centos 6.3 64bit
cpu 双核
7.5G内存
php 5.3
apache 2
StartServers 20
MinSpareServers 20
MaxSpareServers 60
ServerLimit 10000
MaxClients 5000
MaxRequestsPerChild 1000
谷歌分析显示平时同时在线500到1200、晚上人最多。
日志：
[Wed Jun 25 20:40:35 2014] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 500
[Wed Jun 25 20:40:35 2014] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 500
[Wed Jun 25 20:40:35 2014] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 500
[Wed Jun 25 20:40:35 2014] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 500
[Wed Jun 25 20:40:35 2014] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 500
[Wed Jun 25 20:40:35 2014] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 500
[Wed Jun 25 20:40:35 2014] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 500
[Wed Jun 25 20:40:35 2014] [alert] Child 25763 returned a Fatal error... Apache is exiting!
[Wed Jun 25 20:40:35 2014] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 500
[Wed Jun 25 20:40:35 2014] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 500
这可能是啥问题、、、apache配置呢合理么？求教、
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
The uid of 500 should be occupied by other users of the system. You can delete this user
The performance in the logs you intercepted seems to be that the permissions of apache when applying for temporary resources cannot be switched to the user with uid 500, causing the resource application to fail. These logs cannot yet determine whether it is the real reason for apache to hang up. It may be I need to read more logs
Reprint a blog post http://weifly.iteye.com/blog/1259907, I don’t know if it will be helpful