Hi Leonardo, Thank you very much for your fast response! I mentioned why I re-added the same rules within the issue-description. It is something like a "simulation" of lots of rule changes. We are building an application where rules will be created programmatically. Rules will often change. For me - it should be the same, whether I replace a rule with a DRL that is in fact different from the original one, or with the same DRL. Espacially when I do NOT change the DRL, the memory consumed by the KB should not increase! But in fact it does ... at least if the rules have lots of conditions. To give an example: I loaded 500 rules and used 64 MB heapsize. After I had loaded all the rules the first time, the heap consumption was 21 MB. Aber the second load, the heap consumption was 23 MB. It increased about 2 MB on each interation. The application crashed on the 27th iterattion due to "OutOfMemory: heap size". Even a forced garbage collection during the iterations could not help. That means: It seems that there is a small memory leak. You wrote: This problem has nothing to do with rule sessions! Caching the KnowledgeBase is exactly what we intend to do! And we want to keep this KB in memory for a long period of time (maybe some weeks) and to modify it continously. That is why I wanted to test, how Drools behaves when rules often change. For this test case it is not relevant how much rule sessions have been created, is it? Kind regards Pentarakis 2010/11/15, Leonardo Gomes <leonardo.f.gomes(a)gmail.com&gt;: > Hi Pentarakis, > > I had a quick look at your issue. I couldn't understand why you're re-adding > the same rules to your KB. > > * Now, I redo this and add the same 100 rules again to the KnowledgeBase >> (2nd run). And so on.* >> > > > Hope that helps. > > Leonardo. > > On Mon, Nov 15, 2010 at 1:38 PM, Pentarakis <pentarakis(a)gmail.com&gt; wrote: > >> >> Hi! >> >> I created a new issue some days ago. I'm new to the jboss community and >> therefore not sure whether I did it correctly. It seems like no one has >> found it yet. >> >> Could somebody have a look at it and could provide me feedback? >> >> http://jira.jboss.org/browse/JBRULES-2782 >> http://jira.jboss.org/browse/JBRULES-2782 >> >> THANK YOU VERY MUCH IN ADVANCE !!! >> >> >> Kind regards >> Pentarakis >> -- >> View this message in context: >> http://drools-java-rules-engine.46999.n3.nabble.com/Issue-2782-Potential-... >> Sent from the Drools - User mailing list archive at Nabble.com. >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >