[rules-users] Memory issue with drools (using 10000 rules)

[Benson Fung]

is it necessary to execute 10000 rules in one time for your case?

Why don't execute rule selectively?



2011/4/26 Mark Proctor <mproctor at codehaus.org>

>  There is no out of the box way to improve that, beyond just partitioning
> your rulebases yourself.
>
> If you would like to get involved in R&D we can do lazy network building
> and try pushing unused parts of the rule network to disk.
>
> Mark
>
> On 26/04/2011 12:05, Shebs, Liron wrote:
>
>  Hello All,
>
>
>
> I’m working at HP Software R&D and we are considering using drools in our
> product.
>
> Benchmarking tests showed that running 10,000 rules consumes 382mb.
>
> This is too high for our system requirements, and we would like to know how
> we can improve it.
>
> Technical details:
>
> -      Drools version: 5.1 with default configuration.
>
> -      All rules look like this:
>
>
>
> rule "status-Fixed-Open"
>
>                when
>
>                              event : FieldChangedEvent(fieldName ==
> "status", oldValue == "Fixed");
>
>                              entity : Entity(entityType == "mock-entity");
>
>                              eval(((String)
> entity.getFieldValue("status")).equals("Open"));
>
>                then
>
>                   do Something…
>
> end
>
>
>
> -      Loading code:
>
>
>
> KnowledgeBuilder knowledgeBuilder =
> KnowledgeBuilderFactory.newKnowledgeBuilder();
>
> for(all resources)
>
> {
>
> knowledgeBuilder.add(resource, ResourceType.DRL);
>
> }
>
> knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase();
>
>
> knowledgeBase.addKnowledgePackages(knowledgeBuilder.getKnowledgePackages());
>
>
>
> Any insights are most appreciated.
>
>
>
> Thank You,
>
> Liron, HP Software R&D
>
>
>
>
>
>
>
>
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