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Posted to dev@activemq.apache.org by "Dejan Bosanac (JIRA)" <ji...@apache.org> on 2011/06/22 10:00:49 UTC

[jira] [Created] (AMQ-3374) Long KahaDB transactions could lead to OutOfMemory

Long KahaDB transactions could lead to OutOfMemory
--------------------------------------------------

                 Key: AMQ-3374
                 URL: https://issues.apache.org/jira/browse/AMQ-3374
             Project: ActiveMQ
          Issue Type: Bug
    Affects Versions: 5.5.0
            Reporter: Dejan Bosanac
            Assignee: Dejan Bosanac
             Fix For: 5.6.0


Problem: all writes are kept in memory until the sync time, which for long transactions could be a problem.

Solution: define max transaction size and if threshold is reached keep the rest of the writes in a temp file

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[jira] [Resolved] (AMQ-3374) Long KahaDB transactions could lead to OutOfMemory

Posted by "Dejan Bosanac (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/AMQ-3374?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dejan Bosanac resolved AMQ-3374.
--------------------------------

    Resolution: Fixed

This should now be fixed with svn revision 1138443

Default size of the transaction that will be kept in the memory is 10MB. This can be tuned with {{maxKahaDBTxSize}} system property (in bytes)

> Long KahaDB transactions could lead to OutOfMemory
> --------------------------------------------------
>
>                 Key: AMQ-3374
>                 URL: https://issues.apache.org/jira/browse/AMQ-3374
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 5.5.0
>            Reporter: Dejan Bosanac
>            Assignee: Dejan Bosanac
>             Fix For: 5.6.0
>
>
> Problem: all writes are kept in memory until the sync time, which for long transactions could be a problem.
> Solution: define max transaction size and if threshold is reached keep the rest of the writes in a temp file

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For more information on JIRA, see: http://www.atlassian.com/software/jira

        

[jira] [Commented] (AMQ-3374) Long KahaDB transactions could lead to OutOfMemory

Posted by "Dejan Bosanac (Commented) (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/AMQ-3374?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13176156#comment-13176156 ] 

Dejan Bosanac commented on AMQ-3374:
------------------------------------

Additional fix in svn revision 1224890

Transaction size is actual number of pages we keep in memory.
                
> Long KahaDB transactions could lead to OutOfMemory
> --------------------------------------------------
>
>                 Key: AMQ-3374
>                 URL: https://issues.apache.org/jira/browse/AMQ-3374
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 5.5.0
>            Reporter: Dejan Bosanac
>            Assignee: Dejan Bosanac
>             Fix For: 5.6.0
>
>
> Problem: all writes are kept in memory until the sync time, which for long transactions could be a problem.
> Solution: define max transaction size and if threshold is reached keep the rest of the writes in a temp file

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