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Closed 11 years ago.

I have a website which prepared with ASP.NET MVC 3 and Entity Framework 4.1. This image below is my server s perfmon logs.

My problem is w3wp.exe is getting bigger and bigger at every minutes and never release. I m using LINQ to Entities in my queries and all my entity framework codes are in using block.

I think it s a garbage collection problem, but I am not sure. What is my problem and how can I fix it?

Perfmon Logs image about my issue

Answer 1

It all depends on what your web site is doing. We have .NET servers running on 32 GB RAM, and the worker process gladly takes all it wants. It needs it really.

Are you running a lot of background threads, stored an abhorrent amount of data in the session/global application / static methods?

Are connection strings, readers, file I/O, etc. being closed properly?

.NET garbage collection works great, but you have to do your part. Garbage collectors (waste disposal engineers) are not going to go into your house and collect it for you, you have to at least walk it to the curb... or close / null / dispose of objects you re not using.

Update 1:

What is happening is the ASP.NET worker process is creating a buffer. When it hits a certain amount of memory used, it will decrease over time, but it likes to allocate memory so it doesn t have to go out of it s way to fetch it when it needs it.

Answer 2

You should run a profiler to see what process and threads are getting out of hand. Visual Studio 2010 has some nice profiling tools, and I m sure there are some other third-party ones as well.

It very well could be poor coding from the developer, and garbage collection might not be doing its role as Ryan mentioned above. Especially if your application uses multiple threads.

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