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CPU 16 cores 14 GB RAM Apache 2.2.16 PHP 5.3.3-7 with enabled APC

Apache mpm config:

StartServers 50 MinSpareServers 50 MaxSpareServers 256 MaxClients 256 MaxRequestsPerChild 0

With about 20-30 simultaneous connections apache requests take a lot of time, because CPU raised to 100%

mod_stat shows RANDOMLY apache processes and random scripts, that use more than 5% cpu

php applications worked greate with smaller hardware configuration and ths situation seems strange.

share|improve this question
So what? What should we say beside "that's life"? We can't look into your application remotely and say you have a problem in line 210 up to line 213. Or have a DNS server issue due to entering the wrong DNS forwarders. Or your kernel version is way too old. – mailq Oct 3 '11 at 18:04
I understand it. I only want to know, how i can trace it and localize the problem to solve it. – Vitaly Baev Oct 4 '11 at 5:11
possible duplicate of… and all the related question on that question. – mailq Oct 4 '11 at 14:57

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