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https://issues.apache.org/jira/browse/AMQ-6771?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16089847#comment-16089847
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Christopher L. Shannon commented on AMQ-6771:
---------------------------------------------

[~gtully], I'll test it out soon.  I have some brokers running in an 
environment with slower storage so I can do some before/after testing on 
startup performance.

> Improve performance of KahaDB recovery check checkForCorruptJournalFiles=true
> -----------------------------------------------------------------------------
>
>                 Key: AMQ-6771
>                 URL: https://issues.apache.org/jira/browse/AMQ-6771
>             Project: ActiveMQ
>          Issue Type: Improvement
>          Components: KahaDB
>    Affects Versions: 5.15.0
>            Reporter: Gary Tully
>            Assignee: Gary Tully
>             Fix For: 5.16.0
>
>
> The KahaDB checkForCorruptJournalFiles option validates the checksum of every 
> journal batch record on startup. If a single producer writes many small 
> messages, the batch sizes in the journal will be small. The current check 
> implementation reads each batch at a time with a fseek/read sequence that can 
> be very slow over shared disks.
> The check can be a quick buffered sequential read using the maxBatchSize 
> which should already be tuned to match the disk transfer rate.



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