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Memory issue with COM+ .NET Managed Component

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Jon Snow

I have a component that I've writen in C# that does a lot of disk
reading and processing. What I'm noticing is that when I have the DLL
as a part of a console test app, my memory usage stays rock solid.
It'll jump to about 58MB of RAM after processing 750MB of files off
the disk. When I plug the same DLL into COM+, I'm noticing that my
RAM usage goes up with every read and is never being freed. For the
same number of MB read from disk, my RAM usage runs up to a gigabyte.
I've profiled the test console application in .NET Memory Profile, and
it looks like I'm doing a very clean job of disposing of my objects
(most everything implements the IDisposable interface). So I'm not
sure what the problem is. Any suggestions?

Thanks,

Jon

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Marcelo Dabanovich Lavio

Hi, Jon...

I also had too much memory being used by a COM+ app, but it had queued
components in it, and was not doing disk IO by itself, but it was doing it
under the covers through MSMQ.

My thought is that my problem may be related, in someway, to what is
described here:
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q312118

I think that, maybe, it can be your case, also...

This may sound stupid, but try to add some calls to System.GC.Collect() in
the middle of your processing... This solved my problem, but I'm not sure
why. Maybe it's because when worker(s) thread(s) is(are) blocked(s) in calls
to Collect(), the finalizer thread described in the article is abled to run
and finish it's work.

Hope this helps,
Marcelo

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	System.GC
	System.IDisposable

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