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https://issues.apache.org/jira/browse/QPID-3758?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robbie Gemmell resolved QPID-3758.
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Resolution: Fixed
Looked this over a while back, obviously forgot to hit the button :)
> [Java] Reduce memory overhead of Sessions
> -----------------------------------------
>
> Key: QPID-3758
> URL: https://issues.apache.org/jira/browse/QPID-3758
> Project: Qpid
> Issue Type: Improvement
> Components: Java Common
> Reporter: Rob Godfrey
> Assignee: Rob Godfrey
> Fix For: 0.15
>
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> The 0-10 Session object creates a 64Kb command buffer by default... in the
> context of a broker which may have thousands of concurrently open sessions
> this is too large a burden.
> Observation has shown that most common use cases have relatively low
> utilization of this buffer, and that the therefore we can replace the use of
> a fixed size array with an Integer keyed Map.
> If performance / autoboxing overhead is observed to be an issue, we could
> later update to use a primitive int base Map-like implementation such as that
> available here: http://acs.lbl.gov/software/colt/
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