{"id":209142,"date":"2025-09-30T05:41:02","date_gmt":"2025-09-29T21:41:02","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209142\/"},"modified":"2025-09-30T05:41:03","modified_gmt":"2025-09-29T21:41:03","slug":"vps-205","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209142\/","title":{"rendered":"\u9999\u6e2fVPS\u6570\u636e\u5e93\u8fde\u63a5\u8d85\u65f6\uff1f\u5feb\u901f\u6392\u67e5\u4e0e\u4fee\u590d\u5168\u6d41\u7a0b"},"content":{"rendered":"<p>\u5728\u8fd0\u884c\u7f51\u7ad9\u6216\u5e94\u7528\u65f6\uff0c\u9047\u5230\u6570\u636e\u5e93\u8fde\u63a5\u8d85\u65f6\u662f\u5e38\u89c1\u4f46\u4ee4\u4eba\u5934\u75db\u7684\u95ee\u9898\u3002\u5c24\u5176\u5bf9\u4e8e\u4f7f\u7528\u9999\u6e2fVPS\u90e8\u7f72\u7684\u7ad9\u70b9\uff0c\u7528\u6237\u5206\u5e03\u3001\u7f51\u7edc\u8def\u5f84\u4e0e\u6570\u636e\u5e93\u914d\u7f6e\u90fd\u4f1a\u5f71\u54cd\u8fde\u63a5\u7a33\u5b9a\u6027\u3002\u672c\u6587\u5c06\u4ece\u539f\u7406\u5230\u5b9e\u8df5\uff0c\u63d0\u4f9b\u4e00\u5957\u7cfb\u7edf\u7684\u5feb\u901f\u6392\u67e5\u4e0e\u4fee\u590d\u6d41\u7a0b\uff0c\u5e2e\u52a9\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u4e0e\u5f00\u53d1\u8005\u5728\u6700\u77ed\u65f6\u95f4\u5185\u5b9a\u4f4d\u5e76\u89e3\u51b3\u6570\u636e\u5e93\u8fde\u63a5\u8d85\u65f6\u95ee\u9898\u3002<\/p>\n<h2>\u6570\u636e\u5e93\u8fde\u63a5\u8d85\u65f6\u7684\u57fa\u672c\u539f\u7406<\/h2>\n<p>\u6570\u636e\u5e93\u8fde\u63a5\u8d85\u65f6\u901a\u5e38\u662f\u6307\u5ba2\u6237\u7aef\u5728\u5c1d\u8bd5\u4e0e\u6570\u636e\u5e93\u5efa\u7acb\u8fde\u63a5\u6216\u6267\u884c\u67e5\u8be2\u65f6\uff0c\u8d85\u8fc7\u9884\u8bbe\u7684\u7b49\u5f85\u65f6\u95f4\u4ecd\u672a\u5f97\u5230\u54cd\u5e94\u800c\u4e2d\u65ad\u7684\u60c5\u51b5\u3002\u5e38\u89c1\u89e6\u53d1\u70b9\u5305\u62ec\u7f51\u7edc\u5ef6\u8fdf\u3001\u8fde\u63a5\u6c60\u8017\u5c3d\u3001\u6570\u636e\u5e93\u8d1f\u8f7d\u8fc7\u9ad8\u3001\u914d\u7f6e\u4e0d\u5f53\u548c\u9632\u706b\u5899\u7b56\u7565\u3002\u7406\u89e3\u8fd9\u4e9b\u539f\u7406\u6709\u52a9\u4e8e\u5feb\u901f\u5b9a\u4f4d\u6839\u56e0\u3002<\/p>\n<h3>\u7f51\u7edc\u5c42\u9762<\/h3>\n<ul>\n<li>\u8def\u7531\u4e0e\u4e22\u5305\uff1a\u4ece\u4e1a\u52a1\u670d\u52a1\u5668\u5230\u6570\u636e\u5e93\u670d\u52a1\u5668\u7684\u8def\u5f84\u4e2d\uff0c\u5982\u679c\u5b58\u5728\u4e22\u5305\u6216\u8def\u7531\u5f02\u5e38\uff0c\u4f1a\u9020\u6210\u63e1\u624b\/\u6570\u636e\u5305\u91cd\u4f20\uff0c\u5bfc\u81f4\u8d85\u65f6\u3002<\/li>\n<li>\u5e26\u5bbd\u4e0e\u5ef6\u8fdf\uff1a\u5c24\u5176\u5f53\u6570\u636e\u5e93\u548c\u5e94\u7528\u90e8\u7f72\u5728\u4e0d\u540c\u5730\u57df\uff08\u5982\u9999\u6e2fVPS\u8bbf\u95ee\u7f8e\u56fd\u670d\u52a1\u5668\uff09\u65f6\uff0c\u8de8\u6d0b\u5ef6\u8fdf\u548c\u6296\u52a8\u4f1a\u663e\u8457\u5f71\u54cd\u8fde\u63a5\u7a33\u5b9a\u6027\u3002<\/li>\n<\/ul>\n<h3>\u5e94\u7528\u5c42\u9762<\/h3>\n<ul>\n<li>\u8fde\u63a5\u6c60\u914d\u7f6e\uff1a\u8fc7\u4f4e\u7684\u6700\u5927\u8fde\u63a5\u6570\uff08max_connections\u3001pool_size\uff09\u4f1a\u5bfc\u81f4\u5e76\u53d1\u8bf7\u6c42\u6392\u961f\u751a\u81f3\u88ab\u62d2\u7edd\uff0c\u8868\u73b0\u4e3a\u8fde\u63a5\u8d85\u65f6\u3002<\/li>\n<li>\u6162\u67e5\u8be2\u4e0e\u9501\u7ade\u4e89\uff1a\u957f\u65f6\u95f4\u8fd0\u884c\u7684\u67e5\u8be2\u6216\u4e8b\u52a1\u9501\u4f1a\u5360\u7528\u8fde\u63a5\uff0c\u5ef6\u957f\u5176\u4ed6\u8bf7\u6c42\u7684\u7b49\u5f85\u65f6\u95f4\u3002<\/li>\n<\/ul>\n<h3>\u6570\u636e\u5e93\u4e0e\u7cfb\u7edf\u5c42\u9762<\/h3>\n<ul>\n<li>\u6570\u636e\u5e93\u8d44\u6e90\u74f6\u9888\uff1aCPU\u3001\u5185\u5b58\u6216IO\u9971\u548c\u4f1a\u8ba9\u6570\u636e\u5e93\u54cd\u5e94\u53d8\u6162\u3002<\/li>\n<li>TCP\u53c2\u6570\u4e0e\u8d85\u65f6\u8bbe\u7f6e\uff1a\u64cd\u4f5c\u7cfb\u7edf\u5c42\u9762\u7684tcp_fin_timeout\u3001net.ipv4.tcp_tw_reuse\u7b49\u53c2\u6570\u4f1a\u5f71\u54cd\u8fde\u63a5\u56de\u6536\u4e0e\u91cd\u8fde\u884c\u4e3a\u3002<\/li>\n<\/ul>\n<h2>\u5feb\u901f\u6392\u67e5\u6d41\u7a0b\uff08\u6b65\u9aa4\u5316\u5b9e\u64cd\uff09<\/h2>\n<p>\u4e0b\u9762\u7ed9\u51fa\u4e00\u5957\u6709\u6b21\u5e8f\u7684\u6392\u67e5\u6d41\u7a0b\uff0c\u4fbf\u4e8e\u73b0\u573a\u5feb\u901f\u5b9a\u4f4d\u95ee\u9898\u3002<\/p>\n<h3>1. \u590d\u73b0\u4e0e\u6536\u96c6\u8bc1\u636e<\/h3>\n<ul>\n<li>\u786e\u8ba4\u9519\u8bef\u4fe1\u606f\uff1a\u67e5\u770b\u5e94\u7528\u65e5\u5fd7\uff08\u5982PHP\/Java\/Node\uff09\u4e2d\u7684\u5f02\u5e38\u6808\uff0c\u8bb0\u5f55\u8d85\u65f6\u9519\u8bef\u7c7b\u578b\uff08\u8fde\u63a5\u8d85\u65f6 connect timeout vs \u67e5\u8be2\u8d85\u65f6 query timeout\uff09\u3002<\/li>\n<li>\u8bb0\u5f55\u65f6\u95f4\u7a97\u53e3\uff1a\u786e\u5b9a\u53d1\u751f\u9891\u7387\u3001\u662f\u5426\u5b58\u5728\u56fa\u5b9a\u65f6\u95f4\u6bb5\u6216\u9ad8\u5e76\u53d1\u573a\u666f\u89e6\u53d1\u3002<\/li>\n<\/ul>\n<h3>2. \u7f51\u7edc\u8bca\u65ad<\/h3>\n<ul>\n<li>Ping \u4e0e Traceroute\uff1a\u4f7f\u7528 <strong>ping<\/strong> \u548c <strong>traceroute<\/strong> \u68c0\u67e5\u5230\u6570\u636e\u5e93\u670d\u52a1\u5668\u7684\u8fde\u901a\u6027\u4e0e\u4e2d\u95f4\u8def\u7531\u8df3\u6570\uff0c\u5c24\u5176\u5224\u65ad\u4ece\u9999\u6e2fVPS\u5230\u76ee\u6807\u6570\u636e\u5e93\uff08\u53ef\u80fd\u4f4d\u4e8e\u7f8e\u56fd\u670d\u52a1\u5668\u6216\u9999\u6e2f\u670d\u52a1\u5668\uff09\u662f\u5426\u5b58\u5728\u5f02\u5e38\u8def\u7531\u3002<\/li>\n<li>mtr \u6216 pathping\uff1a\u957f\u65f6\u95f4\u89c2\u6d4b\u4e22\u5305\u7387\u4e0e\u5ef6\u8fdf\u6296\u52a8\u3002<\/li>\n<li>\u7aef\u53e3\u8fde\u901a\u6027\uff1a\u4f7f\u7528 <strong>telnet \u4e3b\u673a \u7aef\u53e3<\/strong> \u6216 <strong>nc -zv<\/strong> \u68c0\u67e5\u6570\u636e\u5e93\u7aef\u53e3\u662f\u5426\u53ef\u8fbe\uff08MySQL 3306\u3001Postgres 5432 \u7b49\uff09\u3002<\/li>\n<\/ul>\n<h3>3. \u6570\u636e\u5e93\u7aef\u5065\u5eb7\u68c0\u67e5<\/h3>\n<ul>\n<li>\u67e5\u770b\u6162\u67e5\u8be2\u65e5\u5fd7\u4e0e\u5f53\u524d\u8fde\u63a5\uff1a\u5bf9 MySQL \u4f7f\u7528 <strong>SHOW PROCESSLIST<\/strong>\uff0c\u5bf9 PostgreSQL \u4f7f\u7528 <strong>pg_stat_activity<\/strong>\uff0c\u627e\u51fa\u957f\u65f6\u95f4\u5360\u7528\u8fde\u63a5\u7684\u8bed\u53e5\u3002<\/li>\n<li>\u68c0\u67e5\u9501\u4e0e\u8868\u7ea7\u7b49\u5f85\uff1a\u4f7f\u7528 <strong>INFORMATION_SCHEMA.INNODB_LOCKS<\/strong> \u6216 PostgreSQL \u7684\u9501\u89c6\u56fe\u5b9a\u4f4d\u9501\u7b49\u5f85\u3002<\/li>\n<li>\u8d44\u6e90\u76d1\u63a7\uff1a\u901a\u8fc7 top\/iostat\/vmstat \u6216\u6570\u636e\u5e93\u81ea\u5e26\u76d1\u63a7\u786e\u8ba4 CPU\u3001IO\u3001\u5185\u5b58\u662f\u5426\u51fa\u73b0\u74f6\u9888\u3002<\/li>\n<\/ul>\n<h3>4. \u5e94\u7528\u7aef\u8bca\u65ad<\/h3>\n<ul>\n<li>\u8fde\u63a5\u6c60\u72b6\u6001\uff1a\u67e5\u770b\u6c60\u4e2d\u6d3b\u8dc3\u8fde\u63a5\u6570\u3001\u7b49\u5f85\u6570\u548c\u6700\u5927\u9608\u503c\uff08\u4f8b\u5982 HikariCP\u3001c3p0\u3001PM2 \u5bf9\u5e94\u6307\u6807\uff09\u3002<\/li>\n<li>\u8d85\u65f6\u9608\u503c\u8bbe\u7f6e\uff1a\u786e\u8ba4 JDBC\/ODBC \u7684 connectTimeout\u3001socketTimeout\u3001\u547d\u4ee4\u6267\u884c\u8d85\u65f6\u7b49\u662f\u5426\u5408\u7406\u3002<\/li>\n<li>\u91cd\u8bd5\u7b56\u7565\uff1a\u8fc7 aggressive \u7684\u81ea\u52a8\u91cd\u8bd5\u53ef\u80fd\u9020\u6210\u96ea\u5d29\u6548\u5e94\uff0c\u4f7f\u95ee\u9898\u6076\u5316\u3002<\/li>\n<\/ul>\n<h2>\u5e38\u89c1\u539f\u56e0\u4e0e\u5bf9\u5e94\u4fee\u590d\u65b9\u6848\uff08\u7ec6\u5316\uff09<\/h2>\n<h3>\u7f51\u7edc\u76f8\u5173\u4fee\u590d<\/h3>\n<ul>\n<li>\u4f18\u5316\u8def\u7531\uff1a\u4e0e\u673a\u623f\u6216\u4e91\u670d\u52a1\u5546\u6c9f\u901a\uff0c\u5bfb\u627e\u66f4\u4f18\u7684\u51fa\u53e3\u6216 BGP \u8def\u7531\uff0c\u51cf\u5c11\u8de8\u5883\u8bbf\u95ee\u6296\u52a8\u3002\u9999\u6e2fVPS \u4e00\u822c\u53ef\u4ee5\u83b7\u5f97\u8f83\u4f4e\u7684\u4e9a\u592a\u5ef6\u8fdf\uff0c\u4f46\u8bbf\u95ee\u7f8e\u56fdVPS\/\u7f8e\u56fd\u670d\u52a1\u5668 \u65f6\u9700\u8003\u8651\u8de8\u6d0b\u5ef6\u8fdf\u3002<\/li>\n<li>\u542f\u7528\u79c1\u7f51\u6216 VPN\uff1a\u82e5\u6570\u636e\u5e93\u4e0e\u5e94\u7528\u8de8\u5730\u57df\u90e8\u7f72\uff0c\u8003\u8651\u5c06\u6570\u636e\u5e93\u8fc1\u79fb\u81f3\u540c\u4e00\u673a\u623f\u6216\u542f\u7528\u4e13\u7ebf\/VPN\u4ee5\u964d\u4f4e\u5ef6\u8fdf\u4e0e\u4e22\u5305\u3002<\/li>\n<li>\u8c03\u6574 MTU \u4e0e TCP \u53c2\u6570\uff1a\u5728\u9ad8\u4e22\u5305\u73af\u5883\u4e0b\u53ef\u9002\u5f53\u964d\u4f4e MTU\uff0c\u6216\u8c03\u4f18 TCP \u91cd\u8bd5\u6b21\u6570\u4e0e\u8d85\u65f6\u3002<\/li>\n<\/ul>\n<h3>\u6570\u636e\u5e93\u914d\u7f6e\u4e0e\u4f18\u5316<\/h3>\n<ul>\n<li>\u589e\u52a0\u6700\u5927\u8fde\u63a5\u6570\uff1a\u5728\u8d44\u6e90\u5141\u8bb8\u7684\u60c5\u51b5\u4e0b\u63d0\u5347 max_connections\uff0c\u4f46\u8981\u914d\u5408\u8fde\u63a5\u6c60\u4e0e\u5185\u5b58\u8bc4\u4f30\uff0c\u907f\u514d OOM\u3002<\/li>\n<li>\u4f18\u5316\u6162\u67e5\u8be2\uff1a\u901a\u8fc7\u7d22\u5f15\u3001\u67e5\u8be2\u91cd\u5199\u6216\u62c6\u5206\u8bfb\u5199\u8d1f\u8f7d\uff08\u8bfb\u5e93\u590d\u5236\uff09\u6765\u964d\u4f4e\u5355\u67e5\u8be2\u8017\u65f6\uff0c\u4ece\u6839\u672c\u51cf\u5c11\u8fde\u63a5\u5360\u7528\u3002<\/li>\n<li>\u4f7f\u7528\u8fde\u63a5\u6c60\u5e76\u5408\u7406\u914d\u7f6e\uff1a\u8bbe\u7f6e\u5408\u9002\u7684\u6700\u5c0f\/\u6700\u5927\u8fde\u63a5\u3001\u8fde\u63a5\u95f2\u7f6e\u56de\u6536\u65f6\u95f4\u548c\u8fde\u63a5\u6d4b\u8bd5 SQL\uff08\u4f8b\u5982 SELECT 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net.core.somaxconn\u3001tcp_tw_reuse \u7b49\u3002<\/li>\n<li>\u76d1\u63a7\u544a\u8b66\uff1a\u90e8\u7f72 Prometheus\/Grafana\u3001Zabbix \u6216\u4e91\u5382\u5546\u76d1\u63a7\uff0c\u8bbe\u7f6e\u8fde\u63a5\u6570\u3001\u5ef6\u8fdf\u3001\u6162\u67e5\u8be2\u7684\u544a\u8b66\u9608\u503c\uff0c\u5b9e\u73b0\u65e9\u671f\u9884\u8b66\u3002<\/li>\n<\/ul>\n<h2>\u5e94\u7528\u573a\u666f\u4e0e\u4f18\u52bf\u5bf9\u6bd4<\/h2>\n<p>\u4e0d\u540c\u90e8\u7f72\u7b56\u7565\u9002\u914d\u4e0d\u540c\u4e1a\u52a1\u9700\u6c42\uff0c\u4e0b\u9762\u5bf9\u5e38\u89c1\u573a\u666f\u8fdb\u884c\u8bf4\u660e\uff0c\u5305\u542b\u9999\u6e2fVPS\u3001\u9999\u6e2f\u670d\u52a1\u5668\u4e0e\u7f8e\u56fdVPS\/\u7f8e\u56fd\u670d\u52a1\u5668 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