Hi, I am facing a strange performance issue with an activemq broker (v. 5.4.0). The setup is very simple: - 1 broker instance - no persistence provider - about 200 consumers and producers using non-persistent messages. The message size can be anything up to 1-2MB but is usually smaller. - dedicated task runner has been disabled - producer flow control enabled
Most message producers open and close their connections for every message sent but the number of messages can vary from 5-10 per day to 20-30 every minute, meaning that we do have thousands of connections being opened and closed every day. This is working well enough with delivery times of up to a few hundred milliseconds, but every know and then there is a "hiccup". Starting the jms connection slows down to tens of seconds for no apparent reason, then immediately picks up again. Message delivery of already established connections are not affected, and the slowdowns seem totally random. Number of threads is mostly constant, and the memory levels seem fine as well, with the total garbage collection time being lower than one single slowdown. No exceptions or warnings can be found in the logs, and the slow connections do eventually start. The message delivery on them is fast and not problematic at all. Could anyone help me in finding the root cause of this issue? Could the producer flow control delay the start of a new connection but not the flow of messages? Thank you, Zsombor -- View this message in context: http://activemq.2283324.n4.nabble.com/Slow-starting-activemq-connection-tp4661562.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.
