Ok, I have figured it out :
I created a META-INF/drools.rulebase.conf with the correct setting.
It works fine now.

Thanks

2013/11/12 Raphael Jolivet <raphael.jolivet@gmail.com>

Hi again.

I have looked at PermGenThresholdOption but do not find an exmaple of how to set those option porgammatically:
KnowledgeBuilder#newKnowledgeBase() does not seem to take any configuration.

Thanks for your help.
Raphael