I can't figure out why once or twice per week, my C# server application
throws OutOfMemoryExce ptions. There is plenty of memory in the machine. As
far as I can tell, when the exception is thrown, only 400 megs of 1gig total
is in use.
The exception is thrown while trying to update List<>. Here's a bit of the
stack trace:
===
System.OutOfMem oryException: Exception of type 'System.OutOfMe moryException'
was thrown.
at System.Collecti ons.Generic.Lis t`1.set_Capacit y(Int32 value)
at System.Collecti ons.Generic.Lis t`1.EnsureCapac ity(Int32 min)
at System.Collecti ons.Generic.Lis t`1.Add(T item)
at Mosaic.Core.Sta tUtils.ExtractR ORs(MiniPerfIte m[] perfItems, Int32
startIdx, Int32 endIdx, Boolean useNAOnNonPosBa l) in
C:\Development\ Mosaic\Mosaic-AM\Mosaic.Core. Shared\Code\Uti lities\Statisti cal\StatUtils.c s:line
38
===
I have a lot of small objects in memory at the time of the exception but I'm
nowhere close to exhausting available RAM. Any ideas?
16  22243 
Lamont Sanford <ya********@san ford.sonwrote:
I can't figure out why once or twice per week, my C# server application
throws OutOfMemoryExce ptions. There is plenty of memory in the machine. As
far as I can tell, when the exception is thrown, only 400 megs of 1gig total
is in use.
The exception is thrown while trying to update List<>. Here's a bit of the
stack trace:
===
System.OutOfMem oryException: Exception of type 'System.OutOfMe moryException'
was thrown.
at System.Collecti ons.Generic.Lis t`1.set_Capacit y(Int32 value)
at System.Collecti ons.Generic.Lis t`1.EnsureCapac ity(Int32 min)
at System.Collecti ons.Generic.Lis t`1.Add(T item)
at Mosaic.Core.Sta tUtils.ExtractR ORs(MiniPerfIte m[] perfItems, Int32
startIdx, Int32 endIdx, Boolean useNAOnNonPosBa l) in
C:\Development\ Mosaic\Mosaic-AM\Mosaic.Core. Shared\Code\Uti lities\Statisti cal\StatUtils.c s:line
38
===
I have a lot of small objects in memory at the time of the exception but I'm
nowhere close to exhausting available RAM. Any ideas?
Do you have any idea how big the list is at the point of failure?
--
Jon Skeet - <sk***@pobox.co m> http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too
Do you have any idea how big the list is at the point of failure?
>
At max it could get up to the tens of thousands, but certainly never over
100k...
OutOfMemoryExce ption really means "out of resources". Are you opening
files and not disposing them or something?
http://mrpmorris.blogspot.com/2006/1...maybe-not.html
Interesting. I'll check out the article.
No, I don't make use of files to any major extent, but I do use a lot of
database connections. Maybe I'm not closing them properly?
Most likely - improperly closed / disposed connection objects means you run
out of Connection Pool connections, which can cause exceptions similar to
what you're seeing - especially if combined with other code.
1) use the same connection string througout your app.
2) open a connection just before you need to do database call.
3) close the connection immediately after - this returns it to the pool
4) be very careful with DataReaders as they hold open a connection.
-- Peter
Recursion: see Recursion
site: http://www.eggheadcafe.com
unBlog: http://petesbloggerama.blogspot.com
BlogMetaFinder: http://www.blogmetafinder.com
"Lamont Sanford" wrote:
OutOfMemoryExce ption really means "out of resources". Are you opening
files and not disposing them or something?
http://mrpmorris.blogspot.com/2006/1...maybe-not.html
Interesting. I'll check out the article.
No, I don't make use of files to any major extent, but I do use a lot of
database connections. Maybe I'm not closing them properly?
Lamont Sanford <ya********@san ford.sonwrote:
Do you have any idea how big the list is at the point of failure?
At max it could get up to the tens of thousands, but certainly never over
100k...
That sounds unlikely to be the issue then.
Can I suggest that you use perfmon to look at both the heap and the
handle count of your process?
--
Jon Skeet - <sk***@pobox.co m> http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too
Lamont Sanford pisze:
I can't figure out why once or twice per week, my C# server application
throws OutOfMemoryExce ptions. There is plenty of memory in the machine. As
far as I can tell, when the exception is thrown, only 400 megs of 1gig total
is in use.
The exception is thrown while trying to update List<>. Here's a bit of the
stack trace:
===
System.OutOfMem oryException: Exception of type 'System.OutOfMe moryException'
was thrown.
at System.Collecti ons.Generic.Lis t`1.set_Capacit y(Int32 value)
at System.Collecti ons.Generic.Lis t`1.EnsureCapac ity(Int32 min)
at System.Collecti ons.Generic.Lis t`1.Add(T item)
at Mosaic.Core.Sta tUtils.ExtractR ORs(MiniPerfIte m[] perfItems, Int32
startIdx, Int32 endIdx, Boolean useNAOnNonPosBa l) in
C:\Development\ Mosaic\Mosaic-AM\Mosaic.Core. Shared\Code\Uti lities\Statisti cal\StatUtils.c s:line
38
===
I have a lot of small objects in memory at the time of the exception but I'm
nowhere close to exhausting available RAM. Any ideas?
Maybe due to extensively allocating and freeing memory, your memory is
too much fragmentized ?
Regards
>
That sounds unlikely to be the issue then.
Can I suggest that you use perfmon to look at both the heap and the
handle count of your process?
Sure, I'll check it out. I've never used permon before. What signs/symptoms
should I be looking for?
Maybe due to extensively allocating and freeing memory, your memory is
too much fragmentized ?
How would I go about defragmenting it? Should I manually run a garbage
collection? This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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I can't figure out why once or twice per week, my C# server application
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is in use.
The exception is thrown while trying to update List<>. Here's a bit of the
stack trace:
===
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