Lot of /usr/bin/php5-cgi process

[Fumble]

Hi all,

I'm working on server not installed by myself. And I got an issue on that one.

This machine is a VM (2 CPU, 6 Go of Memory) with a Debian GNU/Linux 5.0.

And I got a lot of crash with it.

It seems that it runs out of available process.

When I check the machine, I got an huge number (around 1000 and more every hour) of /usr/bin/php5-cgi process, running under different virtual user...
They disappear if I reload apache...

I have seen some people running almost the same problem but no solutions...

Can someone help?

Do not hesitate to let me know if you need more information.