Very large server load all of a sudden

[rolo@]

Hi, my server started coming to a halt yesterday and I noticed that it was due to very high server load. I'm not very proficient in Linux so maybe someone can help me out.

I took a screenshot of the "top" command (ordered by most processor used first). See attachment.

This httpd behavior seems very strange to me. How can I look deeper into this?

Regards,
Rolo


[edit]
PS: Here's a link to the screenshot in case the forum attachment dissappears for some reason: http://img89.imageshack.us/img89/520/serverloadlt2.png
[/edit]