Look who is reserving large amount of virtual memory on 64 bit: It is . Net GC heaps

On 64 bit window 2003/2008 servers as soon as you give any .Net (.aspx) resource requests you would notice w3wp.exe taking large amount of memory in form of Virtual bytes.

Looking in task manager we would notice W3wp.exe Process/Commit size: 380 MB

Whereas looking into perfmon virtual bytes counter or  in IIS 7 => Worker Processes.We would notice approx. 5.5 GB as virtual bytes occupied by w3wp.exe


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Comments (2)

  1. Nuno Pereira says:


    I've seen this on several servers. What does this mean? Is the process realy using 5,5GB of memory? Is this a memory leak in our application?


    Nuno Pereira

  2. jaskis says:


    No that does not mean it is memory leak . Read the linked article for complete details

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