Помогите разобраться, сервак работал почти год без перебоев но последнии два дня начал слетать через каждые два-четыре часа. Вот логи.

[Tue Sep 14 14:01:40 2010] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 48

[Tue Sep 14 14:01:40 2010] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 48

[Tue Sep 14 14:01:40 2010] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 48

[Tue Sep 14 14:01:40 2010] [alert] Child 20947 returned a Fatal error... Apache is exiting!

[Tue Sep 14 14:01:40 2010] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 48

[Tue Sep 14 14:01:40 2010] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 48

[Tue Sep 14 14:01:40 2010] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 48

[Tue Sep 14 14:01:40 2010] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 48

[Tue Sep 14 14:01:40 2010] [emerg] (22)Invalid argument: couldn't grab the accept mutex

[Tue Sep 14 14:01:44 2010] [emerg] (22)Invalid argument: couldn't grab the accept mutex

[Tue Sep 14 14:01:44 2010] [emerg] (22)Invalid argument: couldn't grab the accept mutex

[Tue Sep 14 14:01:45 2010] [emerg] (22)Invalid argument: couldn't grab the accept mutex

[Tue Sep 14 14:02:25 2010] [emerg] (22)Invalid argument: couldn't grab the accept mutex

[Tue Sep 14 14:02:43 2010] [emerg] (22)Invalid argument: couldn't grab the accept mutex

Что с этим можно сделать?