Hi,

We have a .Net 2.0 Web Services Application running on Windows 2003
Server SP. There is one application pool that contains 10 copies of
this application (there is one copy per customer that we have).

When all the applications are loaded, the "private bytes" for the
process is around 400MB and the "# Bytes in all heaps" is around
250MB.

I'm trying to understand what is loaded in the private bytes. As far
as I understand, the private bytes include the assemblies themselves
as well as any unmanaged objects (i.e.: COM Objects). Is that right?

The \bin directory of my web application contains 13MB of DLL files.
Can I make this simplistic calculation: 13 MB X 10 Applications = 130
MB. Therefore 130MB of the private bytes would be allocated to hold
the assemblies themselves?

How can I find out what exactly is in the private bytes? Is there a
tool I can use to find out? I have a memory dump and I have WinDbg. I
know how to inspect managed memory using SOS Extension commands but I
don't know how to to inspect non managed memory. Is WinDbg the right
tool?

Thanks

-Sly

Much of each DLL (any readonly segments) should be shared, and not appear in
private bytes at all.

As the name says, the Private Bytes counter indicates the amount of memory
being used that can't be shared with other processes. It contains caches,
buffers, CLR heaps etc. Everything allocated (committed) by the process for
itself.

Some good links for more details.

http://blogs.msdn.com/tess/archive/2...ak-memory.aspx
http://msdn.microsoft.com/msdntv/tra...ranscript.aspx
http://msdn.microsoft.com/msdnmag/is...t/default.aspx

<redhotsly (AT) hotmail (DOT) com> ha scritto nel messaggio
news:1174068100.473717.244640 (AT) n59g2000hsh (DOT) googlegroups.com...

On Mar 16, 3:16 pm, "Ben Voigt" <r... (AT) nospam (DOT) nospam> wrote:

Hi Ben,

I was able to calculate the amount of memory used by the assemblies.
WngDBg has the "lm" command that lists modules and prints the start
and end address of each module. With 10 application domain loaded I
had a total of 150 MB of DLLS. System DLLs and DLLs that are in the
GAC are loaded only once but my application's assemblies are loaded 10
times. BTW, most of the 150 MB is loaded with system and GAC dlls.

Sly