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、
應該是500的uid 被系統的其他使用者佔用了吧，你刪除此使用者即可
你截取的日誌中的表現看是apache 申請臨時資源時的權限不能切換到uid是500的用戶上，導致資源申請失敗，這些日誌還不能確定是否是導致apache掛掉的真正原因，可能還要多看一些日誌
轉一篇日誌http://weifly.iteye.com/blog/1259907，不知道有沒有幫助