cSwap\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\u5982\u679c\u53ea\u6709\u4e00\u4e2a\u4ea4\u6362\u533a\uff0c\u6240\u6709\u7684\u4ea4\u6362\u64cd\u4f5c\u4f1a\u4f7f\u4ea4\u6362\u533a\u53d8\u5f97\u5f88\u5fd9\uff0c\u4f7f\u7cfb\u7edf\u5927\u591a\u6570\u65f6\u95f4 \u5904\u4e8e\u7b49\u5f85\u72b6\u6001\uff0c\u6548\u7387\u5f88\u4f4e\u3002\u7528\u6027\u80fd\u76d1\u89c6\u5de5\u5177\u5c31\u4f1a\u53d1\u73b0\uff0c\u6b64\u65f6\u7684CPU\u5e76\u4e0d\u5f88\u5fd9\uff0c\u800c\u7cfb\u7edf\u5374\u6162\u3002\u8fd9\u8bf4\u660e\uff0c\u74f6\u9888\u5728IO\u4e0a\uff0c\u4f9d\u9760\u63d0\u9ad8CPU\u7684\u901f\u5ea6\u662f\u89e3\u51b3\u4e0d\u4e86\u95ee\u9898\u7684\u3002<\/p>\n

<\/a><\/p>\n

\u5efa\u7acb\u4e00\u4e2a\u6709\u8fde\u7eed\u7a7a\u95f4\u7684\u7a7a\u767d\u6587\u4ef6<\/h2>\n

\u670d\u52a1\u5668\u7684\u7269\u7406\u5185\u5b58\u662f512MB\uff0c\u6309\u71671.5~2\u500d\u539f\u5219\uff0c\u6211\u5c06swap\u6587\u4ef6\u8bbe\u7f6e\u4e3a1GB\u3002<\/p>\n

\n
    \n
  1. #root\u00a0@aliyun\u00a0:\/srv#\u00a0dd\u00a0if<\/span>=\/dev\/zero\u00a0of<\/span>=SWAPFILE<\/span>\u00a0bs<\/span>=1024<\/span>\u00a0count<\/span>=1048576<\/span>\u00a01048576+0\u00a0records\u00a0in\u00a01048576+0\u00a0records\u00a0out\u00a01073741824\u00a0bytes\u00a0(1.1\u00a0GB)\u00a0copied,\u00a059.7957\u00a0s,\u00a018.0\u00a0MB\/s<\/li>\n
  2. #root@aliyun\u00a0:\/srv#\u00a0dd\u00a0if<\/span>=\/dev\/zero\u00a0of<\/span>=SWAPFILE<\/span>\u00a0bs<\/span>=1024<\/span>\u00a0count<\/span>=1048576<\/span><\/li>\n
  3. 1048576+0\u00a0records\u00a0in<\/li>\n
  4. 1048576+0\u00a0records\u00a0out<\/li>\n
  5. 1073741824\u00a0bytes\u00a0(1.1\u00a0GB)\u00a0copied,\u00a059.7957\u00a0s,\u00a018.0\u00a0MB\/s<\/li>\n<\/ol>\n<\/div>\n

    <\/a><\/p>\n

    \u4f7f\u7528swap\u6587\u4ef6<\/h2>\n

    \u4f7f\u7528swapon\u547d\u4ee4\u8ba9\u7cfb\u7edf\u4f7f\u7528\u8fd9\u4e2a\u6587\u4ef6\u4f5c\u4e3aswap\u6587\u4ef6\u3002\u4f46\u662f\u8fd9\u4e2a\u6587\u4ef6\u4e0d\u80fd\u76f4\u63a5\u4f7f\u7528\uff0c\u5426\u5219\u4f1a\u62a5\u9519\uff1a<\/p>\n

    \n
      \n
    1. root\u00a0@aliyun\u00a0:\/srv#\u00a0swapon\u00a0swapfile\u00a0swapon:\u00a0\/srv\/swapfile:\u00a0read\u00a0swap\u00a0header\u00a0failed:\u00a0Invalid\u00a0argument<\/li>\n
    2. root@aliyun:\/srv#\u00a0swapon\u00a0swapfile<\/li>\n
    3. swapon:\u00a0\/srv\/swapfile:\u00a0read\u00a0swap\u00a0header\u00a0failed:\u00a0Invalid\u00a0argument<\/li>\n<\/ol>\n<\/div>\n

      \u5fc5\u987b\u5148\u4f7f\u7528mkswap\u5c06\u6587\u4ef6\u683c\u5f0f\u5316\u6210swap\u683c\u5f0f\uff08\u4e0d\u77e5\u9053\u4e3a\u4ec0\u4e48\u4f1a\u5c11\u4e864KB\uff09\uff1a<\/p>\n

      \n
        \n
      1. root\u00a0@aliyun\u00a0:\/srv#\u00a0mkswap\u00a0SWAPFILE\u00a01048576\u00a0Setting\u00a0up\u00a0swapspace\u00a0version\u00a01,\u00a0size<\/span>\u00a0=\u00a01048572<\/span>\u00a0KiB\u00a0no\u00a0label,\u00a0UUID<\/span>=1aaed031<\/span>-33ef-479b-a9a4-2f008a7bbb2f<\/li>\n
      2. root@aliyun:\/srv#\u00a0mkswap\u00a0SWAPFILE\u00a01048576<\/li>\n
      3. Setting\u00a0up\u00a0swapspace\u00a0version\u00a01,\u00a0size<\/span>\u00a0=\u00a01048572<\/span>\u00a0KiB<\/li>\n
      4. no\u00a0label,\u00a0UUID<\/span>=1aaed031<\/span>-33ef-479b-a9a4-2f008a7bbb2f<\/li>\n<\/ol>\n<\/div>\n

        \u4f7f\u7528\u683c\u5f0f\u5316\u5b8c\u6bd5\u7684\u6587\u4ef6\uff1a<\/p>\n

        \n
          \n
        1. root\u00a0@aliyun\u00a0:\/srv#\u00a0swapon\u00a0SWAPFILE<\/li>\n
        2. root@aliyun:\/srv#\u00a0swapon\u00a0SWAPFILE<\/li>\n<\/ol>\n<\/div>\n

          \u67e5\u770b\u6587\u4ef6\u4f7f\u7528\u60c5\u51b5\uff1a<\/p>\n

          \n
          \n
            \n
          1. root@aliyun:\/srv#\u00a0swapon\u00a0-s\u00a0Filename\u00a0Type\u00a0Size\u00a0Used\u00a0Priority\u00a0\/srv\/SWAPFILE\u00a0file\u00a01048572\u00a095852\u00a0-1<\/li>\n
          2. root@aliyun:\/srv#\u00a0swapon\u00a0-s<\/li>\n
          3. Filename\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Type\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Size\u00a0\u00a0\u00a0\u00a0Used\u00a0\u00a0\u00a0\u00a0Priority<\/li>\n
          4. \/srv\/SWAPFILE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0file\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01048572\u00a095852\u00a0\u00a0\u00a0-1<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

            <\/a><\/p>\n

            \u52a0\u5165\u81ea\u52a8\u542f\u7528<\/h2>\n

            \u4e3a\u907f\u514d\u91cd\u542f\u540eswapfile\u751f\u6548\uff0c\u53ef\u4ee5\u5c06\u542f\u7528swap\u7684\u4ee3\u7801\u52a0\u5165\u542f\u52a8\u6587\u4ef6\u4e2d\uff0c\u5bf9\u4e8eubuntu server\uff0c\u7f16\u8f91\/etc\/rc.local\u6587\u4ef6\uff0c\u52a0\u5165\u4ee5\u4e0b\u5185\u5bb9\uff08\u5177\u4f53\u6587\u4ef6\u8def\u5f84\u81ea\u5b9a\uff09\uff1a<\/p>\n

            \n
              \n
            1. swapon\u00a0\/srv\/SWAPFILE<\/li>\n
            2. swapon\u00a0\/srv\/SWAPFILE<\/li>\n<\/ol>\n<\/div>\n

              \u6216\u8005<\/strong><\/p>\n

              \u4fee\u6539\/etc\/fstab\u6587\u4ef6\uff0c\u52a0\u5165\u4ee5\u4e0b\u5185\u5bb9\uff1a<\/p>\n

                \n
              1. \/srv\/SWAPFILE\u00a0swap\u00a0swap\u00a0defaults\u00a00\u00a00<\/li>\n
              2. \/srv\/SWAPFILE\u00a0\u00a0\u00a0swap\u00a0\u00a0\u00a0\u00a0swap\u00a0\u00a0\u00a0\u00a0defaults\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00<\/li>\n<\/ol>\n

                \u539f\u6587\u94fe\u63a5\uff1ahttps:\/\/my.oschina.net\/renguijiayi\/blog\/299150<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

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