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So there is a VPS with openvz virtualization, with debian 6.0 32 bit The problem is appearing approx. 1 week ago. The automatic security monitoring system is shutting down the vps that i'm running due to cpu overload! I am linking the /etc/apache2/apache2.conf

If you could help somehow without access then thank's in advance! If you need more files then please ask and i will try to post them!

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show us output of netstat -patn while high CPU usage will be observed. Also a top output would be useful. Are you using X of some sort? like gnome or KDE or is it only console accessed server? What kind of hardware do you have? CPU / RAM – mnmnc Aug 23 '12 at 16:04
it is only console access 1 vcpu 2GHZ 2GB RAM 25GB SSD – rsz Aug 23 '12 at 16:09
ok. if you type in the console top you will see column CPU% it will show you the usage percentage per process that particular process is using. show us top 10 or top 15 of those processes. – mnmnc Aug 23 '12 at 16:14
okay i am waiting until the cpu is on 100% – rsz Aug 23 '12 at 16:21
80 will be totaly enough. – mnmnc Aug 23 '12 at 16:22

Change the config by limiting possible clients and threads:

ThreadLimit          40
MaxClients           40

If it will help - OK. If not - cut it more.

I can see in netstat output that a lot of connections are originated from one IP address. This might mean that your site is poorly constructed - for example lots of iframes - each one of them will generate a thread on your side. You might want to redesign the site. Also check how big is your site and if you got a lot of pictures in hight definition and so on... Think about free cloud cache services like it might free your CPU a bit.

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okay will try and if worked I will accept the answer, thanks for now! – rsz Aug 23 '12 at 16:58
remember to run apache2ctl restart after changes. – mnmnc Aug 23 '12 at 17:00

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