Hi, I am using Jboss 4.2.0 and JBoss Messaging 1.4.4. I am facing a performance issue. I am using 1 publisher and 1 subscriber to a Topic. I am trying to post 36000 messages to the topic from the producer. The subscriber(consumer) takes each message and does some processing. But, what I have observed is that the publisher is slow in posting messages on the topic. If I comment out the processing code on the consumer(MessageListener) , just print the received message, then I see the postToTopic becomes fast. I was of the view that Jboss Messaging is asynchronous. but, the above observation shows that a consumer is blocking producer which is like a synchronous call. I have tried to make Slow Consumer true and also increasing the pre-fetchsize but, nothing seems to make it faster. My framework performance is kinda disturbed bcoz of this behaviour. Can somebody help me to solve this problem please? -Poonam. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4260232#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...