11:51 a.m.
hi, I was facing similar issues some time back, though I was using a
ruleflow and had >20000 fact objects evaluated daily. The problem I was
facing was that the running time would get significantly slower day by day.
The solution that fixed it was to use a statefulSession and call dispose()
on the session once it is done. This made a single-run slower than before,
but atleast fixed the problem of exponentially increasing the run-time after
several days.
This might not necessarily be the ideal solution, so before you move to a
StatefulSession and call session.dispose() after processing, you might want
to try to increase the memory for the jvm, if is lower than the size of your
facts, this might fix it.
It'd be useful to know if somebody has a better solution to Kris's problem.
Thanks,
- am
On Wed, Nov 26, 2008 at 9:35 AM, Kris Nuttycombe
<kris.nuttycombe(a)gmail.com>wrote:
Hi, all,
I'm encountering significant problems with running out of memory when
executing a small ruleset (only 16 rules, < 100 facts). I've run jmap on the
process (which has previously spawned multiple stateless sessions in
parallel) and it looks like Drools, and specifically the Eclipse jdt
compiler, is seriously eating up memory. The code calling the is fairly
simple; one of the initial facts is an accumulator that I refer to later:
StatelessSession session = ruleBase.newStatelessSession();
session.execute(initialFact, accumulator);
accumulator.doSomething();
where ruleBase is a shared instance, and initialFact is a base fact that is
expanded during rules processing. Is there something I should be doing to
dispose the session after use to release the objects created by the drools
compiler after use? I'm using a shared RuleBase, and I'm wondering whether
it is somehow keeping references around. Are these sorts of object counts to
be expected?
Thanks,
Kris
Instance Counts for All Classes (excluding platform) 104827
instances<http://carrot.gaiam.com:7000/instances/0x2aaacf5646f8>of class
net.jxta.impl.document.LiteXMLElement$charRange<http://carrot.gaiam.com:7000/class/0x2aaacf5646f8>
26806 instances <http://carrot.gaiam.com:7000/instances/0x2aaacf5631e8> of
class
net.jxta.impl.document.LiteXMLElement$tagRange<http://carrot.gaiam.com:7000/class/0x2aaacf5631e8>
26733 instances <http://carrot.gaiam.com:7000/instances/0x2aaad66ea7f0> of
class
org.eclipse.jdt.internal.compiler.lookup.MethodBinding<http://carrot.gaiam.com:7000/class/0x2aaad66ea7f0>
17366 instances <http://carrot.gaiam.com:7000/instances/0x2aaad66e3c88> of
class
[Lorg.eclipse.jdt.internal.compiler.lookup.TypeBinding;<http://carrot.gaiam.com:7000/class/0x2aaad66e3c88>
12412 instances <http://carrot.gaiam.com:7000/instances/0x2aaacf032560> of
class
com.sun.enterprise.loader.EJBClassLoader$SentinelInputStream<http://carrot.gaiam.com:7000/class/0x2aaacf032560>
10974 instances <http://carrot.gaiam.com:7000/instances/0x2aaad5504450> of
class
org.apache.commons.collections.SequencedHashMap$Entry<http://carrot.gaiam.com:7000/class/0x2aaad5504450>
8683 instances <http://carrot.gaiam.com:7000/instances/0x2aaad68c3840> of class
org.eclipse.jdt.internal.compiler.codegen.CachedIndexEntry<http://carrot.gaiam.com:7000/class/0x2aaad68c3840>
7708 instances <http://carrot.gaiam.com:7000/instances/0x2aaacf55e9d8> of class
net.jxta.impl.document.LiteXMLElement<http://carrot.gaiam.com:7000/class/0x2aaacf55e9d8>
7450 instances <http://carrot.gaiam.com:7000/instances/0x2aaad5c4b6c0> of class
org.hibernate.engine.CollectionKey<http://carrot.gaiam.com:7000/class/0x2aaad5c4b6c0>
6836 instances <http://carrot.gaiam.com:7000/instances/0x2aaaced3c3f8> of class
org.netbeans.modules.schema2beans.AttrProp<http://carrot.gaiam.com:7000/class/0x2aaaced3c3f8>
6271 instances <http://carrot.gaiam.com:7000/instances/0x2aaad6642d18> of class
org.eclipse.jdt.internal.compiler.lookup.FieldBinding<http://carrot.gaiam.com:7000/class/0x2aaad6642d18>
5643 instances <http://carrot.gaiam.com:7000/instances/0x2aaad6796890> of class
org.eclipse.jdt.internal.compiler.ast.MessageSend<http://carrot.gaiam.com:7000/class/0x2aaad6796890>
4928 instances <http://carrot.gaiam.com:7000/instances/0x2aaad68a6018> of class
org.eclipse.jdt.internal.compiler.util.HashtableOfObject<http://carrot.gaiam.com:7000/class/0x2aaad68a6018>
4895 instances <http://carrot.gaiam.com:7000/instances/0x2aaad66e3fa8> of class
[Lorg.eclipse.jdt.internal.compiler.lookup.ReferenceBinding;<http://carrot.gaiam.com:7000/class/0x2aaad66e3fa8>
4546 instances <http://carrot.gaiam.com:7000/instances/0x2aaad669f968> of class
org.eclipse.jdt.internal.compiler.lookup.LocalVariableBinding<http://carrot.gaiam.com:7000/class/0x2aaad669f968>
4472 instances <http://carrot.gaiam.com:7000/instances/0x2aaad687a0a8> of class
[Lorg.eclipse.jdt.internal.compiler.lookup.LocalVariableBinding;<http://carrot.gaiam.com:7000/class/0x2aaad687a0a8>
4128 instances <http://carrot.gaiam.com:7000/instances/0x2aaad6103ff0> of class
org.drools.rule.Pattern<http://carrot.gaiam.com:7000/class/0x2aaad6103ff0>
3899 instances <http://carrot.gaiam.com:7000/instances/0x2aaacf493c90> of class
net.jxta.impl.id.UUID.UUID<http://carrot.gaiam.com:7000/class/0x2aaacf493c90>
3867 instances <http://carrot.gaiam.com:7000/instances/0x2aaad5c416c0> of class
org.hibernate.engine.EntityEntry<http://carrot.gaiam.com:7000/class/0x2aaad5c416c0>
3731 instances <http://carrot.gaiam.com:7000/instances/0x2aaad5c54d88> of class
org.hibernate.collection.PersistentSet<http://carrot.gaiam.com:7000/class/0x2aaad5c54d88>
3685 instances <http://carrot.gaiam.com:7000/instances/0x2aaad66ca420> of class
org.eclipse.jdt.internal.compiler.lookup.UnresolvedReferenceBinding<http://carrot.gaiam.com:7000/class/0x2aaad66ca420>
3360 instances <http://carrot.gaiam.com:7000/instances/0x2aaad6c12770> of class
org.drools.reteoo.SingleTupleSinkAdapter<http://carrot.gaiam.com:7000/class/0x2aaad6c12770>
3266 instances <http://carrot.gaiam.com:7000/instances/0x2aaacf543dc0> of class
net.jxta.document.MimeMediaType<http://carrot.gaiam.com:7000/class/0x2aaacf543dc0>
3264 instances <http://carrot.gaiam.com:7000/instances/0x2aaad6370288> of class
org.drools.spi.PatternExtractor<http://carrot.gaiam.com:7000/class/0x2aaad6370288>
3163 instances <http://carrot.gaiam.com:7000/instances/0x2aaad5f8b990> of class
org.apache.axis.encoding.TypeMappingImpl$Pair<http://carrot.gaiam.com:7000/class/0x2aaad5f8b990>
3137 instances <http://carrot.gaiam.com:7000/instances/0x2aaad5caad98> of class
org.hibernate.collection.PersistentBag<http://carrot.gaiam.com:7000/class/0x2aaad5caad98>
2881 instances <http://carrot.gaiam.com:7000/instances/0x2aaad681b000> of class
org.eclipse.jdt.internal.compiler.lookup.MethodScope<http://carrot.gaiam.com:7000/class/0x2aaad681b000>
2688 instances <http://carrot.gaiam.com:7000/instances/0x2aaad6161860> of class
org.drools.base.ClassFieldExtractor<http://carrot.gaiam.com:7000/class/0x2aaad6161860>
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
--
I'm worst at what I do best, and for this gift I feel blessed
-- Kurt Cobain