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From "james (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMQ-5039) allow for thread pooling with multi kahadb persistence
Date Mon, 10 Feb 2014 19:55:21 GMT
james created AMQ-5039:
--------------------------

             Summary: allow for thread pooling with multi kahadb persistence
                 Key: AMQ-5039
                 URL: https://issues.apache.org/jira/browse/AMQ-5039
             Project: ActiveMQ
          Issue Type: Improvement
          Components: Message Store
    Affects Versions: 5.9.0
            Reporter: james
            Priority: Minor


I am probably using the multi KahaDB storage a bit differently than others, but i expect to
be using many instances within my activemq broker.  As such, i noticed that the kahadb impl
uses a bunch of threads per instance.  Some of this may be necessary, but the scheduled tasks
at the least could most likely allow for sharing a Timer or ScheduledExecutorService instance.

Locations:
* Journal creates a Timer instance (even though Scheduler has a shared instance)
* MessageDatabase creates a dedicated checkpoint thread (which is essentially a scheduled
task)
* DataFileAppender has a dedicated writer thread.  possibly harder to share.



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