5:07 a.m.
Dear Drools' developers and users,
I have a problem regarding the size of my Drools' StatefulKnowledgeSession.
As I'm working with a 'stateful' session that lives on a web server I have
bound this session onto my web session. That means the Drools' session is
able to access some facts from preceding calls. The Drools' session lives as
long as the web session lives.
So far so good. Now I've started to mesure the size of the
StatefulKnowledgeSession by usage of heap dumps and some profiling tools.
This yielded a size of approximately 5 MB.
Is there any approach to optimize the size of a StatefulKnowledgeSession?
Apparently this object has a lot of overhead (from my point of view)
regarding the Drools Flow and Gouvenor frameworks because I'm not utilizing
this frameworks at all (just Drools Expert). Maybe this is an approach to
optimize the session's size?
If I accept this size, is there a convenient way to serialize the
StatefulKnowledgeSession between calls? I'm thinking about storing the whole
StatefulKnowledgeSession inside the database or maybe some datastructure
apart from the websession. Every call inside one web session would have to
lead to a deserialization, application and serialization of Drools' session.
Thank you in advance for any reply.
Kind regards!
Johannes
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5:15 a.m.
New subject: Optimizing the size of a StatefulKnowledgeSessionobject.
The first question is what are you storing in your knowledge session and in particularly
are you retracting facts when they are no longer relevant or are you accumulating
duplicate values?
Is you knowledge session growing over time is it the memory usage of it staying level?
I've not done it personally but I believe it's pretty simple to persist a
knowledge session if that is the approach you choose.
Thomas
-----Original Message-----
From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-
bounces(a)lists.jboss.org] On Behalf Of Johannes Meier
Sent: 19 May 2010 11:08
To: rules-users(a)lists.jboss.org
Subject: [rules-users] Optimizing the size of a
StatefulKnowledgeSessionobject.
Dear Drools' developers and users,
I have a problem regarding the size of my Drools' StatefulKnowledgeSession.
As I'm working with a 'stateful' session that lives on a web server I have
bound this session onto my web session. That means the Drools' session is
able to access some facts from preceding calls. The Drools' session lives as
long as the web session lives.
So far so good. Now I've started to mesure the size of the
StatefulKnowledgeSession by usage of heap dumps and some profiling tools.
This yielded a size of approximately 5 MB.
Is there any approach to optimize the size of a StatefulKnowledgeSession?
Apparently this object has a lot of overhead (from my point of view)
regarding the Drools Flow and Gouvenor frameworks because I'm not utilizing
this frameworks at all (just Drools Expert). Maybe this is an approach to
optimize the session's size?
If I accept this size, is there a convenient way to serialize the
StatefulKnowledgeSession between calls? I'm thinking about storing the whole
StatefulKnowledgeSession inside the database or maybe some datastructure
apart from the websession. Every call inside one web session would have to
lead to a deserialization, application and serialization of Drools' session.
Thank you in advance for any reply.
Kind regards!
Johannes
--
View this message in context: http://drools-java-rules-
engine.46999.n3.nabble.com/Optimizing-the-size-of-a-StatefulKnowledgeSess...
object-tp828728p828728.html
Sent from the Drools - User mailing list archive at Nabble.com.
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5:26 a.m.
New subject: Optimizing the size of a StatefulKnowledgeSessionobject.
Dear Thomas,
Sorry, I forgot to mention that 5 MB is the 'initial' size. There are just
the rules and some data inside the session. From this starting point on the
session doesn't become dramatically bigger.
Yes, I'm retracting the most of the facts at points where I'm certain that
these facts aren't relevant any more. But the facts aren't a problem. It is
the size of the session with all the rules loaded.
Kind regards,
Johannes
--
View this message in context:
http://drools-java-rules-engine.46999.n3.nabble.com/Optimizing-the-size-o...
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5798
days inactive
5798
days old
2 comments
2 participants
participants (2)
-
Johannes Meier -
Swindells, Thomas