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?

I think it's a DDoS attack.

I thought so, but even I suspended all domains it stil went on. And now I can not start httpd
Starting httpd: httpd: Syntax error on line 17 of /etc/httpd/conf/httpd.conf: Syntax error on line 1 of /etc/httpd/conf/extra/httpd-phpmodules.conf: Cannot load /usr/lib/apache/libphp5.so into server: libmysqlclient.so.15: cannot open shared object file: No such file or directory

I think I have to recompile cb, but I dont want to make things worse. Can someone tell me how to recompile without losing data

Recompile with this: