Hello Jean-Baptiste 😊,
It's all default:
<systemUsage>
<systemUsage>
<memoryUsage>
<memoryUsage percentOfJvmHeap="70" />
</memoryUsage>
<storeUsage>
<storeUsage limit="100 gb"/>
</storeUsage>
<tempUsage>
<tempUsage limit="50 gb"/>
</tempUsage>
</systemUsage>
</systemUsage>
I published only non-persistent messages during the tests.
Regards,
Nicolas
C2 – Usage restreint
-----Message d'origine-----
De : Jean-Baptiste Onofré <[email protected]>
Envoyé : mercredi 15 novembre 2023 11:34
À : [email protected]
Objet : Re: [ActiveMQ Classic] Incorrect memory percent usage ?
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 <
[email protected]<mailto:[email protected]>> 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
>
