I found the cause is that add simpleAuthenticationPlugin to control security, the the B Broker connect to A Broker with login (define in "networkConnector"). If large no. of topic message sent, it would slow than whole ActiveMQ server.
Anyone can help to solve this, thanks. <networkConnector name="LinkToMdsBroker1" duplex="true" networkTTL="2" uri="static:(tcp://adsr2mds1:61616)?wireFormat.maxInactivityDuration=0&socketBufferSize=655360" prefetchSize="1000" conduitSubscriptions="false" <b>userName="system" password="manager"* > -- Sent from: http://activemq.2283324.n4.nabble.com/ActiveMQ-User-f2341805.html