There should be no tweaking to get it working correctly (ruleflows don't even use separate threads during execution currently). Based on your explanation however, it is not obvious why things might be going wrong. I suggest trying to use the audit view or a custom logger to figure out what is going on in both cases. If you are losing records, there must be some reason why the rules are not being executed for those records (e.g. the record does not match the conditions of the rule, the ruleflow-group is deactivated before all records have been processed, etc.). Try making a small use case where you enter a number of records and not all records seem to be processed. Then try looking at the audit log to see which rules are activated and deactivated, which ruleflow-groups are activated and deactivated, etc. If you do find a problem where you thing the ruleflow is not behaving as expected, it would be nice if you could send me a self-countained example that shows the problem and I'll try to look into it asap. One additional piece of advice: it does seem a little strange however that you are using 50 ruleflow-groups for 116 rules. Ruleflow-groups are used to specify the order in which large rule sets should be executed. If you want to specify the order for single rules, other features like salience, agenda groups, etc. might also be useful. But nevertheless, ruleflows should even work in these circumstances. Kris ----- Original Message ----- From: "Mazrim" <UE011434(a)guest.telecomitalia.it&gt; To: <rules-users(a)lists.jboss.org&gt; Subject: [rules-users] ruleflow trouble when process a large number of records > > Hello, > > I'm using drools 4.0.4 on jboss 4.0.5. > I build a ruleflow and a set of rules following the documentation on > official drools site. > The ruleflow consist of about 50 ruleflow-group and 116 rules. > The ruleflow works correctly when processing a little number of records > (100-1000). > Instead if the number of records is around 20000 (they are processed in > sets > of 100 record) many rules don't fire; so many records are lost in output. > If I process in sets of 50 records I lose less records than in sets of > 100 > records. And If I process in sets of 20 records I lose less records than > in > sets of 50 records. > Must I tweak the JVM memory or the number of JVM threads? Or does this > issue > concern the building of ruleflow (maybe it's bad built)? > > Thanks in advance > -- > View this message in context: > http://www.nabble.com/ruleflow-trouble-when-process-a-large-number-of-rec... > 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 _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users