SQL Server Requests Time Out As TempGetStateItemExclusive Getting Called Continuously

Jan 28, 2010

I run a site with decent traffic (~100,000 page views per day) and sporadically the site has been brought to its knees due to SQL Server timeout errors.When I run SQL Profiler, I see a command getting called hundreds of times a second like this:

exec dbo.TempGetStateItemExclusive3 @id=N'ilooyuja4bnzodienj3idpni4ed2081b',...

We use SQL Server to store ASP.NET session state. The above is the stored procedure called to grab the session state for a given session. It seems to be looping, asking for the same 2 or 3 sessions over and over. I found a promising looking hot fix that seems to address this exact situation, but it doesn't seem to have solved the problem for us. (I'm assuming this hotfix is included in the most recent .NET service pack, because it doesn't look like you can install it directly anymore). I added that registry key manually, but we still see the looping stored procedure calls like above (requesting the same session much more often than every 500ms) I haven't been able to recreate this on a development machine. When two requests are made for the same session ID, it seems to block correctly, and even try to hit SQL until the first page releases the session.

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