Sorry about the erratic web server behavior today.
Most of my 24/7 computerized services all run off of one machine. The machine runs Windows XP Media Center 2005 and has Virtual Machines for my email and web services. Since it is my everything computer I normally don't pay attention with what I do with it, but today I started a video conversion job today which took 12 hours or more. A few hours ago I noticed that the web server started to reject people with a web server busy message.
The disk queue length grew large enough that all the services running on the machine started having problems.
In the future if I start another video encoding job I'll be sure to adjust the process priority such that I won't have to worry about it again.