title: ActiveMQ, consumers with prefetch=0, increasing "Enqueues" count in console (because of polling?)
body: <p>Using Spring-configured ActiveMQ, with a listener configured with a prefetch=0 connectionFactory and 5-5 concurrency, we're seeing the listeners apparently poll for new messages instead of the broker pushing messages, as expected.</p>
  
  <p>However, in the ActiveMQ web console for the "Active Listeners" of our queue, I see that the "Enqueues" column count continually rises at a rapid rate (about 1 every second). Is this normal behavior? Is this just reflecting each poll of the listeners for new messages, now that we have prefetch=0?  It just seems a bit strange that the queues are showing an increasing Enqueue count when there's no actual messages they're working. Was also wondering if there's a way to throttle the poll frequency, or have some delay before each consumer polls the broker for new messages.</p>
  
  <p>Pic of the console, showing the ever-increasing Enqueue count of each consumer with prefetch=0, even when there's no messages to work:</p>
  
  <p><a href="http://activemq.2283324.n4.nabble.com/file/n4666021/enqueues.png" rel="nofollow">http://activemq.2283324.n4.nabble.com/file/n4666021/enqueues.png</a></p>