[Opensim-users] Intermittent crashing - System.OutofMemoryException

Tue Feb 14 13:09:17 UTC 2012

Thanks all for the info and thoughts, sounds like scheduling daily restarts
is probably the best option.

I'm pretty sure I haven't messed with whatever the default settings are for
the flotsam cache, I never copy over old config files when I upgrade, I go
through and update by hand and usually just base settings to make sure the
upgrade was successful and then turn on other options that we've tested.

I have to say, it's almost funny that FleepGrid, which is running Windows
XP on a P4 box that was gathering dust and cat hair in the basement, 4GB of
RAM, and at least 8 sims full of content and scripts isn't having that
problem, but the new poweredge server running WinServer2008, tons of RAM,
and only 3 or 4 sims of content is flaking out.  In fact, three of the
regions on the UCSIM grid are identical to the ones on FleepGrid since I
ported them over as OAR files, so it can't be much of a difference in
content..

Think I'll try going through the log files again, I'd sure like to know
what's tipping the out of memory exception!

Thanks again.

- Chris/Fleep

Chris M. Collins (SL/OS: Fleep Tuque)
Center for Simulations & Virtual Environments Research (UCSIM)
UCIT Instructional & Research Computing
University of Cincinnati
406A Zimmer Hall
315 College Drive
PO BOX 210088
Cincinnati, OH 45221-0088
chris.collins at uc.edu
(513) 556-3018

http://ucsim.uc.edu

On Tue, Feb 14, 2012 at 7:29 AM, James Stallings II <
james.stallings at gmail.com> wrote:

> Regardless the amount of RAM on your system, the .net runtime uses a
> memory model of a specific size (2 GB) and cannot address more than that
> except under special circumstances.
>
> There is a hack around, involving the use of a Visual Studio C++ utility
> to make a .net binary 'large memory aware', which will allow it to address
> 4 GB, but then only on operating systems that can address >2 GB (e.g., not
> 32 bit operating systems).
>
> Note that such measures will only help if the memory exhaustion is being
> caused by the amount/complexity of content. If the problem is truly a
> memory leak, this workaround will only prolong the inevitable, as it will
> simply provide more memory for the leaking.
>
> I saw this problem *very* briefly in the 0.7.3 series about a month ago. I
> never did have any indication of what was causing it, and it occurred day
> over day, without significant changes to the content. It went away just as
> fast as it came.
>
>
>
> FYI this is on a 25 region megaregion with >50k prims and at least several
> rather complex scripts in play.
>
>
> Cheers
> James/Hiro
>
>
> On Mon, Feb 13, 2012 at 8:39 PM, Gary Banham <banham1 at telus.net> wrote:
>
>> Fleep I’m running into exactly the same problem I check the flotsam cache
>> to make sure I wasn’t using memory ****
>>
>> My server runs windows seven but has the same amount of memory  I have
>> about 8 regions on the server some with quite a few scripts****
>>
>> I rolled back the instance to 7.1.1 to see what would happen and it
>> worked fine there must be something different in the way 7.2 release uses
>> the memory****
>>
>> I’m in the process of distributing the regions over a number of 7.2
>> instances I’m not sure if that’s going to cause other problems****
>>
>> ** **
>>
>> TC****
>>
>> Gary****
>>
>> ** **
>>
>> *From:* opensim-users-bounces at lists.berlios.de [mailto:
>> opensim-users-bounces at lists.berlios.de] *On Behalf Of *Fleep Tuque
>> *Sent:* February-13-12 11:06 AM
>> *To:* opensim-users at lists.berlios.de
>> *Subject:* [Opensim-users] Intermittent crashing -
>> System.OutofMemoryException****
>>
>> ** **
>>
>> Hi all,****
>>
>> ** **
>>
>> Our campus opensim system (running version 0.7.2 Release in grid mode)
>> seems to intermittently be crashing the last week or so and I can't figure
>> out why or how to reproduce it.  An out of memory exception doesn't make
>> sense to me, the server has 24GB RAM and has very light load since we're
>> still in pilot/testing phase.  No more than 5 or 6 users concurrent, only a
>> few sims with much content..  ****
>>
>> ** **
>>
>> Does this error mean anything to anyone?****
>>
>> ** **
>>
>> 012-02-11 18:18:33,738 ERROR - OpenSim.Application [APPLICATION]: ****
>>
>> APPLICATION EXCEPTION DETECTED: System.UnhandledExceptionEventArgs****
>>
>> ** **
>>
>> Exception: System.OutOfMemoryException: Exception of type
>> 'System.OutOfMemoryException' was thrown.****
>>
>>    at System.Threading.Thread.StartInternal(IPrincipal principal,
>> StackCrawlMark& stackMark)****
>>
>>    at System.Threading.Thread.Start()****
>>
>>    at Amib.Threading.SmartThreadPool.StartThreads(Int32 threadsCount)****
>>
>>    at Amib.Threading.SmartThreadPool.Enqueue(WorkItem workItem, Boolean
>> incrementWorkItems)****
>>
>>    at Amib.Threading.SmartThreadPool.QueueWorkItem(WorkItemCallback
>> callback, Object state)****
>>
>>    at OpenSim.Framework.Util.FireAndForget(WaitCallback callback, Object
>> obj)****
>>
>>    at
>> OpenSim.Region.ClientStack.LindenUDP.LLUDPServer.PacketReceived(UDPPacketBuffer
>> buffer)****
>>
>>    at OpenMetaverse.OpenSimUDPBase.AsyncEndReceive(IAsyncResult iar)****
>>
>>    at System.Net.LazyAsyncResult.Complete(IntPtr userToken)****
>>
>>    at System.Net.ContextAwareResult.CompleteCallback(Object state)****
>>
>>    at System.Threading.ExecutionContext.runTryCode(Object userData)****
>>
>>    at
>> System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode
>> code, CleanupCode backoutCode, Object userData)****
>>
>>    at System.Threading.ExecutionContext.RunInternal(ExecutionContext
>> executionContext, ContextCallback callback, Object state)****
>>
>>    at System.Threading.ExecutionContext.Run(ExecutionContext
>> executionContext, ContextCallback callback, Object state)****
>>
>>    at System.Net.ContextAwareResult.Complete(IntPtr userToken)****
>>
>>    at System.Net.LazyAsyncResult.ProtectedInvokeCallback(Object result,
>> IntPtr userToken)****
>>
>>    at
>> System.Net.Sockets.BaseOverlappedAsyncResult.CompletionPortCallback(UInt32
>> errorCode, UInt32 numBytes, NativeOverlapped* nativeOverlapped)****
>>
>>    at
>> System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32
>> errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP)****
>>
>> ** **
>>
>> Application is terminating: True****
>>
>> ** **
>>
>> Any pointers or advice appreciated!****
>>
>> ** **
>>
>> - Chris/Fleep****
>>
>> ** **
>>
>> Chris M. Collins (SL/OS: Fleep Tuque)****
>>
>> Center for Simulations & Virtual Environments Research (UCSIM)****
>>
>> UCIT Instructional & Research Computing****
>>
>> University of Cincinnati****
>>
>> 406A Zimmer Hall****
>>
>> 315 College Drive****
>>
>> PO BOX 210088****
>>
>> Cincinnati, OH 45221-0088****
>>
>> chris.collins at uc.edu****
>>
>> (513) 556-3018****
>>
>> ** **
>>
>> http://ucsim.uc.edu****
>>
>> _______________________________________________
>> Opensim-users mailing list
>> Opensim-users at lists.berlios.de
>> https://lists.berlios.de/mailman/listinfo/opensim-users
>>
>>
>
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