Re: [Mono-dev] Garbage Collection Issue?
On Thu, May 13, 2010 at 7:07 PM, Matt Dargavel m...@shout-telecoms.comwrote: Hi there, We have an application written in Mono that appears to be leaking memory. I’ve tried using the profiler and mprof-heap-viewer to identify any objects that are being left around, but I couldn’t see anything significant. The application doesn’t seem to leak on .NET, so I was starting to wonder about the Boehm GC. Will using the heap snapshots show any objects that are no longer being referenced, but have not been Garbage Collected? Also, is there a way to enable the heap profiler but only for heap snapshots using the telnet interface- i.e. without the allocations info as these generate huge amounts of data in a soak test. Finally, does anyone have any other suggestions on where else I should look / other diagnostics to try? I have experienced similar behavior. When app was running under .NET the memory was freed, but switching to Mono caused memory to climb up. I did some investigation but I couldn't find anything wrong with the code - I had tried all profilers available for mono. The I gave my app a little time and memory was eventually freed but after a longer period of time - maybe it's the same situation? -- Maciej Paszta ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Garbage Collection Issue?
This happened to me too, but I found the cause. It was a disposable object that I replaced with another one without disposing of it first. In my case, I found out doing the following gave the best results as far as memory is concerned: myobj.Dispose(); myobj = null; myobj = newobj; Without setting the object to null, memory is fred later. After that, Mono and .NET both used as much memory. Personally, every time I've had memory leaks, it was due to objects that implement IDisposable that weren't disposed. So far, I didn't really need to use a profiler, as I could find out exactly when memory wasn't released by simply using my application and watching memory usage. Maciej Paszta wrote: On Thu, May 13, 2010 at 7:07 PM, Matt Dargavel m...@shout-telecoms.comwrote: Hi there, We have an application written in Mono that appears to be leaking memory. I’ve tried using the profiler and mprof-heap-viewer to identify any objects that are being left around, but I couldn’t see anything significant. The application doesn’t seem to leak on .NET, so I was starting to wonder about the Boehm GC. Will using the heap snapshots show any objects that are no longer being referenced, but have not been Garbage Collected? Also, is there a way to enable the heap profiler but only for heap snapshots using the telnet interface- i.e. without the allocations info as these generate huge amounts of data in a soak test. Finally, does anyone have any other suggestions on where else I should look / other diagnostics to try? I have experienced similar behavior. When app was running under .NET the memory was freed, but switching to Mono caused memory to climb up. I did some investigation but I couldn't find anything wrong with the code - I had tried all profilers available for mono. The I gave my app a little time and memory was eventually freed but after a longer period of time - maybe it's the same situation? -- Maciej Paszta ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list -- View this message in context: http://mono.1490590.n4.nabble.com/Garbage-Collection-Issue-tp2197862p2216258.html Sent from the Mono - Dev mailing list archive at Nabble.com. ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
[Mono-dev] Garbage Collection Issue?
Hi there, We have an application written in Mono that appears to be leaking memory. I've tried using the profiler and mprof-heap-viewer to identify any objects that are being left around, but I couldn't see anything significant. The application doesn't seem to leak on .NET, so I was starting to wonder about the Boehm GC. Will using the heap snapshots show any objects that are no longer being referenced, but have not been Garbage Collected? Also, is there a way to enable the heap profiler but only for heap snapshots using the telnet interface- i.e. without the allocations info as these generate huge amounts of data in a soak test. Finally, does anyone have any other suggestions on where else I should look / other diagnostics to try? Thanks In Advance, Matt. ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Garbage Collection Issue?
On Thu, May 13, 2010 at 12:07 PM, Matt Dargavel m...@shout-telecoms.com wrote: Finally, does anyone have any other suggestions on where else I should look / other diagnostics to try? You might want to try heap-buddy, although it's been quite some time since I've been able to get it to compile. http://www.mono-project.com/HeapBuddy Bryan ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Garbage Collection Issue?
On Thu, May 13, 2010 at 2:59 PM, Bryan Murphy bmurphy1...@gmail.com wrote: On Thu, May 13, 2010 at 12:07 PM, Matt Dargavel m...@shout-telecoms.com wrote: Finally, does anyone have any other suggestions on where else I should look / other diagnostics to try? You might want to try heap-buddy, although it's been quite some time since I've been able to get it to compile. http://www.mono-project.com/HeapBuddy There's also heap-shot, which works fine with 2.6, as long as you use a SVN revision from around the time 2.6 was branched. Heap-shot can be used to snapshot the heap and examine the objects that are there, what objects they reference, and what objects reference them. It can also show the difference between heap snapshots. -- Michael Hutchinson http://mjhutchinson.com ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
