Re: [Dsol-java] Heap Memory Problem

[N. L. <nl...@rs...>]

Dear Fransisco,

memory leaks are notoriously hard to identify. What usually works for me
is to use an object scanner, which identifies the number and types of
active objects. A free one is available at
http://jb2works.com/refscan/start.html
>From my experience, these bugs are often due to:
- unremoved event listener connections
- unexpected connections via GUI objects (e.g. via 'Action' objects in
the menu, or non garbage collected windows)
Hope this helps.

Kind regards,

Niels Lang

---------------------------------------------------------
ir. Niels Lang, Ph.D. candidate
Dep. Decision & Information Sciences
Rotterdam School of Management
Erasmus University Rotterdam
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-----Original Message-----
From: dso...@li...
[mailto:dso...@li...] On Behalf Of Francisco
Hederra
Sent: 15 September 2006 14:48
To: dso...@li...
Subject: [Dsol-java] Heap Memory Problem

Hi Everyone,

I am having problems with Heap Memory when I run a long number of
replications (> 500). I know this is a problem between my model and the
java garbage collector (gc).

I have tried:
a) Using finalize methods to check whther objects were cleaned, but I
removed them since the gc() postpone cleaning up objects with finalizing
methods.
b) On every class I made every possible field final and every possible
method parameter final as well
c) At the end of every replication I removed all listening objects from
their EventProducer. I also make null every field that is not final.

After all this done, my model still uses more and more memory after each
replication up to the point where there is no more Heap Memoryy
available
and stops.

Anybody has a tip on how to expedite memory collection or issues that
might reduce the change in allocated memory after each replication ?


Francisco



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