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POOutOfMemoryException - out of ideas
 

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    <p>I know there is no simple answer to my question but I would appreciate ideas, guides or some sort of things-to-look-at list</p> <p>I have a net Windows service that is constantly throwing OutOfMemoryException. The service has two builds for x86 and x64 Windows. However on x64 it consumes a lot more memory. I have tried profiling it with various memory profilers. But I cannot get a clue what the problem is. The diagnosis - service consumes lot of VMSize and crashes app after 3 to 12 hours. The behaviuor is rather stochastic - there is no observable pattern for crash scenario.</p> <p>Also I tried to look at performance counters (perfmon.exe). What I can see is that heap size is growing and %GC time is on average 19%. Plus memory allocation is correlated with %CPU time.</p> <p>My application has threads and locking objects, DB connections and WCF interface. The general question that I am trying to solve:</p> <blockquote> <p>Is it simply GC not been fast enough to GC objects or some non-managed (windows) objects are consuming memory?</p> </blockquote> <p>See first app in list <a href="http://s45.radikal.ru/i109/1003/af/92a389d189e8.jpg" rel="nofollow noreferrer">http://s45.radikal.ru/i109/1003/af/92a389d189e8.jpg http://s45.radikal.ru/i109/1003/af/92a389d189e8.jpg</a></p> <p>The link to picture with performance counters view <a href="http://s006.radikal.ru/i215/1003/0b/ddb3d6c80809.jpg" rel="nofollow noreferrer">http://s006.radikal.ru/i215/1003/0b/ddb3d6c80809.jpg</a></p>
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    1. COLooks to me you have some objects which are not releases (memory leak), or your CPU is working so much that the framework decides not to run the garbage collector. Also check out Latency Modes for the garbage collector at MSDN - http://msdn.microsoft.com/en-us/library/bb384202.aspx. Which memory profiler have you used so far?
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      1. USMikael Svenson
    2. COAre you querying a lot of data from the database?
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    3. COHi Mikael, I've tried dotTrace and Ants. They crash too (sometimes) Will have a look at links you provided.
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