Hi What's your system usage in conf/activemq.xml ? Are you using both persistent and non persistent messages ?
Regards JB On Tue, Nov 14, 2023 at 6:45 PM CASAUX Nicolas < nicolas.cas...@soprasteria.com> wrote: > > Hello, > > I'm facing some memory problems with ActiveMQ “Classic” with VirtualTopics > and associated queues. > > My scenario is this: > > - I'm using ActiveMQ 5.17.6 on Windows > - I'm using vanilla config (so -Xms1G -Xmx1G) > - I have one virtual topic VirtualTopic.test > - I have 3 queues associated to the topic: > - Consumer.a.VirtualTopic.test > - Consumer.b.VirtualTopic.test > - Consumer.c.VirtualTopic.test > - I publish with JMeter 2000 messages without persistence with a 25 Ko > payload (which represent 25 Ko * 2000 = 50 Mo of data to store in the > broker) > > Expected results: > > - The 3 queues are filled with 4000 messages each. > - The heap used on visualVM is roughly 80Mo after GC (I assume 50 Mo > of message + heap required by the broker) > - No store or temp is used. > - Memory limit in the broker shows 751619277 bytes (70% of 1Go) > > Unexpected results: > > - The MemoryPercentUsage shows 20% (which represents about 150 Mo) > > I guess that this 150 Mo is the total (3 * 50 Mo) of the memory used by > the 3 queues, but they actually store 3 times the same messages. And the > Heap usage (80 Mo) kind of proves it. > > The real issue is that when I publish some more messages, the broker > considers very quickly that the memory used is falsely high, and then it > starts some persistence mechanism. And this problem obviously gets worst > as I add more queues to the virtual topic. > > I hope it's clear enough ! > > Thanks in advance ! > > > Nicolas Casaux > > C2 – Usage restreint >
