RE: What is the limit for memory a .NET process or AppDomain can use?
- From: jetan@xxxxxxxxxxxxxxxxxxxx ("Jeffrey Tan[MSFT]")
- Date: Thu, 05 Jun 2008 05:38:54 GMT
Hi Max,
..Net AppDomain or Process does not have hard-coded memory limit in
principle. So the memory limit normally lies with the underlying OS memory
manager limitation. As Arne pointed out, the modern OS uses the virtual
memory management, so all the memory usage comes from the virtual memory
space instead of physical memory. For 32bit OS, 2^32 bytes(4GB) are
available to a process. However, since the OS kernel normally uses 2GB
virtual space. There are only 2GB left for the process user-mode code. So
we may believe that the memory limit for a .Net process/AppDomain is 2GB.
Can you tell me why you want to know of the memory limitation for .Net
process/AppDomain? In .Net world, the memory is abstracted as managed
objects. The .Net developers seldom touch or deal with memory directly
unless you are using unsafe code or p/invoke COM interop. Also, in the CLR,
the .Net GC is responsible for us to free the managed objects memory and
return to managed heap.
Do you allocate memory directly for native code? If we can understand your
purpose and problem context better, we may have a better solution. Thanks.
Best regards,
Jeffrey Tan
Microsoft Online Community Support
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