How does Apache Artemis manage heap space (RAM)

1
votes

In our projects, we use two queues, one for normal processing, and another for errors. The "error" queue sometimes gets filled with "error" messages, which are sitting there, until a human checks them out. In some cases, the "error" queue fills out with a lot of messages, and then the JVM runs out of heap.

For instance, currently, the JVMs configured with max 4GB heap, and get OOM exception at random times. We used a MemoryAnalyzer as well as IBM Heap Analyzer and both somewhat point to Artemis. When I checked the size of the journal on the file system, it is about 5GB.

We send:

  • Small messages
  • Persistent
  • Not using Netty or remoting (just use Artemis for async processing)

So, my questions are about Apache Artemis heap management and recommendations:

  1. Does it store persistent messages in RAM as well, even if they are already stored on the file system?
  2. If #1 is true, what is the strategy to control/limit amount od RAM allocated by Artemis?

Appreciate any help!

1
javaactivemq-artemis

1 Answers

0
votes

for those interested in this topic, the answer was provided on the Artemis forum: http://activemq.2283324.n4.nabble.com/How-does-Apache-Artemis-manage-heap-space-RAM-tt4723220.html