Github user pgfox commented on the issue:
https://github.com/apache/activemq-artemis/pull/1549
@jbertram I have added getAddressMessageUsage as an attribute; in worst
case scenario, if many clients constantly refresh their mBean view, this could
result in a high number of globalSizeBytes.get(). If I understand correctly
globalSizeBytes is on a critical path for the PostOffice.processRoute().
I don't think this change should impact the critical path or have any side
effects . ---
