IIS 6.0 Application Pool recycles itself every few minutes
Posted on 2006-07-03
I'm running IIS 6.0 on Windows Server 2003 64 bit (dual processors, 2Gb RAM). Have just recompiled a .NET 1.1 site to .NET 2 and now the Application Pool for the site seems to randomly recycle itself.
The site is fairly busy, averaging 5 - 10 requests/sec for 20 hours a day. It makes extensive use of session variables to reduce DB server load and obviously when the pool gets recycled all session variables get lost.
What is very strange is that just before recycling, there is a HUGE spike in the Request/Sec and Sessions Active as reported by Performance Monitor - as in requests goes up to around 4295420459.
The server has the latest service patches and I have scanned for trojans and visruses and the server is clean.
Any ideas what I should look for?
Thanks a lot