{"id":4897,"date":"2020-12-22T16:23:07","date_gmt":"2020-12-22T08:23:07","guid":{"rendered":"https:\/\/damogame.cn\/wordpress\/?p=4897"},"modified":"2020-12-22T16:23:07","modified_gmt":"2020-12-22T08:23:07","slug":"%e6%bc%ab%e7%94%bb-%e4%b8%80%e5%8f%b0linux%e6%9c%8d%e5%8a%a1%e5%99%a8%e6%9c%80%e5%a4%9a%e8%83%bd%e6%94%af%e6%92%91%e5%a4%9a%e5%b0%91%e4%b8%aatcp%e8%bf%9e%e6%8e%a5%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/4897","title":{"rendered":"\u6f2b\u753b | \u4e00\u53f0Linux\u670d\u52a1\u5668\u6700\u591a\u80fd\u652f\u6491\u591a\u5c11\u4e2aTCP\u8fde\u63a5\uff1f"},"content":{"rendered":"

\u539f\u6587\u5730\u5740<\/a><\/p>\n

 <\/p>\n

<\/a>\u4ee3\u7801\u4e0e\u8fdc\u65b9<\/span>\u00a0\u4eca\u5929<\/em><\/div>\n
<\/div>\n
\n

\u4ee5\u4e0b\u6587\u7ae0\u6765\u6e90\u4e8e\u5f00\u53d1\u5185\u529f\u4fee\u70bc\u00a0\uff0c\u4f5c\u8005\u5f20\u5f66\u98deallen<\/p>\n

\"\u5f00\u53d1\u5185\u529f\u4fee\u70bc\"<\/span><\/div>\n
\u5f00\u53d1\u5185\u529f\u4fee\u70bc<\/strong><\/p>\n

\u4f5c\u8005\u6709\u4e92\u8054\u7f51\u5927\u53829\u5e74\u591a\u7684\u540e\u7aef\u5f00\u53d1\u5de5\u4f5c\u7ecf\u9a8c\u3002\u5728\u672c\u516c\u4f17\u53f7\u4e2d\uff0c\u9010\u6b65\u628a\u8fd9\u4e9b\u5e74\u5de5\u4f5c\u4e2d\u5bf9\u4e8e\u5e95\u5c42\u7684\u4e00\u4e9b\u601d\u8003\u603b\u7ed3\u51fa\u6765\u5206\u4eab\u7ed9\u5927\u5bb6\uff0c\u5e0c\u671b\u6211\u4eec\u6bcf\u4e00\u4f4d\u5f00\u53d1\u540c\u5b66\u90fd\u80fd\u591f\u505a\u5230\uff1a\u4e86\u89e3\u6bcf\u4e00\u6bd4\u7279\uff0c\u7528\u597d\u6bcf\u4e00\u7eb3\u79d2\u3002<\/p>\n<\/div>\n

<\/div>\n<\/div>\n
\n
\n

\u56f0\u60d1\u5f88\u591a\u4eba\u7684\u5e76\u53d1\u95ee\u9898<\/h2>\n

\u5728\u7f51\u7edc\u5f00\u53d1\u4e2d\uff0c\u6211\u53d1\u73b0\u6709\u5f88\u591a\u540c\u5b66\u5bf9\u4e00\u4e2a\u57fa\u7840\u95ee\u9898\u59cb\u7ec8\u662f\u6ca1\u6709\u5f7b\u5e95\u641e\u660e\u767d\u3002\u90a3\u5c31\u662f\u4e00\u53f0\u670d\u52a1\u5668\u6700\u5927\u7a76\u7adf\u80fd\u652f\u6301\u591a\u5c11\u4e2a\u7f51\u7edc\u8fde\u63a5\uff1f\u6211\u60f3\u6211\u6709\u5fc5\u8981\u5355\u72ec\u53d1\u4e00\u7bc7\u6587\u7ae0\u6765\u597d\u597d\u8bf4\u4e00\u4e0b\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n

\u5f88\u591a\u540c\u5b66\u770b\u5230\u8fd9\u4e2a\u95ee\u9898\u7684\u7b2c\u4e00\u53cd\u5e94\u662f65535\u3002\u539f\u56e0\u662f\uff1a\u201c\u542c\u8bf4\u7aef\u53e3\u53f7\u6700\u591a\u670965535\u4e2a\uff0c\u90a3\u957f\u8fde\u63a5\u5c31\u6700\u591a\u4fdd\u630165535\u4e2a\u4e86\u201d\u3002\u662f\u8fd9\u6837\u7684\u5417\uff1f\u8fd8\u6709\u7684\u4eba\u8bf4\uff1a\u201c\u5e94\u8be5\u53d7TCP\u8fde\u63a5\u91cc\u56db\u5143\u7ec4\u7684\u7a7a\u95f4\u5927\u5c0f\u9650\u5236\uff0c\u7b97\u8d77\u6765\u662f200\u591a\u4e07\u4ebf\u4e2a\uff01\u201d<\/p>\n

\u5982\u679c\u4f60\u5bf9\u8fd9\u4e2a\u95ee\u9898\u4e5f\u662f\u7406\u89e3\u7684\u4e0d\u591f\u5f7b\u5e95\uff0c\u90a3\u4e48\u4eca\u5929\u8bb2\u4e2a\u6545\u4e8b\u8bb2\u7ed9\u4f60\u542c\uff01<\/p>\n

\u4e00\u6b21\u5173\u4e8e\u670d\u52a1\u5668\u7aef\u5e76\u53d1\u7684\u804a\u5929<\/h2>\n

\"\u56fe\u7247\"<\/p>\n

“TCP\u8fde\u63a5\u56db\u5143\u7ec4\u662f\u6e90IP\u5730\u5740\u3001\u6e90\u7aef\u53e3\u3001\u76ee\u7684IP\u5730\u5740\u548c\u76ee\u7684\u7aef\u53e3\u3002\u4efb\u610f\u4e00\u4e2a\u5143\u7d20\u53d1\u751f\u4e86\u6539\u53d8\uff0c\u90a3\u4e48\u5c31\u4ee3\u8868\u7684\u662f\u4e00\u6761\u5b8c\u5168\u4e0d\u540c\u7684\u8fde\u63a5\u4e86\u3002\u62ff\u6211\u7684Nginx\u4e3e\u4f8b\uff0c\u5b83\u7684\u7aef\u53e3\u662f\u56fa\u5b9a\u4f7f\u752880\u3002\u53e6\u5916\u6211\u7684IP\u4e5f\u662f\u56fa\u5b9a\u7684\uff0c\u8fd9\u6837\u76ee\u7684IP\u5730\u5740\u3001\u76ee\u7684\u7aef\u53e3\u90fd\u662f\u56fa\u5b9a\u7684\u3002\u5269\u4e0b\u6e90IP\u5730\u5740\u3001\u6e90\u7aef\u53e3\u662f\u53ef\u53d8\u7684\u3002\u6240\u4ee5\u7406\u8bba\u4e0a\u6211\u7684Nginx\u4e0a\u6700\u591a\u53ef\u4ee5\u5efa\u7acb2\u768432\u6b21\u65b9\uff08ip\u6570\uff09\u00d72\u768416\u6b21\u65b9\uff08port\u6570\uff09\u4e2a\u8fde\u63a5\u3002\u8fd9\u662f\u4e24\u767e\u591a\u4e07\u4ebf\u7684\u4e00\u4e2a\u5927\u6570\u5b57\uff01\uff01”<\/p><\/blockquote>\n

\"\u56fe\u7247\"<\/p>\n

“\u8fdb\u7a0b\u6bcf\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\uff08linux\u4e0b\u4e00\u5207\u7686\u6587\u4ef6\uff0c\u5305\u62ecsocket\uff09\uff0c\u90fd\u4f1a\u6d88\u8017\u4e00\u5b9a\u7684\u5185\u5b58\u8d44\u6e90\u3002\u5982\u679c\u6709\u4e0d\u6000\u597d\u5fc3\u7684\u4eba\u542f\u52a8\u4e00\u4e2a\u8fdb\u7a0b\u6765\u65e0\u9650\u7684\u521b\u5efa\u548c\u6253\u5f00\u65b0\u7684\u6587\u4ef6\uff0c\u4f1a\u8ba9\u670d\u52a1\u5668\u5d29\u6e83\u3002\u6240\u4ee5linux\u7cfb\u7edf\u51fa\u4e8e\u5b89\u5168\u89d2\u5ea6\u7684\u8003\u8651\uff0c\u5728\u591a\u4e2a\u4f4d\u7f6e\u90fd\u9650\u5236\u4e86\u53ef\u6253\u5f00\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u6570\u91cf\uff0c\u5305\u62ec\u7cfb\u7edf\u7ea7\u3001\u7528\u6237\u7ea7\u3001\u8fdb\u7a0b\u7ea7\u3002\u8fd9\u4e09\u4e2a\u9650\u5236\u7684\u542b\u4e49\u548c\u4fee\u6539\u65b9\u5f0f\u5982\u4e0b\uff1a”<\/p><\/blockquote>\n

    \n
  • \n
    \u7cfb\u7edf\u7ea7\uff1a\u5f53\u524d\u7cfb\u7edf\u53ef\u6253\u5f00\u7684\u6700\u5927\u6570\u91cf\uff0c\u901a\u8fc7fs.file-max\u53c2\u6570\u53ef\u4fee\u6539<\/section>\n<\/li>\n
  • \n
    \u7528\u6237\u7ea7\uff1a\u6307\u5b9a\u7528\u6237\u53ef\u6253\u5f00\u7684\u6700\u5927\u6570\u91cf\uff0c\u4fee\u6539\/etc\/security\/limits.conf<\/section>\n<\/li>\n
  • \n
    \u8fdb\u7a0b\u7ea7\uff1a\u5355\u4e2a\u8fdb\u7a0b\u53ef\u6253\u5f00\u7684\u6700\u5927\u6570\u91cf\uff0c\u901a\u8fc7fs.nr_open\u53c2\u6570\u53ef\u4fee\u6539<\/section>\n<\/li>\n<\/ul>\n

    \"\u56fe\u7247\"<\/p>\n

    “\u6211\u7684\u63a5\u6536\u7f13\u5b58\u533a\u5927\u5c0f\u662f\u53ef\u4ee5\u914d\u7f6e\u7684\uff0c\u901a\u8fc7sysctl\u547d\u4ee4\u5c31\u53ef\u4ee5\u67e5\u770b\u3002”<\/p><\/blockquote>\n

    $\u00a0sysctl\u00a0-a\u00a0|\u00a0grep\u00a0rmem\r\nnet.ipv4.tcp_rmem\u00a0=\u00a04096\u00a087380\u00a08388608\r\nnet.core.rmem_default\u00a0=\u00a0212992\r\nnet.core.rmem_max\u00a0=\u00a08388608\r\n<\/code><\/pre>\n
    “\u5176\u4e2d\u5728tcp_rmem”\u4e2d\u7684\u7b2c\u4e00\u4e2a\u503c\u662f\u4e3a\u4f60\u4eec\u7684TCP\u8fde\u63a5\u6240\u9700\u5206\u914d\u7684\u6700\u5c11\u5b57\u8282\u6570\u3002\u8be5\u503c\u9ed8\u8ba4\u662f4K\uff0c\u6700\u5927\u7684\u8bdd8MB\u4e4b\u591a\u3002\u4e5f\u5c31\u662f\u8bf4\u4f60\u4eec\u6709\u6570\u636e\u53d1\u9001\u7684\u65f6\u5019\u6211\u9700\u8981\u81f3\u5c11\u4e3a\u5bf9\u5e94\u7684socket\u518d\u5206\u914d4K\u5185\u5b58\uff0c\u751a\u81f3\u53ef\u80fd\u66f4\u5927\u3002”<\/p><\/blockquote>\n
    \"\u56fe\u7247\"<\/p>\n
    “TCP\u5206\u914d\u53d1\u9001\u7f13\u5b58\u533a\u7684\u5927\u5c0f\u53d7\u53c2\u6570net.ipv4.tcp_wmem\u914d\u7f6e\u5f71\u54cd\u3002”<\/p><\/blockquote>\n
    $\u00a0sysctl\u00a0-a\u00a0|\u00a0grep\u00a0wmem\r\nnet.ipv4.tcp_wmem\u00a0=\u00a04096\u00a065536\u00a08388608\r\nnet.core.wmem_default\u00a0=\u00a0212992\r\nnet.core.wmem_max\u00a0=\u00a08388608\r\n<\/code><\/pre>\n
    “\u5728net.ipv4.tcp_wmem”\u4e2d\u7684\u7b2c\u4e00\u4e2a\u503c\u662f\u53d1\u9001\u7f13\u5b58\u533a\u7684\u6700\u5c0f\u503c\uff0c\u9ed8\u8ba4\u4e5f\u662f4K\u3002\u5f53\u7136\u4e86\u5982\u679c\u6570\u636e\u5f88\u5927\u7684\u8bdd\uff0c\u8be5\u7f13\u5b58\u533a\u5b9e\u9645\u5206\u914d\u7684\u4e5f\u4f1a\u6bd4\u9ed8\u8ba4\u503c\u5927\u3002”<\/p><\/blockquote>\n
    \"\u56fe\u7247\"<\/p>\n
    \u670d\u52a1\u7aef\u767e\u4e07\u8fde\u63a5\u8fbe\u6210\u8bb0<\/h2>\n
    \"\u56fe\u7247\"<\/p>\n
    \u201c\u51c6\u5907\u5565\u5462\uff0c\u8fd8\u8bb0\u5f97\u524d\u9762\u8bf4\u8fc7Linux\u5bf9\u6700\u5927\u6587\u4ef6\u5bf9\u8c61\u6570\u91cf\u6709\u9650\u5236\uff0c\u6240\u4ee5\u8981\u60f3\u5b8c\u6210\u8fd9\u4e2a\u5b9e\u9a8c\uff0c\u5f97\u5728\u7528\u6237\u7ea7\u3001\u7cfb\u7edf\u7ea7\u3001\u8fdb\u7a0b\u7ea7\u7b49\u4f4d\u7f6e\u628a\u8fd9\u4e2a\u4e0a\u9650\u52a0\u5927\u3002\u6211\u4eec\u5b9e\u9a8c\u76ee\u7684\u662f100W\uff0c\u8fd9\u91cc\u90fd\u8bbe\u7f6e\u6210110W\uff0c\u8fd9\u4e2a\u5f88\u91cd\u8981\uff01\u56e0\u4e3a\u5f97\u4fdd\u8bc1\u505a\u5b9e\u9a8c\u7684\u65f6\u5019\u5176\u5b83\u57fa\u7840\u547d\u4ee4\u4f8b\u5982ps\uff0cvi\u7b49\u662f\u53ef\u7528\u7684\u3002\u201c<\/p><\/blockquote>\n
    \"\u56fe\u7247\"<\/p>\n
    \"\u56fe\u7247\"<\/p>\n
    \u6d3b\u52a8\u8fde\u63a5\u6570\u91cf\u786e\u5b9e\u8fbe\u5230\u4e86100W\uff1a<\/p>\n
    $\u00a0ss\u00a0-n\u00a0|\u00a0grep\u00a0ESTAB\u00a0|\u00a0wc\u00a0-l\u00a0\u00a0\r\n1000024\r\n<\/code><\/pre>\n
    \u5f53\u524d\u673a\u5668\u5185\u5b58\u603b\u5171\u662f3.9GB\uff0c\u5176\u4e2d\u5185\u6838Slab\u5360\u7528\u4e863.2GB\u4e4b\u591a\u3002MemFree\u548cBuffers\u52a0\u8d77\u6765\u4e5f\u53ea\u5269\u4e0b100\u591aMB\u4e86\uff1a<\/p>\n
    $\u00a0cat\u00a0\/proc\/meminfo\r\nMemTotal:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a03922956\u00a0kB\r\nMemFree:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a096652\u00a0kB\r\nMemAvailable:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a06448\u00a0kB\r\nBuffers:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a044396\u00a0kB\r\n......\r\nSlab:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a03241244KB\u00a0kB\r\n<\/code><\/pre>\n
    \u901a\u8fc7slabtop\u547d\u4ee4\u53ef\u4ee5\u67e5\u770b\u5230densty\u3001flip\u3001sock_inode_cache\u3001TCP\u56db\u4e2a\u5185\u6838\u5bf9\u8c61\u90fd\u5206\u522b\u6709100W\u4e2a\uff1a<\/p>\n
    \"\u56fe\u7247\"<\/section>\n
    \"\u56fe\u7247\"<\/p>\n
    \u7ed3\u8bed<\/h2>\n
    \u4e92\u8054\u7f51\u540e\u7aef\u7684\u4e1a\u52a1\u7279\u70b9\u4e4b\u4e00\u5c31\u662f\u9ad8\u5e76\u53d1. \u4f46\u662f\u4e00\u53f0\u670d\u52a1\u5668\u6700\u5927\u7a76\u7adf\u80fd\u652f\u6301\u591a\u5c11\u4e2aTCP\u8fde\u63a5\uff0c\u8fd9\u4e2a\u95ee\u9898\u4f3c\u4e4e\u5374\u53c8\u5728\u56f0\u60d1\u7740\u5f88\u591a\u540c\u5b66\u3002\u5e0c\u671b\u4eca\u5929\u8fc7\u540e\uff0c\u4f60\u80fd\u591f\u5c06\u8fd9\u4e2a\u95ee\u9898\u8e29\u5728\u811a\u4e0b\u6469\u64e6\uff01<\/p>\n
    \u5b66\u4e60\u662f\u4e00\u4ef6\u75db\u82e6\u7684\u4e8b\u60c5\uff0c\u5c24\u5176\u54b1\u4eec\u53f7\u91cc\u5f88\u591a\u8bfb\u8005\u670b\u53cb\u90fd\u662f\u5de5\u4f5c\u6ee1\u4e00\u5929\u4e86\u518d\u6765\u770b\u6211\u7684\u6280\u672f\u53f7\u7684\u6587\u7ae0\u7684\u3002\u6211\u4e00\u76f4\u90fd\u5728\u7422\u78e8\u5230\u5e95\u600e\u4e48\u6837\u7ec4\u7ec7\u6280\u672f\u5185\u5bb9\u5f62\u5f0f\uff0c\u80fd\u8ba9\u5927\u5bb6\u7406\u89e3\u8d77\u6765\u66f4\u80fd\u7701\u4e00\u70b9\u8111\u7ec6\u80de\u5462\u3002\u8fd9\u7bc7\u670d\u52a1\u5668\u7684\u6700\u5927\u5e76\u53d1\u6570\u7684\u6587\u7ae0\u662f\u65e9\u5c31\u60f3\u53d1\u7684\uff0c\u4f46\u662f\u5199\u4e86\u4e24\u4e09\u4e2a\u7248\u672c\u90fd\u4e0d\u6ee1\u610f\u3002\u4eca\u5929\u7ec8\u4e8e\u60f3\u51fa\u4e86\u4e00\u79cd\u8ba9\u5927\u5bb6\u66f4\u5bb9\u6613\u7406\u89e3\u7684\u65b9\u5f0f\uff0c\u7b97\u8fc7\u4e86\u81ea\u5df1\u8fd9\u5173\u4e86\u3002<\/p>\n
    \u5982\u679c\u60a8\u559c\u6b22\u6211\u7684\u6587\u7ae0\u3001\u5e76\u89c9\u5f97\u5b83\u6709\u7528\uff0c\u671f\u671b\u60a8\u80fd\u4e0d\u541d\u628a\u5b83\u8f6c\u53d1\u5230\u4f60\u7684\u670b\u53cb\u5708\uff0c\u6280\u672f\u7fa4\u3002\u6216\u8005\u54ea\u6015\u662f\u70b9\u4e2a\u8d5e\uff0c\u70b9\u4e2a\u518d\u770b\u90fd\u53ef\u4ee5\u3002\u89e6\u8fbe\u66f4\u591a\u7684\u6280\u672f\u540c\u5b66\u5e76\u6536\u83b7\u5927\u5bb6\u7684\u53cd\u9988\u5c06\u6781\u5927\u5730\u63d0\u5347\u5f66\u98de\u7684\u521b\u4f5c\u52a8\u529b\uff01<\/p>\n
    \u6539\u5929\u518d\u8bb2\u5ba2\u6237\u7aef\uff0c\u656c\u8bf7\u671f\u5f85\uff01\uff01<\/p>\n
    \"\u56fe\u7247\"<\/p>\n<\/section>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
    \u539f\u6587\u5730\u5740   \u4ee3\u7801\u4e0e\u8fdc\u65b9\u00a0\u4eca\u5929<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[],"tags":[117],"class_list":["post-4897","post","type-post","status-publish","format-standard","hentry","tag-01-linux"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/4897","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/comments?post=4897"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/4897\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=4897"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=4897"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=4897"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}