\u9664\u4ee52：\u56e0\u4e3aHTTP\u662f\u201c\u53cc\u5411\u8fde\u63a5\u201d（Nginx\u2194\u5ba2\u6237\u7aef），1\u4e2a\u7528\u6237\u8fde\u63a5\u5b9e\u9645\u53602\u4e2a\u201c\u8fde\u63a5\u540d\u989d\u201d；<\/li>\n<\/ul>\n\u7b97\u4e0b\u6765：16\u00d72\u4e07\/2=16\u4e07，\u8fd9\u5c31\u662f\u6211\u4eec\u7684\u6838\u5fc3\u5e76\u53d1\u76ee\u6807\u3002<\/p>\n
\u4e09\u3001\u76f4\u63a5\u6284\u4f5c\u4e1a！16\u683832G\u4e13\u5c5eNginx\u914d\u7f6e<\/h3>\n
\u4e0b\u9762\u914d\u7f6e\u5206\u6a21\u5757\u6807\u6ce8\u4e86\u201c\u4eba\u8bdd\u89e3\u91ca\u201d，\u590d\u5236\u5230\u4f60\u7684nginx.conf\u91cc\u5c31\u884c（\u8bb0\u5f97\u6539\u65e5\u5fd7\/\u76ee\u5f55\u8def\u5f84）\u3002<\/p>\n
# ===================== \u5168\u5c40\u914d\u7f6e（\u7ed916\u6838CPU\u201c\u5206\u5de5\u201d） =====================
\n# \u7528nginx\u666e\u901a\u7528\u6237\u8fd0\u884c，\u907f\u514droot\u6743\u9650\u98ce\u9669（\u5148\u6267\u884c：useradd -r -s \/sbin\/nologin nginx）
\nuser nginx nginx;
\n# \u81ea\u52a8\u5339\u914d16\u6838CPU，1\u68381\u4e2a\u5de5\u4f5c\u8fdb\u7a0b，\u4e0d\u6d6a\u8d39
\nworker_processes auto;
\n# \u628a\u8fdb\u7a0b\u7ed1\u5b9a\u5230CPU\u6838\u4e0a，\u51cf\u5c11\u201c\u6765\u56de\u5207\u6362\u201d\u7684\u5f00\u9500
\nworker_cpu_affinity auto;
\n# \u7ed9\u6587\u4ef6\u63cf\u8ff0\u7b26\u7559\u8db3\u4f59\u91cf（20\u4e07），\u907f\u514d\u62a5\u201ctoo many open files\u201d
\nworker_rlimit_nofile 204800; <\/p>\n
# \u65e5\u5fd7\u53ea\u8bb0\u9519\u8bef，\u5c11\u5199\u65e5\u5fd7\u7701IO
\nerror_log \/home\/nginx\/logs\/error.log error;
\npid \/home\/nginx\/logs\/nginx.pid;
\n# \u8ba9Nginx\u8fdb\u7a0b\u4f18\u5148\u7ea7\u9ad8\u4e00\u70b9，\u4f46\u4e0d\u62a2\u7cfb\u7edf\u8d44\u6e90
\nworker_priority -5; <\/p>\n
# ===================== events\u6a21\u5757（\u7ba1\u9ad8\u5e76\u53d1\u8fde\u63a5） =====================
\nevents {
\n # \u7528Linux\u6700\u725b\u7684epoll\u6a21\u578b，\u5904\u7406\u8fde\u63a5\u66f4\u5feb（\u522b\u7528select\/poll）
\n use epoll;
\n # \u4e00\u4e2a\u8fdb\u7a0b\u4e00\u6b21\u6027\u63a5\u5b8c\u6240\u6709\u65b0\u8fde\u63a5，\u51cf\u5c11\u7b49\u5f85
\n multi_accept on;
\n # \u5355\u8fdb\u7a0b\u6700\u591a2\u4e07\u8fde\u63a5，16\u6838\u603b\u5e76\u53d1\u224816\u4e07
\n worker_connections 20480;
\n # \u5173\u95ed\u201c\u60ca\u7fa4\u6548\u5e94\u201d，\u591a\u4e2a\u6838\u5904\u7406\u8fde\u63a5\u4e0d\u62a2\u6d3b
\n accept_mutex off;
\n # \u7a7a\u95f2\u8fde\u63a5\u5feb\u901f\u91ca\u653e，\u4e0d\u5360\u5751
\n accept_mutex_delay 500ms;
\n}<\/p>\n
# ===================== HTTP\u6a21\u5757（\u69a8\u5e7232G\u5185\u5b58） =====================
\nhttp {
\n include mime.types;
\n default_type application\/octet-stream;<\/p>\n
# \u96f6\u62f7\u8d1d：\u5185\u6838\u76f4\u63a5\u4f20\u6587\u4ef6，\u4e0d\u7528\u7ed5\u5f2f，\u7701CPU\/\u5185\u5b58
\n sendfile on;
\n # \u6279\u91cf\u53d1\u6570\u636e（\u7701\u5e26\u5bbd）+ \u5c0f\u6570\u636e\u5373\u65f6\u53d1（\u5feb\u54cd\u5e94），\u4e24\u4e0d\u8bef
\n tcp_nopush on;
\n tcp_nodelay on; <\/p>\n
# \u957f\u8fde\u63a5：60\u79d2\u6ca1\u52a8\u9759\u5c31\u56de\u6536，\u65e2\u590d\u7528\u8fde\u63a5\u53c8\u4e0d\u5360\u8d44\u6e90
\n keepalive_timeout 60;
\n # \u4e00\u4e2a\u8fde\u63a5\u6700\u591a\u5904\u74061\u4e07\u8bf7\u6c42\u5c31\u5173\u6389，\u9632\u6b62\u5185\u5b58\u6cc4\u6f0f
\n keepalive_requests 10000; <\/p>\n
# \u8d85\u65f6\u914d\u7f6e：\u522b\u8ba9\u65e0\u6548\u8fde\u63a5\u5360\u7740\u8305\u5751\u4e0d\u62c9\u5c4e
\n client_header_timeout 15s; # \u7b49\u8bf7\u6c42\u5934\u6700\u591a15\u79d2
\n client_body_timeout 15s; # \u7b49\u8bf7\u6c42\u4f53\u6700\u591a15\u79d2
\n send_timeout 60s; # \u53d1\u54cd\u5e94\u6700\u591a\u7b4960\u79d2<\/p>\n
# \u7f13\u51b2\u533a：\u752832G\u5185\u5b58\u5f53\u201c\u7f13\u5b58\u201d，\u5c11\u91cd\u590d\u8ba1\u7b97
\n client_body_buffer_size 128k;
\n client_header_buffer_size 16k;
\n large_client_header_buffers 4 64k;<\/p>\n
# Gzip\u538b\u7f29：16\u6838\u625b\u5f97\u4f4f5\u7ea7\u538b\u7f29，\u7701\u5e26\u5bbd\u53c8\u4e0d\u8d39CPU
\n gzip on;
\n gzip_comp_level 5;
\n gzip_types text\/plain text\/css application\/json application\/javascript image\/svg+xml;
\n gzip_min_length 1k; # \u5c0f\u4e8e1k\u7684\u6587\u4ef6\u4e0d\u538b，\u7701CPU
\n gzip_vary on; # \u544a\u8bc9\u5ba2\u6237\u7aef\u201c\u6211\u538b\u7f29\u4e86\u201d<\/p>\n
# \u53cd\u5411\u4ee3\u7406\u7f13\u51b2（\u5bf9\u63a5Java\/\u5176\u4ed6\u540e\u7aef\u65f6\u7528）
\n proxy_buffer_size 64k;
\n proxy_buffers 4 256k;
\n proxy_busy_buffers_size 512k;
\n proxy_connect_timeout 10s; # \u8fde\u540e\u7aef\u6700\u591a\u7b4910\u79d2
\n proxy_read_timeout 60s; # \u7b49\u540e\u7aef\u54cd\u5e94\u6700\u591a60\u79d2<\/p>\n
# \u9759\u6001\u8d44\u6e90\u914d\u7f6e（\u524d\u7aef\u6587\u4ef6\u76f4\u63a5\u8fd4\u56de）
\n server {
\n listen 80;
\n server_name localhost;
\n charset utf-8;<\/p>\n
location \/ {
\n root \/usr\/share\/nginx\/html;
\n index index.html index.htm;
\n }<\/p>\n
# \u9759\u6001\u6587\u4ef6\u8ba9\u5ba2\u6237\u7aef\u7f13\u5b587\u5929，\u5c11\u53d1\u8bf7\u6c42
\n location ~* \\\\.(css|js|jpg|png|gif|ico|svg)$ {
\n expires 7d;
\n add_header Cache-Control "public, max-age=604800";
\n }<\/p>\n
# 500\u9519\u8bef\u9875
\n error_page 500 502 503 504 \/50x.html;
\n location = \/50x.html {
\n root \/usr\/share\/nginx\/html;
\n }
\n }
\n}<\/p>\n
\u56db\u3001\u5fc5\u987b\u540c\u6b65\u6539！\u7cfb\u7edf\u7ea7\u914d\u7f6e（\u4e0d\u7136\u4f18\u5316\u767d\u505a）<\/h3>\n
Nginx\u914d\u7f6e\u518d\u725b，\u7cfb\u7edf\u9650\u5236\u6ca1\u6539\u4e5f\u6ca1\u7528，\u4e0b\u9762\u4e24\u6b65\u7167\u505a：<\/p>\n
1. \u6539\u5185\u6838\u53c2\u6570（\/etc\/sysctl.conf）<\/h4>\n
\u7f16\u8f91\u6587\u4ef6\u540e\u6267\u884csysctl -p\u751f\u6548：<\/p>\n
# \u76d1\u542c\u961f\u5217\u5927\u5c0f\u5339\u914d2\u4e07\u8fde\u63a5，\u907f\u514d\u8fde\u63a5\u6392\u961f\u6ea2\u51fa<\/span>
\nnet.core.somaxconn =<\/span> 20480<\/span>
\n# \u7f51\u5361\u63a5\u6536\u961f\u5217，\u9002\u914d16\u6838\u9ad8\u5e76\u53d1<\/span>
\nnet.core.netdev_max_backlog =<\/span> 20480<\/span>
\n# \u5e94\u5bf9\u7a81\u53d1\u8fde\u63a5，SYN\u961f\u5217\u653e\u5927<\/span>
\nnet.ipv4.tcp_max_syn_backlog =<\/span> 20480<\/span>
\n# \u590d\u7528TIME_WAIT\u8fde\u63a5，\u5c11\u5efa\u8fde\u7701CPU<\/span>
\nnet.ipv4.tcp_tw_reuse =<\/span> 1<\/span>
\n# \u7f29\u77ed\u8fde\u63a5\u91ca\u653e\u65f6\u95f4（\u9ed8\u8ba460\u79d2\u219215\u79d2）<\/span>
\nnet.ipv4.tcp_fin_timeout =<\/span> 15<\/span>
\n# \u53ef\u7528\u7aef\u53e3\u8303\u56f4\u653e\u5927，\u907f\u514d\u7aef\u53e3\u4e0d\u591f\u7528<\/span>
\nnet.ipv4.ip_local_port_range =<\/span> 1024<\/span> 65535<\/span><\/p>\n2. \u6539\u6587\u4ef6\u63cf\u8ff0\u7b26\u9650\u5236（\/etc\/security\/limits.conf）<\/h4>\n
# \u7ed9nginx\u548croot\u7528\u6237\u653e\u5f00\u6587\u4ef6\u63cf\u8ff0\u7b26\u9650\u5236（20\u4e07）<\/span>
\nnginx soft nofile 204800<\/span>
\nnginx hard nofile 204800<\/span>
\nroot soft nofile 204800<\/span>
\nroot hard nofile 204800<\/span><\/p>\n\u6539\u5b8c\u540e\u91cd\u542f\u670d\u52a1\u5668，\u6216\u8005\u6267\u884culimit -n 204800\u4e34\u65f6\u751f\u6548\u3002<\/p>\n
\u4e94\u3001\u8fdb\u9636\u95ee\u9898：2\u4e07\u8fde\u63a5\u80fd\u8c03\u66f4\u5927\u5417？<\/h3>\n
\u5f88\u591a\u4eba\u4f1a\u95ee：\u80fd\u4e0d\u80fd\u628aworker_connections\u4ece2\u4e07\u8c03\u52304\u4e07\u30016\u4e07？
\n\u7b54\u6848：\u80fd，\u4f46\u6709\u6761\u4ef6，\u4e14\u4e0d\u5efa\u8bae\u778e\u8c03！<\/p>\n
1. \u8c03\u5927\u7684\u201c\u5b89\u5168\u4e0a\u9650\u201d（16\u683832G）<\/h4>\n
\n\u8fde\u63a5\u6570\u5185\u5b58\u5360\u7528\u9002\u7528\u573a\u666f\u8981\u4e0d\u8981\u8c03？<\/tr>\n
\n\n| 2\u4e07（\u9ed8\u8ba4）<\/td>\n | 6.4G（\u536032G\u768420%）<\/td>\n | \u516c\u7f51\u6240\u6709\u573a\u666f<\/td>\n | \u63a8\u8350，\u7a33！<\/td>\n<\/tr>\n |
\n| 4\u4e07<\/td>\n | 12.8G（\u536040%）<\/td>\n | \u5185\u7f51\u9ad8\u9891\u77ed\u8bf7\u6c42（\u5982\u5fae\u670d\u52a1\u5bf9\u63a5）<\/td>\n | \u53ef\u9009，\u6027\u4ef7\u6bd4\u9ad8<\/td>\n<\/tr>\n |
\n| 6\u4e07<\/td>\n | 19.2G（\u536060%）<\/td>\n | \u51e0\u4e4e\u65e0\u573a\u666f<\/td>\n | \u4e0d\u63a8\u8350，\u5bb9\u6613\u5d29<\/td>\n<\/tr>\n |
\n| 8\u4e07<\/td>\n | 25.6G（\u536080%）<\/td>\n | \u7981\u6b62<\/td>\n | \u5fc5\u5d29，\u5185\u5b58\/CPU\u76f4\u63a5\u8fc7\u8f7d<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n2. \u8c03\u5927\u52304\u4e07\u7684\u524d\u63d0（\u7f3a\u4e00\u4e0d\u53ef）<\/h4>\n\n- \u6539worker_rlimit_nofile\u52305\u4e07（\u755920%\u4f59\u91cf）；<\/li>\n
- \u7cfb\u7edfulimit\u6539\u52305\u4e07；<\/li>\n
- \u5185\u6838\u53c2\u6570somaxconn\u7b49\u6539\u52304\u4e07；<\/li>\n
- \u4e1a\u52a1\u662f\u5185\u7f51\u56fa\u5b9a\u5ba2\u6237\u7aef（\u522b\u662f\u516c\u7f51\u96f6\u6563\u7528\u6237）\u3002<\/li>\n<\/ul>\n
3. \u4e3a\u5565\u4e0d\u5efa\u8bae\u8c036\u4e07\u4ee5\u4e0a？<\/h4>\n\n- \u6536\u76ca\u9012\u51cf：2\u4e07\u21924\u4e07，\u5e76\u53d1\u7ffb\u500d；4\u4e07\u21926\u4e07，\u5e76\u53d1\u53ea\u6da850%，\u4f46\u5185\u5b58\/CPU\u5f00\u9500\u7ffb\u500d；<\/li>\n
- \u7a33\u5b9a\u6027\u5dee：\u4e00\u70b9\u7a81\u53d1\u6d41\u91cf\u5c31\u4f1a\u6324\u7206\u5185\u5b58，\u89e6\u53d1OOM；<\/li>\n
- \u5185\u6838\u625b\u4e0d\u4f4f：Linux\u5904\u74066\u4e07\u8fde\u63a5\u65f6，\u7f51\u5361\/TCP\u4f1a\u5148\u74f6\u9888，\u5b9e\u9645\u80fd\u7528\u7684\u8fde\u63a5\u8fdc\u4e0d\u52306\u4e07\u3002<\/li>\n<\/ul>\n
\u516d\u3001\u66f4\u4f18\u65b9\u6848：\u6bd4\u8c03\u5927\u53c2\u6570\u9760\u8c31\u7684\u505a\u6cd5<\/h3>\n\u5982\u679c2\u4e07\u8fde\u63a5\u4e0d\u591f\u7528，\u522b\u6b7b\u78d5\u5355\u8282\u70b9：<\/p>\n - \u6269\u96c6\u7fa4：\u52a01\u53f016\u683832G\u670d\u52a1\u5668，\u90e8\u7f72\u76f8\u540cNginx，\u7528\u8d1f\u8f7d\u5747\u8861\u5206\u53d1\u6d41\u91cf（\u603b\u5e76\u53d1\u76f4\u63a5\u523032\u4e07，\u6bd4\u5355\u8282\u70b9\u8c034\u4e07\u7a3310\u500d）；<\/li>\n
- \u4f18\u5316\u8fde\u63a5\u590d\u7528：\u628akeepalive_requests\u4ece1\u4e07\u8c03\u52302\u4e07，\u6216\u628akeepalive_timeout\u4ece60\u79d2\u7f29\u523030\u79d2，\u8ba9\u73b0\u6709\u8fde\u63a5\u5904\u7406\u66f4\u591a\u8bf7\u6c42；<\/li>\n
- \u62c6\u5206\u4e1a\u52a1：\u9759\u6001\u8d44\u6e90\u548c\u53cd\u5411\u4ee3\u7406\u62c6\u6210\u4e24\u4e2aNginx\u5b9e\u4f8b，\u5404\u75282\u4e07\u8fde\u63a5，\u4e0d\u62a2\u8d44\u6e90\u3002<\/li>\n
\u4e03\u3001\u9a8c\u8bc1\u4f18\u5316\u6548\u679c：3\u4e2a\u7b80\u5355\u547d\u4ee4<\/h3>\n\u914d\u7f6e\u5b8c\u522b\u5149\u7b49，\u75283\u4e2a\u547d\u4ee4\u770b\u6548\u679c：<\/p>\n - nginx -t：\u9a8c\u8bc1\u914d\u7f6e\u6709\u6ca1\u6709\u8bed\u6cd5\u9519\u8bef；<\/li>\n
- top：\u770bCPU\u4f7f\u7528\u7387，16\u6838\u5e94\u8be5\u5747\u5300\u5360\u7528，\u6ca1\u6709\u67d0\u6838\u7206\u6ee1\/\u67d0\u6838\u95f2\u7f6e；<\/li>\n
- ss -s：\u770b\u8fde\u63a5\u6570，\u6b63\u5e38\u4e1a\u52a1\u4e0b\u4e0d\u4f1a\u9891\u7e41\u51fa\u73b0connection refused\u3002<\/li>\n
\u516b\u3001\u603b\u7ed3<\/h3>\n - 16\u683832G\u7684Nginx\u6838\u5fc3\u914d\u7f6e：auto\u8fdb\u7a0b\u6570+2\u4e07\u8fde\u63a5\u6570+20\u4e07\u6587\u4ef6\u63cf\u8ff0\u7b26，\u7a33\u625b16\u4e07\u5e76\u53d1；<\/li>\n
- \u7cfb\u7edf\u914d\u7f6e（\u5185\u6838+ulimit）\u5fc5\u987b\u540c\u6b65\u6539，\u4e0d\u7136\u4f18\u5316\u767d\u505a；<\/li>\n
- \u8fde\u63a5\u6570\u80fd\u8c03\u5927，\u4f46\u4f18\u5148\u6269\u96c6\u7fa4，\u522b\u778e\u8c03\u5355\u8282\u70b9\u53c2\u6570；<\/li>\n
- \u516c\u7f51\u573a\u666f\u522b\u65392\u4e07\u8fde\u63a5，\u5185\u7f51\u9ad8\u9891\u573a\u666f\u53ef\u8c28\u614e\u8c03\u52304\u4e07\u3002<\/li>\n
\u5982\u679c\u4f60\u7684\u4e1a\u52a1\u662f\u7eaf\u9759\u6001\u8d44\u6e90\u3001\u6216\u4e13\u95e8\u505a\u53cd\u5411\u4ee3\u7406，\u8bc4\u8bba\u533a\u8bf4\u4e00\u58f0，\u6211\u518d\u7ed9\u4f60\u9488\u5bf9\u6027\u5fae\u8c03\u914d\u7f6e~<\/p>\n","protected":false},"excerpt":{"rendered":" 16\u683832G\u670d\u52a1\u5668Nginx\u4f18\u5316\u5b9e\u6218：\u7a33\u625b16\u4e07\u5e76\u53d1，\u5c0f\u767d\u4e5f\u80fd\u770b\u61c2
\n\u4e00\u3001\u4e3a\u5565\u8981\u4f18\u5316？\u9ed8\u8ba4\u914d\u7f6e\u592a\u201c\u6d6a\u8d39\u201d
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