How are consumers and producers distributed? Also, how about the conduitSubscriptions setting on the network connector?
If conduit subscriptions is false, every consumer added to the network leads to a cross-network consumer from that broker to all the broker's peers; and each broker then propogates the subscription to its peers - that's how dynamic routing works in ActiveMQ. One way to see this is to look at the number of consumers registered on the Topic for each broker. Also keep in mind that each separate Topic subscription gets a copy of the message. So, one message going to 1000 Topic subscriptions results in 1000 copies of the message. Try enabling conduitSubscriptions on the network connector so only 1 copy of a message crosses between any two brokers: http://activemq.apache.org/networks-of-brokers.html conduitSubscriptions="true" -- View this message in context: http://activemq.2283324.n4.nabble.com/topic-performance-in-cluster-tp4680057p4680086.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.