Hello My app is functioning consumer/producer model. 1.Producer reads the data from DB and inserts to blocking queue 2.Consumer reads the data from queue and execute the rules using drools stateless session. Both producer and consumer run asynchronously. in my testing I found the following 1. for 1000 facts at a time and no rules in drl, cpu usage is maintained at 25-30% in my PC(Intel core 2 CPU,2.13 GH,2G RAM) - with no rules in drl, Is this cpu usage acceptable? 2. for 1000 facts at a time and ~60 rules in drl, cpu usage is maintained at 50-60% on the same PC. 3. If I have 1 sec wait between each execution of rules in consumer, then cpu usage is maintained < 5% high CPU usage is being big concern to me. Is this expected while using drools? Do others see same cpu usage too? Please share your thoughts. appreciate your input. Thanks -- View this message in context: http://www.nabble.com/high-cpu-usage-tp22691131p22691131.html Sent from the drools - user mailing list archive at Nabble.com.