Hi, In our project we would like to cache KnowledgeBase once it's created because compilation of rules takes long time and we can't afford to do it every time we need to process rules. Generaly we use ehCache as caching mechanism, but I am not sure if it's the best way to just put KnowledgeBase instance there. KnowledgeBase can have many inner objects and total size calculation is not efficient (ehCache complains about it). Setting count limit to cache object, and not memory limit can lead to out of memory or at least application performance degradation. Did anyone try to cache this object and reuse it further? Thank you in advance for answers. -- View this message in context: http://drools.46999.n3.nabble.com/KnowledgeBase-caching-tp4029276.html Sent from the Drools: User forum mailing list archive at Nabble.com.