Any memory exception is almost certainly genuine. The first questions that
come to mind are
1) Are you running the memory cache component of the Flotsam cache? The default settings are to use a disk-cache only -
this appears fast enough for OpenSim and the memory cache has caused problems in the past.
If you're using fairly clean OpenSim configs this should already be happening. However, if you've carried through older
config files these may still use in-memory settings.
2) Another possibility is scripts and whether these are created/removed extensively on your system and how many there
are. I just added some more info to the performance page at [1] about the effects of various settings.
Failing this, I recommend either restarting your OpenSimulator instance once per day (quite frankly this is sometimes
the easiest way to deal with memory leaks) or put in some infrastructure to do monitoring of opensim and the wider
system to find out when this is happening and what it correlates with it.
On 13/02/12 18:06, Fleep Tuque wrote:
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
[email protected] <mailto:[email protected]>
(513) 556-3018
http://ucsim.uc.edu
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--
Justin Clark-Casey (justincc)
http://justincc.org/blog
http://twitter.com/justincc
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