php-cgi using a lot of memory

Hi,

Today all of a sudden php-cgi started to use a lot of source and system load average went up like 50

So I stopped the services and uptadet everything

I also updated from php 5.3 to 5.4

But nothing changed, I cant even log in to VPS if I dont stop the httpd service

I use centos 5 and custombuild 1.2

What should I do?

php-cgi using a lot of memory