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Posted to dev@activemq.apache.org by "Tomáš Martinec (JIRA)" <ji...@apache.org> on 2012/12/18 14:38:12 UTC

[jira] [Commented] (AMQ-4231) RWLock in queue does not used properly - performance improvement

    [ https://issues.apache.org/jira/browse/AMQ-4231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13534887#comment-13534887 ] 

Tomáš Martinec commented on AMQ-4231:
-------------------------------------

Related issues:

AMQ-4230 and AMQ-4232
                
> RWLock in queue does not used properly - performance improvement
> ----------------------------------------------------------------
>
>                 Key: AMQ-4231
>                 URL: https://issues.apache.org/jira/browse/AMQ-4231
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.4.2, 5.7.0
>         Environment: fedora15; ubuntu 12.10; debian; probably independent
>            Reporter: Tomáš Martinec
>            Priority: Minor
>              Labels: locks, performance,, queue,, synchronization,
>         Attachments: unsynchronizing-cursors.diff
>
>
> The full story is in the user forum under title:
> Activemq 5.4.2 hangs when the temp disk usage is used
> The advantage of RW locks in Queue class is not used much. The cursors objects are synchronized, so the readers cannot access the queued messages concurrently.
> The fixing effort of this issue may not be worth it, but you may consider this issue during fixing related issues.
>  

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