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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>So here Is a question then. <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'>If I create 2 rulebases with 2 different rules, does that consume
more permGen space than 1 rulebase with the same 2 rules?<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'>Thanks<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Barry<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'><o:p> </o:p></span></p>
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color:#1F497D'><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>Edson Tirelli<br>
<b>Sent:</b> Friday, May 02, 2008 9:58 AM<br>
<b>To:</b> Rules Users List<br>
<b>Subject:</b> Re: [rules-users] OutOfMemory Error - 3500 Rules<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><br>
Barry,<br>
<br>
First of all, aside from permgen issues, if I remember correctly,
we fixed a pretty serious memory leak bug around August/September of last year.
So, I strongly advise you to upgrade to Drools 4.0.7, that is about to be
released.<br>
<br>
Regarding permgen, the best way to save space on it is to
(assuming you are using 4.0.7), share your rulebases as much as possible. Each
rulebase you create consumes a bit of the permgen space. More rulebases means
more space consumed.<br>
<br>
Hope it helps.<br>
<br>
[]s<br>
Edson<br>
<br>
<o:p></o:p></p>
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<p class=MsoNormal>2008/5/2 Barry K <<a href="mailto:barry.knapp@railinc.com">barry.knapp@railinc.com</a>>:<o:p></o:p></p>
<p class=MsoNormal><br>
Hello,<br>
<br>
Has anyone had to resolve out of memory errors with large applications using<br>
moderatly sized rulebases?<br>
Increasing the permGen any higher does not appear to be an option for us.<br>
<br>
DROOLS Version 4.01<br>
<br>
OutOfMemory Error in PermGen space. Our application has ~5000 classes and<br>
uses ~3500 rules.<br>
Each rules has on average 3 conditions and 2 actions.<br>
<br>
The application uses multiple drools rules engines and we load multiple<br>
rulebases into memory.<br>
Would we have a small memory footprint if we combine all of our rules into a<br>
single rulebase and use agenda filtration to execute the appropriate rules?<br>
Right now it is cleaner for us to separate the rulebases.<br>
<br>
Current settings-<br>
WAS 6.1 on Solaris<br>
Max Heap 2560<br>
Max PermGen 1024<br>
<br>
WAS 6.1 throws startup errors if we increase the Max PermGen above 1024, so<br>
we are looking for alternative solutions.<br>
This seems like a lot of memory for permGen anyway.<br>
<br>
<br>
Asides:<br>
We do not use WorkingMemoryFileLogger<br>
We have tried using a newer Janino jar but we still encounter the<br>
OutOfMemoryError.<br>
<br>
<br>
When we have the rules engine running it is extremely fast and we are very<br>
pleased with being able to create our rules in Decision Table format. If<br>
you have any suggestions for the above issue that would be great.<br>
<br>
What would you estimate the permGen usage would be on a 3500 rule RuleBase<br>
alone?<br>
<span style='color:#888888'>--<br>
View this message in context: <a
href="http://www.nabble.com/OutOfMemory-Error---3500-Rules-tp17019001p17019001.html"
target="_blank">http://www.nabble.com/OutOfMemory-Error---3500-Rules-tp17019001p17019001.html</a><br>
Sent from the drools - user mailing list archive at Nabble.com.<br>
<br>
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<p class=MsoNormal><br>
<br clear=all>
<br>
-- <br>
Edson Tirelli<br>
JBoss Drools Core Development<br>
Office: +55 11 3529-6000<br>
Mobile: +55 11 9287-5646<br>
JBoss, a division of Red Hat @ <a href="http://www.jboss.com">www.jboss.com</a>
<o:p></o:p></p>
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