我有几个 nginx Web 服务器作为反向代理。
我发现一些服务器（不是全部）中的活动连接（包括读取写入和等待，从 http_stub_status 模块看到）不断从 3000 增长到 5000、10000 .... 10k ... 50k，并且即使在深夜也不会减少。
同时，我从netstat得到了一个更可靠的号码
netstat -nap | grep 80 | grep EST | wc -l
2743
keepalive_timeout 为 10 秒
工作进程都同时启动
5265 nginx: master process 6-19:18:55 May19
24498 \_ nginx: worker process 59:34 19:16
24499 \_ nginx: worker process 59:34 19:16
24500 \_ nginx: worker process 59:34 19:16
24501 \_ nginx: worker process 59:34 19:16
24502 \_ nginx: cache manager pr 59:34 19:16
我在以下位置发现了类似的问题：
但似乎和我不一样
error.log 中没有相关错误
该系统是
cat /etc/issue
CentOS release 5.3 (Final)
Kernel \r on an \m
uname -a
Linux 2.6.18-128.el5xen #1 SMP Wed Jan 21 11:12:42 EST 2009 x86_64 x86_64 x86_64 GNU/Linux
nginx版本：
nginx -V
nginx version: Nginx/1.0.14
built by gcc 4.1.2 20080704 (Red Hat 4.1.2-44)
TLS SNI support disabled
configure arguments: --prefix=/home/web/nginx/ --user=nobody --group=nobody
--with- http_ssl_module --with-http_sub_module --with-http_dav_module
--with-http_flv_module -- with-http_gzip_static_module
--with-http_stub_status_module --http-proxy-temp-path=/home/web/nginx/data/proxy
--http-fastcgi-temp-path=/home/web/nginx/data/fastcgi
--http-client-body-temp-path=/home/web/nginx/data/client --with-pcre=../pcre-7.9
--add-module=../ngx_http_upstream_keepalive-d7643c291ef0
--add-module=../hmux/ --add-module=../nginx-sticky-module-1.0/
--with-google_perftools_module --add-module=../nginx_upstream_check_module-660183a
这些模块是：
1: for cookie sticky
nginx-sticky-module.googlecode.com
2: hmux module for resin
code.google.com/p/nginx-hmux-module/
3: upstream check module
github.com/yaoweibin/nginx_upstream_check_module
4: upstream keepalive
mdounin.ru/hg/ngx_http_upstream_keepalive/
所有补丁都应用于 nginx src 代码。
nginx.conf：
user nobody;
worker_processes 4;
worker_cpu_affinity 0001 0010 0100 1000;
google_perftools_profiles /home/web/nginx/tcmalloc/tc;
events {
worker_connections 51200;
use epoll;
epoll_events 4096;
multi_accept on;
accept_mutex off; }
http {
include mime.types;
default_type application/octet-stream;
log_format main '$remote_addr - $remote_user [$time_local] '
'$status $body_bytes_sent ';
access_log logs/access.log main;
sendfile on;
keepalive_timeout 10;
server_tokens off;
gzip on;
gzip_types text/plain text/css application/x-javascript text/xml application/json application/xml application/xml+rss text/javascript;
gzip_vary on;
server_names_hash_max_size 4096;
proxy_buffer_size 64k;
proxy_buffers 8 64k;
proxy_busy_buffers_size 64k;
client_header_buffer_size 64k;
large_client_header_buffers 4 64k;
proxy_headers_hash_max_size 1024;
proxy_headers_hash_bucket_size 128;
client_max_body_size 25m;
upstream backend{
check interval=5000 fall=3 rise=2 timeout=2000 default_down=false type=tcp;
keepalive 1024;
server server1:80;
server server2:80;
}
server {
listen 80;
server_name xxx;
location / {
proxy_pass http://backend;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
}
}