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https://issues.apache.org/jira/browse/AMQ-5578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15176501#comment-15176501
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ASF subversion and git services commented on AMQ-5578:
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Commit e89b7a57f1aa206830998ae022c041302a22baea in activemq's branch 
refs/heads/master from [~tabish121]
[ https://git-wip-us.apache.org/repos/asf?p=activemq.git;h=e89b7a5 ]

https://issues.apache.org/jira/browse/AMQ-5578

Remove unnecessary zero init block as the java spec requires the
allocations to do this already.  Fix some warnings.

> preallocate journal files
> -------------------------
>
>                 Key: AMQ-5578
>                 URL: https://issues.apache.org/jira/browse/AMQ-5578
>             Project: ActiveMQ
>          Issue Type: Improvement
>          Components: Message Store
>    Affects Versions: 5.11.0
>            Reporter: Gary Tully
>            Assignee: Gary Tully
>              Labels: journal, kahaDB, perfomance
>             Fix For: 5.14.0
>
>
> Our journals are append only, however we use the size to track journal 
> rollover on recovery and replay. We can improve performance if we never 
> update the size on disk and preallocate on creation.
> Rework journal logic to ensure size is never updated. This will allow the 
> configuration option from https://issues.apache.org/jira/browse/AMQ-4947 to 
> be the default.



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