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From "Robbie Gemmell (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (QPID-3758) [Java] Reduce memory overhead of Sessions
Date Sun, 05 Feb 2012 21:03:59 GMT

     [ https://issues.apache.org/jira/browse/QPID-3758?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robbie Gemmell resolved QPID-3758.
----------------------------------

    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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