Possible to track server load per domain?

[dennysp]

Hi guys,
My server's load recently has been getting hit pretty hard. I would like to know if there is a way to see which domain is causing the extra load. I'm able to see a bunch of httpd and mysqld services running, and the IO wait on the server is almost always 100% when the hits appear. Is there some sort of tool that would allow this?

Thanks in advance.
-d