{"id":208848,"date":"2025-09-29T23:23:16","date_gmt":"2025-09-29T15:23:16","guid":{"rendered":"https:\/\/www.server.hk\/blog\/208848\/"},"modified":"2025-09-29T23:23:17","modified_gmt":"2025-09-29T15:23:17","slug":"vps-126","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208848\/","title":{"rendered":"\u9999\u6e2fVPS\u6570\u636e\u5e93\u8fde\u63a5\u8d85\u65f6\uff1f\u5feb\u901f\u5b9a\u4f4d\u4e0e\u5f7b\u5e95\u4fee\u590d\u5168\u653b\u7565"},"content":{"rendered":"<p>\u5728\u9999\u6e2fVPS\u4e0a\u8fd0\u884c\u6570\u636e\u5e93\u670d\u52a1\u65f6\uff0c\u9047\u5230\u201c\u8fde\u63a5\u8d85\u65f6\u201d\u662f\u5e38\u89c1\u4f46\u4ee4\u4eba\u5934\u75bc\u7684\u95ee\u9898\u3002\u5bf9\u4e8e\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u548c\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u5feb\u901f\u5b9a\u4f4d\u5e76\u5f7b\u5e95\u4fee\u590d\u8fd9\u79cd\u6545\u969c\uff0c\u4e0d\u4ec5\u80fd\u6062\u590d\u4e1a\u52a1\u53ef\u7528\u6027\uff0c\u8fd8\u80fd\u4f18\u5316\u6027\u80fd\u548c\u6210\u672c\u3002\u672c\u7bc7\u6587\u7ae0\u4ece\u5e95\u5c42\u539f\u7406\u3001\u8bca\u65ad\u5de5\u5177\u3001\u5e38\u89c1\u573a\u666f\u3001\u914d\u7f6e\u7ea7\u4fee\u590d\u5230\u9009\u8d2d\u5efa\u8bae\uff0c\u63d0\u4f9b\u4e00\u5957\u7cfb\u7edf\u5316\u7684\u6392\u67e5\u4e0e\u4fee\u590d\u6d41\u7a0b\uff0c\u9002\u7528\u4e8e\u9999\u6e2fVPS\u4ee5\u53ca\u6a2a\u5411\u5bf9\u6bd4\u7f8e\u56fdVPS\u3001\u9999\u6e2f\u670d\u52a1\u5668\u4e0e\u7f8e\u56fd\u670d\u52a1\u5668\u7684\u7f51\u7edc\u4e0e\u8fd0\u7ef4\u5dee\u5f02\u3002<\/p>\n<h2>\u4e3a\u4f55\u4f1a\u51fa\u73b0\u6570\u636e\u5e93\u8fde\u63a5\u8d85\u65f6\u2014\u2014\u5e95\u5c42\u539f\u7406\u89e3\u6790<\/h2>\n<p>\u6570\u636e\u5e93\u8fde\u63a5\u8d85\u65f6\u901a\u5e38\u53d1\u751f\u5728\u5ba2\u6237\u7aef\u4e0e\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e4b\u95f4\u7684TCP\u4e09\u6b21\u63e1\u624b\u3001\u5e94\u7528\u5c42\u8ba4\u8bc1\u6216\u67e5\u8be2\u6267\u884c\u9636\u6bb5\u8d85\u65f6\u3002\u8981\u7406\u89e3\u95ee\u9898\uff0c\u9700\u638c\u63e1\u4ee5\u4e0b\u51e0\u4e2a\u6838\u5fc3\u8981\u7d20\uff1a<\/p>\n<ul>\n<li><strong>\u7f51\u7edc\u5c42\uff08TCP\/IP\uff09\u5ef6\u8fdf\u4e0e\u4e22\u5305\uff1a<\/strong>\u9ad8\u5ef6\u8fdf\u6216\u4e22\u5305\u4f1a\u5bfc\u81f4\u8fde\u63a5\u63e1\u624b\u5931\u8d25\u6216\u6570\u636e\u5305\u91cd\u4f20\uff0c\u5e38\u89c1\u4e8e\u8de8\u5730\u57df\u8bbf\u95ee\uff08\u5982\u4ece\u7f8e\u56fd\u8bbf\u95ee\u9999\u6e2fVPS\uff09\u6216\u94fe\u8def\u8d28\u91cf\u5dee\u7684\u73af\u5883\u3002<\/li>\n<li><strong>\u9632\u706b\u5899\u4e0e\u5b89\u5168\u7ec4\uff1a<\/strong>\u670d\u52a1\u5668\u6240\u5728VPS\u63d0\u4f9b\u5546\u7684\u9632\u706b\u5899\u3001\u64cd\u4f5c\u7cfb\u7edf\u5c42\u7684iptables\/ufw\u6216\u4e91\u63a7\u5236\u9762\u7684\u5b89\u5168\u7ec4\u89c4\u5219\uff0c\u53ef\u80fd\u963b\u65ad\u6216\u9650\u5236\u7279\u5b9a\u7aef\u53e3\uff08\u5982MySQL\u76843306\u3001Postgres\u76845432\uff09\u3002<\/li>\n<li><strong>\u6570\u636e\u5e93\u914d\u7f6e\u9650\u5236\uff1a<\/strong>\u53c2\u6570\u5982 wait_timeout\u3001interactive_timeout\u3001connect_timeout\uff08MySQL\uff09\u3001max_connections \u7b49\uff0c\u4f1a\u76f4\u63a5\u5f71\u54cd\u8fde\u63a5\u5efa\u7acb\u4e0e\u7ef4\u6301\u3002<\/li>\n<li><strong>\u5e94\u7528\u5c42\u8fde\u63a5\u7ba1\u7406\uff1a<\/strong>\u4e0d\u5408\u7406\u7684\u8fde\u63a5\u6c60\u914d\u7f6e\u3001\u957f\u4e8b\u52a1\u672a\u63d0\u4ea4\u3001\u672a\u5173\u95ed\u7684\u8fde\u63a5\u4f1a\u5bfc\u81f4\u8fde\u63a5\u8017\u5c3d\u6216\u54cd\u5e94\u5ef6\u8fdf\u3002<\/li>\n<li><strong>\u8d44\u6e90\u74f6\u9888\uff1a<\/strong>VPS\u7684CPU\u3001\u5185\u5b58\u6216I\/O\u8fbe\u74f6\u9888\u65f6\uff0c\u6570\u636e\u5e93\u54cd\u5e94\u53d8\u6162\uff0c\u8fdb\u800c\u89e6\u53d1\u5ba2\u6237\u7aef\u8d85\u65f6\u3002<\/li>\n<\/ul>\n<h3>\u5e38\u7528\u8bca\u65ad\u5de5\u5177\u4e0e\u6307\u6807<\/h3>\n<ul>\n<li>ping\u3001traceroute\uff1a\u5224\u65ad\u7f51\u7edc\u8fde\u901a\u6027\u4e0e\u8df3\u6570\u5ef6\u8fdf\u3002<\/li>\n<li>telnet \u6216 nc\uff08netcat\uff09\uff1a\u68c0\u6d4b\u7aef\u53e3\u8fde\u901a\u6027\uff08\u4f8b\u5982\uff1atelnet host 3306\uff09\u3002<\/li>\n<li>ss \/ netstat\uff1a\u67e5\u770b\u5f53\u524dTCP\u8fde\u63a5\u4e0e\u76d1\u542c\u7aef\u53e3\u72b6\u6001\u3002<\/li>\n<li>tcpdump \/ wireshark\uff1a\u6293\u5305\u5206\u6790TCP\u4e09\u6b21\u63e1\u624b\u3001\u91cd\u4f20\u3001RST\u7b49\u95ee\u9898\u3002<\/li>\n<li>iperf\uff1a\u6d4b\u91cf\u5e26\u5bbd\u4e0e\u541e\u5410\u5411\u95ee\u9898\u5b9a\u4f4d\u3002<\/li>\n<li>\u6570\u636e\u5e93\u81ea\u5e26\u8bca\u65ad\uff1aSHOW PROCESSLIST\u3001SHOW GLOBAL STATUS\uff08MySQL\uff09\u6216 pg_stat_activity\uff08Postgres\uff09\u3002<\/li>\n<\/ul>\n<h2>\u5178\u578b\u573a\u666f\u4e0e\u9010\u6b65\u6392\u67e5\u7b56\u7565<\/h2>\n<p>\u4e0b\u9762\u6309\u5e38\u89c1\u573a\u666f\u7ed9\u51fa\u5177\u4f53\u6392\u67e5\u6b65\u9aa4\u4e0e\u89e3\u51b3\u65b9\u6848\uff0c\u65b9\u4fbf\u5728\u73b0\u5b9e\u8fd0\u7ef4\u4e2d\u5feb\u901f\u5b9a\u4f4d\u5e76\u4fee\u590d\u3002<\/p>\n<h3>\u573a\u666f\u4e00\uff1a\u65e0\u6cd5\u5efa\u7acbTCP\u8fde\u63a5\uff08\u5ba2\u6237\u7aef\u62a5\u8fde\u63a5\u8d85\u65f6\uff09<\/h3>\n<ul>\n<li>\u7b2c1\u6b65\uff1a\u4ece\u5ba2\u6237\u7aef\u6267\u884c <strong>telnet db_host 3306<\/strong> \u6216 <strong>nc -vz db_host 3306<\/strong>\uff0c\u5982\u679c\u65e0\u6cd5\u8fde\u63a5\uff0c\u8bf4\u660e\u94fe\u8def\u6216\u9632\u706b\u5899\u95ee\u9898\u3002<\/li>\n<li>\u7b2c2\u6b65\uff1a\u4f7f\u7528 traceroute\/tracert \u786e\u8ba4\u5230\u9999\u6e2fVPS\u94fe\u8def\u662f\u5426\u5b58\u5728\u7ed5\u8def\u6216\u4e22\u5305\u3002\u82e5\u4ece\u7f8e\u56fd\u6216\u5185\u5730\u5230\u9999\u6e2f\u94fe\u8def\u4e0d\u7a33\u5b9a\uff0c\u8003\u8651\u4f7f\u7528\u66f4\u8fd1\u7684\u8282\u70b9\u6216CDN\u4ee3\u7406\u3002<\/li>\n<li>\u7b2c3\u6b65\uff1a\u5728VPS\u4e0a\u68c0\u67e5 iptables\/ufw \u4e0e\u4e91\u5b89\u5168\u7ec4\u662f\u5426\u653e\u901a\u7aef\u53e3\uff1b\u4f7f\u7528 ss -lnt \u67e5\u770b\u670d\u52a1\u662f\u5426\u76d1\u542c\u5728\u6b63\u786e\u5730\u5740\uff080.0.0.0 \u6216\u5185\u7f51IP\uff09\u3002<\/li>\n<li>\u7b2c4\u6b65\uff1a\u82e5VPS\u4f4d\u4e8e\u79c1\u6709\u7f51\u7edc\uff08NAT\uff09\uff0c\u786e\u8ba4\u7aef\u53e3\u8f6c\u53d1\/\u6d6e\u52a8IP\u5df2\u914d\u7f6e\u3002<\/li>\n<\/ul>\n<h3>\u573a\u666f\u4e8c\uff1a\u80fd\u5efa\u7acb\u8fde\u63a5\u4f46\u8ba4\u8bc1\u6216\u521d\u59cb\u63e1\u624b\u8d85\u65f6<\/h3>\n<ul>\n<li>\u68c0\u67e5\u6570\u636e\u5e93\u7528\u6237\u6743\u9650\u4e0e host \u767d\u540d\u5355\uff08MySQL \u7684 user.host \u5b57\u6bb5\uff09\u3002<\/li>\n<li>\u67e5\u770b\u6570\u636e\u5e93\u9519\u8bef\u65e5\u5fd7\uff08\/var\/log\/mysql\/ \u6216 PostgreSQL \u65e5\u5fd7\uff09\u662f\u5426\u6709 authentication failure \u6216 timeout \u8bb0\u5f55\u3002<\/li>\n<li>\u8c03\u6574\u6570\u636e\u5e93\u7aef\u7684 connect_timeout\uff08\u53ca\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8d85\u65f6\u8bbe\u7f6e\uff09\u4e3a\u5408\u7406\u503c\uff0c\u77ed\u8fde\u63a5\u573a\u666f\u53ef\u9002\u5f53\u964d\u4f4e\uff0c\u957f\u7f51\u7edc\u5ef6\u8fdf\u573a\u666f\u5e94\u589e\u5927\u8d85\u65f6\u65f6\u95f4\u3002<\/li>\n<\/ul>\n<h3>\u573a\u666f\u4e09\uff1a\u8fde\u63a5\u53ef\u5efa\u7acb\u4f46\u67e5\u8be2\u6267\u884c\u6162\u5bfc\u81f4\u5ba2\u6237\u7aef\u8d85\u65f6<\/h3>\n<ul>\n<li>\u4f7f\u7528 SHOW PROCESSLIST \/ EXPLAIN \u5206\u6790\u6162\u67e5\u8be2\uff0c\u589e\u52a0\u7d22\u5f15\u6216\u4f18\u5316 SQL\u3002<\/li>\n<li>\u76d1\u63a7\u6570\u636e\u5e93\u6162\u67e5\u8be2\u65e5\u5fd7\u548c\u7cfb\u7edf\u8d1f\u8f7d\uff08iostat\u3001vmstat\uff09\uff0c\u786e\u8ba4\u662f\u5426\u4e3a\u78c1\u76d8IO\u6216\u5185\u5b58\u4e0d\u8db3\u3002<\/li>\n<li>\u8003\u8651\u5f00\u542f\u67e5\u8be2\u7f13\u5b58\uff08\u89c6\u6570\u636e\u5e93\u7248\u672c\uff09\u6216\u589e\u52a0\u5185\u5b58\u7f13\u51b2\uff08innodb_buffer_pool_size \u7b49\uff09\u3002<\/li>\n<\/ul>\n<h2>\u5f7b\u5e95\u4fee\u590d\uff1a\u914d\u7f6e\u7ea7\u4e0e\u7f51\u7edc\u7ea7\u7684\u6700\u4f73\u5b9e\u8df5<\/h2>\n<p>\u5b9a\u4f4d\u5230\u95ee\u9898\u540e\uff0c\u4ee5\u4e0b\u4e00\u7cfb\u5217\u914d\u7f6e\u4e0e\u67b6\u6784\u5c42\u9762\u7684\u6539\u8fdb\uff0c\u6709\u52a9\u4e8e\u4ece\u6839\u672c\u4e0a\u964d\u4f4e\u6570\u636e\u5e93\u8fde\u63a5\u8d85\u65f6\u7684\u53d1\u751f\u7387\u3002<\/p>\n<h3>\u7f51\u7edc\u4f18\u5316<\/h3>\n<ul>\n<li>\u5408\u7406\u8bbe\u7f6e MTU \u4e0e TCP keepalive\uff08sysctl \u53c2\u6570\uff1anet.ipv4.tcp_keepalive_time\u3001tcp_keepalive_intvl\u3001tcp_keepalive_probes\uff09\uff0c\u907f\u514d\u4e2d\u95f4\u8bbe\u5907\u56e0\u7a7a\u95f2\u8fde\u63a5\u88ab\u5173\u95ed\u3002<\/li>\n<li>\u5728\u8de8\u5883\u8bbf\u95ee\uff08\u5982\u7f8e\u56fd\u8bbf\u95ee\u9999\u6e2fVPS\uff09\u573a\u666f\uff0c\u8003\u8651\u4f7f\u7528\u667a\u80fd\u8def\u7531\u3001SD-WAN \u6216\u90e8\u7f72\u5c31\u8fd1\u7684\u7f8e\u56fdVPS \u4f5c\u4e3a\u5e94\u7528\u5c42\u4ee3\u7406\uff0c\u51cf\u5c11\u5f80\u8fd4\u5ef6\u8fdf\u3002<\/li>\n<li>\u4f7f\u7528 TCP Fast Open \u6216\u8c03\u4f18\u62e5\u585e\u63a7\u5236\u7b97\u6cd5\uff08\u5982 BBR\uff09\u4ee5\u6539\u5584\u9ad8\u5ef6\u8fdf\u7f51\u7edc\u8868\u73b0\uff08\u9700\u8bc4\u4f30\u517c\u5bb9\u6027\uff09\u3002<\/li>\n<\/ul>\n<h3>\u6570\u636e\u5e93\u4e0e\u7cfb\u7edf\u53c2\u6570\u8c03\u6574<\/h3>\n<ul>\n<li>\u8c03\u6574 MySQL \u7684 connect_timeout\u3001wait_timeout\u3001interactive_timeout \u4e0e max_connections\uff0c\u4f7f\u5176\u5339\u914d\u5e94\u7528\u7684\u8fde\u63a5\u6a21\u578b\u3002<\/li>\n<li>\u5bf9\u4e8e\u957f\u65f6\u95f4\u7a7a\u95f2\u4f46\u9700\u5feb\u901f\u590d\u7528\u7684\u8fde\u63a5\uff0c\u5efa\u8bae\u4f7f\u7528\u8fde\u63a5\u6c60\uff08\u5982 HikariCP\u3001c3p0\u3001PgBouncer\uff09\uff0c\u907f\u514d\u9891\u7e41\u5efa\u7acb\/\u5173\u95ed\u8fde\u63a5\u5bfc\u81f4\u7684\u8d85\u65f6\u3002<\/li>\n<li>\u8bbe\u7f6e\u5408\u7406\u7684 innodb_buffer_pool_size\u3001tmp_table_size\u3001max_allowed_packet\uff0c\u4ee5\u907f\u514d\u5185\u5b58\u6216\u4e34\u65f6\u8868\u5bfc\u81f4\u7684\u963b\u585e\u3002<\/li>\n<li>\u76d1\u63a7\u5e76\u9650\u5236\u6162\u4e8b\u52a1\uff1a\u5728\u5e94\u7528\u4e2d\u8bbe\u7f6e\u4e8b\u52a1\u8d85\u65f6 \/ \u53d6\u6d88\u7b56\u7565\uff0c\u51cf\u5c11\u9501\u7b49\u5f85\u5bf9\u65b0\u8fde\u63a5\u7684\u5f71\u54cd\u3002<\/li>\n<\/ul>\n<h3>\u5b89\u5168\u4e0e\u53ef\u7528\u6027\u8bbe\u8ba1<\/h3>\n<ul>\n<li>\u628a\u6570\u636e\u5e93\u53ea\u653e\u5728\u5185\u7f51\u5e76\u901a\u8fc7\u8df3\u677f\u673a\u3001VPN \u6216 SSH \u96a7\u9053\u8bbf\u95ee\uff0c\u51cf\u5c11\u516c\u7f51\u66b4\u9732\u5bfc\u81f4\u7684\u4e0d\u7a33\u5b9a\u3002<\/li>\n<li>\u91c7\u7528\u4e3b\u4ece\/\u8bfb\u5199\u5206\u79bb\u6216\u96c6\u7fa4\uff08MySQL Replication\u3001Galera\u3001Postgres Streaming Replication\uff09\u6765\u5206\u6563\u8d1f\u8f7d\u4e0e\u63d0\u9ad8\u53ef\u7528\u6027\u3002<\/li>\n<li>\u4f7f\u7528\u5065\u5eb7\u68c0\u67e5\u4e0e\u81ea\u52a8\u91cd\u8fde\u673a\u5236\uff08\u6ce8\u610f\u6307\u6570\u9000\u907f\u7b56\u7565\uff09\uff0c\u907f\u514d\u5728\u77ac\u65f6\u7f51\u7edc\u6296\u52a8\u65f6\u9020\u6210\u96ea\u5d29\u6548\u5e94\u3002<\/li>\n<\/ul>\n<h2>\u4f18\u52bf\u5bf9\u6bd4\uff1a\u9999\u6e2fVPS \u4e0e \u7f8e\u56fdVPS\/\u7f8e\u56fd\u670d\u52a1\u5668 \u5728\u6570\u636e\u5e93\u8bbf\u95ee\u4e0a\u7684\u5dee\u5f02<\/h2>\n<p>\u5728\u9009\u62e9\u90e8\u7f72\u5730\u70b9\u65f6\u9700\u6743\u8861\u5ef6\u8fdf\u3001\u5408\u89c4\u4e0e\u6210\u672c\uff1a<\/p>\n<ul>\n<li><strong>\u9999\u6e2fVPS\uff1a<\/strong>\u5bf9\u4e9a\u592a\u7528\u6237\uff08\u5c24\u5176\u4e2d\u56fd\u5185\u5730\uff09\u6709\u6781\u4f4e\u7684\u7f51\u7edc\u5ef6\u8fdf\uff0c\u9002\u5408\u9762\u5411\u4e2d\u6587\u7528\u6237\u7684\u7ad9\u70b9\u4e0e\u5e94\u7528\u3002\u4f46\u5bf9\u5317\u7f8e\u7528\u6237\u8bbf\u95ee\u4f1a\u6709\u66f4\u9ad8 RTT\u3002<\/li>\n<li><strong>\u7f8e\u56fdVPS \/ 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\u6216\u5176\u4ed6\u4f9b\u5e94\u5546\u9009\u8d2d\u9999\u6e2fVPS\u65f6\uff0c\u7740\u91cd\u8003\u8651\u4ee5\u4e0b\u56e0\u7d20\uff1a<\/p>\n<ul>\n<li>\u7f51\u7edc\u8d28\u91cf\u4e0e\u51fa\u53e3\u5e26\u5bbd\uff1a\u4f18\u9009\u591a\u8fd0\u8425\u5546BGP\u6216\u4e13\u7ebf\u8282\u70b9\uff0c\u786e\u4fdd\u8de8\u5883\u94fe\u8def\u7a33\u5b9a\u3002<\/li>\n<li>\u8d44\u6e90\u914d\u6bd4\uff08CPU\u3001\u5185\u5b58\u3001\u78c1\u76d8IO\uff09\uff1a\u6570\u636e\u5e93\u5bf9IO\u548c\u5185\u5b58\u654f\u611f\uff0cSSD\u548c\u8f83\u5927\u5185\u5b58\u66f4\u5173\u952e\u4e8e\u7eafCPU\u3002<\/li>\n<li>\u5907\u4efd\u4e0e\u5feb\u7167\u7b56\u7565\uff1a\u786e\u8ba4\u662f\u5426\u652f\u6301\u81ea\u52a8\u5feb\u7167\u3001\u5f02\u5730\u5907\u4efd\uff0c\u4ee5\u4fbf\u5feb\u901f\u6062\u590d\u3002<\/li>\n<li>\u53ef\u7528\u6027\u4e0e\u6269\u5c55\u80fd\u529b\uff1a\u662f\u5426\u652f\u6301\u5feb\u901f\u5347\u914d\u3001\u5feb\u7167\u514b\u9686\u3001\u79c1\u6709\u7f51\u7edc\u4e0e\u8d1f\u8f7d\u5747\u8861\u3002<\/li>\n<li>\u6280\u672f\u652f\u6301\u4e0e\u76d1\u63a7\u670d\u52a1\uff1a24\/7\u652f\u6301\u4e0e\u57fa\u7840\u76d1\u63a7\u80fd\u663e\u8457\u7f29\u77ed\u6545\u969c\u6392\u67e5\u65f6\u95f4\u3002<\/li>\n<\/ul>\n<p>\u5728\u591a\u5730\u57df\u90e8\u7f72\u65f6\uff0c\u53ef\u5c06\u9999\u6e2fVPS 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