Matthias Wessendorf Thanks! It's pretty default configuration. Nothing interesting there. Could you share with me the heap dump so I can take the look?

I would like to take a look at hornetq journal? By default it's located in $JBOSS_HOME/standalone/data/ directory. You can send me the the whole data directory. I'm interested in following directories messagingbindings, messagingjournal, messaginglargemessages, messagingpaging.