On Thu, 21 Oct 2010, Alain_Rastoul wrote:

> Hi Everybody,
> I have a standard squeak 4.1 with seaside 3.0 preloaded under Windows XP
> (seaside 3.0 rc OneClick Image) with FFI, ODBC packages installed and a very
> memory intensive application who load data from a MSSQL server and hash it
> into dictionaries.
> It is running in a process started at systemBackgroundPriority, and is
> launched with a MessageTally spyAllOn:.
> After running a few minutes it hangs up at full CPU, and I can't see what is
> going on, everything
> is hung (no Ctrl., no mouse)
> When I open the debug console and dump processes I see only few processes
> (MessageTally>spyEvery:on:,
> handleTimerEvent, userInterruptWatcher, lowSpaceWatcher) but no UI process
> and no app process.
> I tryed to put halts in code but it doesn't change anything.
> I noticed that it occurs when the memory usage is about 99% (I see it with a
> MemoryUsageMorph ticking),
> but not allways at the same time, it can load 10k, 20k or 30k rows before
> hanging.
> If I remove the MessageTally, it ran several times without hanging.
> I don't see any direct relation between MessageTally and hanging the VM
> (allocations / GC ?)
> I will try to generate and compile the vm with MSVC if I can (I can't test
> my app under linux)
>
> What is the way go with this kind of problem ?
> Any help, tip for debugging, advice, idea, remark (...) are welcome.
> Thanks in advance

I guess you're running out of memory. What's the memory usage of Squeak 
when the image hangs?


Levente

>
> Regards,
> Alain
>
>
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>