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Posted to issues@activemq.apache.org by "ASF subversion and git services (JIRA)" <ji...@apache.org> on 2017/05/25 11:45:04 UTC
[jira] [Commented] (AMQ-4467) Memory usage percent can be exceeded
much if PFC is disabled
[ https://issues.apache.org/jira/browse/AMQ-4467?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16024604#comment-16024604 ]
ASF subversion and git services commented on AMQ-4467:
------------------------------------------------------
Commit 25f112c5c9a843f162296ad38eb79be47183e0be in activemq's branch refs/heads/master from [~gtully]
[ https://git-wip-us.apache.org/repos/asf?p=activemq.git;h=25f112c ]
[AMQ-6687] ensure transacted sends blocked on pfc do not resume after tx completion. AMQ-4467 refine the fix such that PFC kicks in such that the cache will accept messsages that push it over it's limit while it is still under the limit
> 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: Gary Tully
> Fix For: 5.15.0
>
> 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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