Hello Art, thanks for your help. Yes, it allready helped and confirmed that my first suggestion about this issue of decreasing the subscriptions from each client to a mininum will be the first step to go.
But I'm not sure if removing all selectors would be a solution: What I've missed in my question was that we are talking about 2000 till 20000 clients running in one network, each subscribing n-times to one JMS Server. So we are afraid that removing those selectors will cause a lot of unnecessary network traffic. To give you the whole example: Right now we are talking at that one customer about 2400 clients doing 28 individual subscriptions (that should make use of the "in" selector in my opinion) at least. Thanks in advance! Patrik -- Sent from: http://activemq.2283324.n4.nabble.com/ActiveMQ-Dev-f2368404.html
