Re: [rules-users] 14GB of NotNodeLeftTuples produced by one rule?

The amount of memory required for 150K type "a" depends on the actual distribution of this data w.r.t. fields id and user, and other circumstances; it is not only the rule that is to blame. There is one flaw, though: The rule would fire twice for a matching pair of events of type "a". It's possible that you do want to have a type "b" for both combinations of user and friendid, but you could create both in a single rule, which should halve your memory requirements. If there is no ordered attribute, use the timestamp to restrict a pair to only one combination (hint: "after"). This will still generate a lot of network nodes. Other ideas for reduction may have to take the entire application scenario into account, e.g., can you retract events after they have been paired, or how do you do inserts and calls to fireAllRules, etc. Most importantly, however, is the actual frequency of id and user values in relation to type "a" events. -W On 07/01/2013, Svenja Brunstein <svenja.brunstein(a)gmail.com&gt; wrote: > Hi all, > > we observe a strange behavior with one of our rules. After deployment > and sending lots of events (~150,000 of type "a"), the server slows down > rapidly until it runs out of memory. > We checked with VisualVM which objects are filling the memory: In one > moment there were almost 14GB of NotNodeLeftTuples (88,933,186 Instances)! > > This is our rule: > > rule "example" > when > $evt1:EventObject(type=='a', $id:data['id'], $user:user) from entry-point > internalstream > $evt2:EventObject(type=='a', data['id']==$id, user!=$user, $user2:user) > from entry-point internalstream > not(EventObject(type=='b', user==$user, data['friendid']==$user2) from > entry-point internalstream) > then > EventObject evt = new EventObject(); > evt.setType('b'); > evt.setUser($evt1.getUser()); > evt.put('friendid', $evt2.getUser()); > entryPoints['internalstream'].insert(evt); > end > > Is that behavior correct for such a size of event combinations when using a > NOT in the rule? > > Thanks, > Svenja > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users