李海鑫个人博客

本文HTML永久地址doc

刚才测试了一下nginx并发链接数，在同时在线人数为 2000的时候，不能访问网页，出现500 Internal Server Error，查看了一下日志/var/log/nginx/error.log

[root@lxadmin nginx]# tail -n 30 error.log
2008/11/06 21:19:46 [alert] 1110#0: accept() failed (24: Too many open files) while accepting new     connection on 0.0.0.0:80
2008/11/06 21:19:46 [alert] 1110#0: accept() failed (24: Too many open files) while accepting new     connection on 0.0.0.0:80
2008/11/06 21:19:46 [alert] 1110#0: accept() failed (24: Too many open files) while accepting new connection on 0.0.0.0:80
2008/11/06 21:19:46 [alert] 1110#0: accept() failed (24: Too many open files) while accepting new     connection on 0.0.0.0:80
2008/11/06 21:19:46 [alert] 1110#0: accept() failed (24: Too many open files) while accepting new     connection on 0.0.0.0:80
2008/11/06 21:19:46 [alert] 1110#0: accept() failed (24: Too many open files) while accepting new connection on 0.0.0.0:80
2008/11/06 21:19:46 [alert] 1110#0: accept() failed (24: Too many open files) while accepting new connection on 0.0.0.0:80

看来是模拟的并发数太多了，需要调整一下nginx.conf的并发设置数，（我的配置主机的内存 128M,CPU为1G,）

vi /etc/nginx/nginx.conf
events {
    worker_connections  1024;
}

调整为

events {
    worker_connections  10240;
}

还是会出现上面问题，使用

[root@lxadmin nginx]# cat /proc/sys/fs/file-max
8192

文件系统最大可打开文件数

[root@lxadmin nginx]# ulimit -n
1024

程序限制只能打开1024个文件

使用[root@lxadmin nginx]# ulimit -n 8192调整一下
或者永久调整打开文件数 可在启动文件/etc/rc.d/rc.local末尾添加（在/etc/sysctl.conf末尾添加fs.file-max=xxx无效）

ulimit -n 8192