Re: [vwnc] Memory not shrinking (was debugging memory growth)

> Hi,
> I did some testing, using just a loop to allocate memory and see it
> growing.
> Now, what I see is that memory grows, and, if I do a Collect All
> Garbage, I have this result:
>
> Global garbage collection (please wait)...
> reclaimed 0 Mbytes of data and 0 OTEntries in 81.3 sec.
> 472.64 Mbytes total;    127.81 Mbytes used,    344.82 Mbytes free.
>
> So, my memory is not reclaimed back and released to the Operating
> System (windows).
>
> I was following memory reclaiming, and on
> MemoryPolicy>>shrinkMemoryIfRequired I can see that there are more
> than 300 Mb to be reclamed, so, #shrinkOldSpaceBy: is called, and
> then  #primShrinkOldSpaceBy:, but this latest, that is a primitive,
> return zero bytes reclaimed.
>
> I'm not so deep on memory policy question. Someone knows why memory
> get not released back  to the OS?.
>
> There is some parameter settings that avoid releasing back and I'm
> unaware of?
>
> thanks
>
> Giorgio
>
>
> On Tue, Jun 16, 2009 at 10:31 AM, giorgio ferraris
> <[hidden email] <mailto:[hidden email]>> wrote:
>
>     Hi,
>     thanks to all for the suggestions.
>     I try to see if I can find some light.
>     Ciao
>     Giorgio
>
>
>     On Tue, Jun 16, 2009 at 9:26 AM, Karsten <[hidden email]
>     <mailto:[hidden email]>> wrote:
>
>         Hi Giorgio,
>
>         what i've also found helpful in this area is the Class Report
>         from Advanced Tools. Sometimes you might just reference a lot
>         of objects in your image so that they don't get garbage collected.
>
>         Simply load All Advanced Tools from the Parcel Manager and go
>         to Tools->Advanced->Class reports in the Launcher. Then
>         right-click on the list of classes and select Add All. On the
>         right side of the window select space and run a class report
>         on the instance size. This will list all the objects that are
>         present in your image, maybe this helps you find a clue which
>         objects are still in your image.
>
>         Kind Regards
>         Karsten
>
>
>
>         giorgio ferraris wrote:
>>         Hi,
>>         I'm experiencing a similar situation, my memory grows from 70
>>         mb to 500 mb (looking at the memory usage on the  Windows
>>         Task Manager), and it grows almost instantaneously.
>>         The memory is never reclaimed back, but this is what I see on
>>         on the Windows Task Manager.
>>         If I look at the image, using both Memory Monitor and
>>         SystemAnalizer showSystemHistogram, I  don't see a big
>>         difference in Smalltalk memory between the state where
>>         TaskManager show an image of around 70 Mb and an when it
>>         shous one of around 500 Mb. SystemAnalizer
>>         showSystemHistogram just show a small grow, not a tenfold one!
>>         It's like if I'm allocating memory outside of the reaching of
>>         smalltalk itself!! (the growing seems connected to big select
>>         from DB, but the strange is, if I do select again and again,
>>         memory never grows more than that first burst of 500 mb. And
>>         this seems strange, I'm loading new data... )
>>         I'm Using VW 7.6 with Postgres exdi on windows.
>>
>>
>>         Any Idea on how trubleshooting this? Or where I missed the point?
>>
>>         Thanks a lot
>>         Giorgio
>>
>>
>>         On Fri, May 22, 2009 at 7:21 PM, Mike Hales
>>         <[hidden email] <mailto:[hidden email]>> wrote:
>>
>>             In my application, under certain circumstances I see slow
>>             memory growth of the image until eventually it runs out
>>             of memory and crashes. Does anyone have a good set of
>>             steps they use to troubleshoot this kind of problem? I
>>             don't know where to start looking for the cruft that is
>>             building up. Are there any good tools in the public store
>>             that help with this?
>>
>>             Thanks,
>>
>>             Mike
>>
>>             Mike Hales
>>             Engineering Manager
>>             KnowledgeScape
>>             www.kscape.com <http://www.kscape.com>
>>
>>             _______________________________________________
>>             vwnc mailing list
>>             [hidden email] <mailto:[hidden email]>
>>             http://lists.cs.uiuc.edu/mailman/listinfo/vwnc
>>
>>         SystemAnalyzer showSystemHistogram
>>         ------------------------------------------------------------------------
>>         _______________________________________________ vwnc mailing
>>         list [hidden email] <mailto:[hidden email]>
>>         http://lists.cs.uiuc.edu/mailman/listinfo/vwnc
>
>         --
>         Karsten Kusche - Dipl.Inf. - [hidden email]
>         <mailto:[hidden email]>
>         Tel: +49 3496 21 43 29
>         Georg Heeg eK - Köthen
>         Handelsregister: Amtsgericht Dortmund A 12812
>
>
>