Hello, I am using ActiveMQ Scheduler and see a slow delivery rate when trying to load test the solution.
My scenario: send a batch of scheduled messages (e.g. 1000 messages) with pretty much the same due to time. (e.g. AMQ_SCHEDULED_DELAY in 20 seconds). There is one connection and session to serve a producer and one for a consumer. In this test I expect a similar delivery rate for the producer and the consumer. But while the producer is fast and can reach 50+ messages/second the consumer consuming rate is around 2-3 messages/second. As a result, the delivery delay can be 20 + minutes to process several thousand messages. When I investigated deeper I realized that the problem is not on the client-side /consumer. Please note the consumer is fast. The problem is that the ActiveMQ Job scheduler re-queues the messages which are due back to the original queue with the rate of approx 2-3 messages/second. It is even visible when you refresh the Admin UI of Active MQ. When the messages are re-queued back the consumer can consume them very quickly. I haven't found any documentation/details about the scheduler configuration except a couple of pages about setting delays. Can someone explain why this happens and a bunch of messages due are hanging in Scheduled state so long? What is missed? Please note, I am using the version Active MQ 5.14.3 (docker image) Thanks, Roman -- Sent from: http://activemq.2283324.n4.nabble.com/ActiveMQ-User-f2341805.html
