You could create a listener and combine it with a log. There is org.drools.event.rule.DefaultAgendaEventListener that has two methods I use to log which rule started firing and when the rule completes firing with: @Override public void beforeActivationFired(BeforeActivationFiredEvent event) { try { logFile.write("Package(" + event.getActivation().getRule().getPackageName() + ").Rule(" + event.getActivation().getRule().getName() + ") firing ... "); } catch (Exception e) { } } @Override public void afterActivationFired(AfterActivationFiredEvent event) { try { logFile.write("done!\n"); } catch (Exception e) { } } You could obviously do other logging with time and date stamps, or send it to a database rather than a .log file like I'm doing here. In my case I get a list of all rules that fire in a fireallrules session. I can see if a rule fires multiple times, or ends up in an endless loop. Peace! Dean -----Original Message----- From: rules-users-bounces(a)lists.jboss.org [mailto: rules-users-bounces(a)lists.jboss.org] On Behalf Of arrehman Sent: Wednesday, October 12, 2011 1:21 PM To: rules-users(a)lists.jboss.org Subject: [rules-users] How to improve drools performance? Is there a way to log / monitor the time taken for rule in a Drools rule set? Is there a way to make sure that one rule is not executed more than once(It seems to be happening in my case) What are the general guidelines on improving Drools performance? Currently I am using a one single DRL file with 100 odd rules. Any additiional information you need will be provided. Thanks, Abdul -- View this message in context: http://drools.46999.n3.nabble.com/How-to-improve-drools-performance-tp341... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users