[rules-users] Migrating from 4.0.7 to 5.4.0.Final

[Wolfgang Laun]

It seems that the problems reported by the OP are mostly (if not all)
related to building KnowledgePackages from DRL files. Drools has been
through several 5.x versions with (among others) many extensions to
the DRL language, so some increase in resource consumption is to be
expected.

Most production scenarios, however, use the recommended practice of
loading compiled KnowledgePackages that were serialized in a separate
runs.

Does the reported increase in execution times ("2-3 times slower")
relate to rule execution only, without compiling? If I understand the
OPs statement correctly, this increase was observed after the patch
reducing PermGen space.

-W



On 03/07/2012, pgras <patrick.gras at generali.ch> wrote:
> Hello,
>
> I'm considering migrating one of our key (several thousands of rules,
> stateful sessions, and beans with propertyChangeSupport) application from
> 4.0.7 to 5.4 and your message isn't very encouraging :)
>
> Have you opened some JIRA's or have you made some other discoveries ?
>
> I will post my experiences here if I discover something but I maybe will
> have to wait until august before I can start with the migration.
>
> -Patrick
>
> --
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