[rules-users] Optimizing the size of a StatefulKnowledgeSessionobject.

[Swindells, Thomas]

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 at lists.jboss.org [mailto:rules-users-
> bounces at lists.jboss.org] On Behalf Of Johannes Meier
> Sent: 19 May 2010 11:08
> To: rules-users at 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-StatefulKnowledgeSession-
> object-tp828728p828728.html
> Sent from the Drools - User mailing list archive at Nabble.com.
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