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.NET Forum / .NET Framework / Performance / June 2006Out Of memory Exception
Hi, Our application is a windows service (remoting) .net v1.1. We are trying to serialize the data table to send it across the wire to the clients. We are using data table surrogate to send it across the wire. The problem we are facing is that when the service comes up there could be more than 50 clients that could request for the snap shot of tables. During this process the objects are allocated in the Large Object Heap and Gen 2 Segment by the surrogate and the binaryformmater that we use to compress the data size. Due to heavy load the memory is really fragmented. And this leads to Out Of Memory Exception. Does any body have any suggestions to address this? interesting problem, do you have a dedicated server for this? what are your gc cycles like? seems to me that gc is not getting collected quickly enough - suspicion is that the code may be hanging on to some roots after the compression process is complete.  Signature________________________ Warm regards, Alvin Bruney [MVP ASP.NET] [Shameless Author plug] Professional VSTO.NET - Wrox/Wiley The O.W.C. Black Book with .NET www.lulu.com/owc, Amazon Blog: http://www.msmvps.com/blogs/alvin ------------------------------------------------------- > Hi, > Our application is a windows service (remoting) .net v1.1. We are trying [quoted text clipped - 13 lines] > > Does any body have any suggestions to address this? Hi, I checked out the roots but there aren’t any roots to the objects. The whole issue is that the all the objects are getting primarily allocated in the LOH and GC collections aren’t happening. I think the whole issue is that the short lived objects are getting allocated in the LOH. I wish the binary formatter had method that gives the size memory stream that is required to convert the object. If there was a method then we could have implemented a pre allocated buffer pool which could have been reused (that would avoid temporary LOH objects). If I would have to throw GC.Collect I don’t see OOM, which I don’t want do. Naveen > interesting problem, do you have a dedicated server for this? what are your > gc cycles like? seems to me that gc is not getting collected quickly [quoted text clipped - 18 lines] > > > > Does any body have any suggestions to address this? Hi, When you are seeing the OOM's get thrown what are the values for your processe's Private Bytes, Virtual Bytes, and Bytes in all Heap perf counters? Thanks, Dan This posting is provided "AS IS" with no warranties, and confers no rights. You assume all risk for your use. © 2002 Microsoft Corporation. All rights reserved. Use of included script samples are subject to the terms specified at http://www.microsoft.com/info/cpyright.htm Please reply to the newsgroups only. I had once a simular problem I wrote cataloging software and in some situations i could have 250 clients to my server object i solved this by using a singleton object this also gave me the ability to implement a caching mechanism so clients could be served more quickly regards Michel Posseth [MCP] > Hi, > Our application is a windows service (remoting) .net v1.1. We are trying [quoted text clipped - 13 lines] > > Does any body have any suggestions to address this? Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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