Hi, If I have many processes (one starts every minute or so) and I pass parameters as a map in startProcess and then I am inserting facts into the working memory. These are local variables (both parameters and facts) in my code which will eventually come out of scope when leaving their block and will be garbage collected. I'm using one session for all process instances. So my question is: when this happens, will the engine recognize this and free the memory inside the flow or I need to perform manual cleanup like retracting the fact etc. AFAIK a fact is just a pointer, but will it be removed from the map by the engine? If so when? Thanks, Marton -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Memory-management-man... Sent from the Drools - User mailing list archive at Nabble.com.