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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>You can use Eclipse MAT<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Vijay<o:p></o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org]
<b>On Behalf Of </b>miguel machado<br>
<b>Sent:</b> Thursday, April 01, 2010 5:31 AM<br>
<b>To:</b> Rules Users List<br>
<b>Subject:</b> Re: [rules-users] drools expert: memory issues<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>Hi
there,</span><o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>Actually
that's a very good suggestion, i hadn't thought about that. Is there any heap
inspector tool you'd recommend? </span><o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>In
what comes to Wolfgang ideas, it makes sense what he said, but the truth is
making the knowledge builder a static variable actually made memory usage lower
(just a bit). I know it strikes as a surprise because one of the good practices
in java is to reduce the variable/object scope as much as possible :-/ I'll try
to investigate this further.</span><o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal><span style='font-family:"Verdana","sans-serif"'>About the kbase
serializing, i'll give it another try.</span><o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>thanks
for all support so far guys.</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>_
miguel</span><o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p>
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<p class=MsoNormal>2010/4/1 Jevon Wright <<a href="mailto:jevon@jevon.org">jevon@jevon.org</a>><o:p></o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>Hi Miguel,<br>
<br>
I assume that you've used a memory analyzer to find out conclusively that the
memory usage is by Drools, and not a memory leak?<br>
<br>
One way to do this is to limit the virtual memory to a small amount, add
-XX:+HeapDumpOnOutOfMemoryError to your environment, and then using Memory
Analyzer to analyse the dump.<br>
<br>
Cheers<br>
<span style='color:#888888'>Jevon</span><o:p></o:p></p>
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<p class=MsoNormal>On Wed, Mar 31, 2010 at 2:44 AM, Miguel Machado <<a
href="mailto:mls.machado@gmail.com" target="_blank">mls.machado@gmail.com</a>>
wrote:<o:p></o:p></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'>hi all,<br>
<br>
I'm quite new to the drools rule engine and i've been using it for a project
where i need to filter events and execute actions accordingly.<br>
<br>
I'm currently running a DRL file and creating a stateful session from it, and
then running 2/3 facts every time. Every X seconds I collect the available
facts and call fireAllRules() + dispose(), always within the same session. The
DRL file has circa 2160 rules declared (an external program is producing them),
and i'm using the "no-loop", "lock-on-active",
"activation-group" and "agenda-group" options on almost
every one.<br>
<br>
My main problem is that the software is consuming too much memory when it loads
the rules to the knowledge base variable, it reaches +300Mb which is just not
affordable in this project. Is there any way i can work around this? I've tried
setting some configuration properties but to no avail. What techniques may i
try in order to reduce memory load on drools startup? What would be the best
approach for dealing with so many rules?<br>
<br>
Anything would help, thanks in advance,<br>
<br>
_ miguel<br>
<br>
<o:p></o:p></p>
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<p class=MsoNormal>_______________________________________________<br>
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<br>
_______________________________________________<br>
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<br clear=all>
<br>
-- <br>
"To understand what is recursion you must first understand recursion"<o:p></o:p></p>
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