SuoNayi created AMQ-4467:
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Summary: Memory usage percent can be exceeded much if PFC is
disabled
Key: AMQ-4467
URL: https://issues.apache.org/jira/browse/AMQ-4467
Project: ActiveMQ
Issue Type: Bug
Components: Broker
Affects Versions: 5.x
Reporter: SuoNayi
Fix For: 5.9.0
If PFC is disabled, when the store cursor checks limits, it checks only the
memory percentage of its own MemoryUsage and compares it to the high water
mark. Otherwise if PFC is enabled, it checks whether the MemoryUsage is "full"
but the "isFull" method also checks its parents.
This issue arrises when you have memory limits set on queues higher than the
overall system limit, as well as if you have multiple queues who's memory
limits combined are higher than the overall system limit. These settings must
be taken into account.
The original form can be found at
http://activemq.2283324.n4.nabble.com/What-can-be-reason-of-460-memory-usage-limit-td4665651.html
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