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From "Dejan Bosanac (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (AMQ-4467) Memory usage percent can be exceeded much if PFC is disabled
Date Tue, 30 Apr 2013 11:48:16 GMT

     [ https://issues.apache.org/jira/browse/AMQ-4467?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Dejan Bosanac resolved AMQ-4467.
--------------------------------

    Resolution: Fixed
      Assignee: Dejan Bosanac

This is now fixed with svn revision 1477574. Thanks for raising the issue and providing the
test case.
                
> 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
>            Assignee: Dejan Bosanac
>             Fix For: 5.9.0
>
>         Attachments: AMQ-4467.patch
>
>
> 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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