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https://issues.apache.org/jira/browse/DISPATCH-522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15511966#comment-15511966
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ASF subversion and git services commented on DISPATCH-522:
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Commit 152185eb91d58a924f982191bdf95d954199c47c in qpid-dispatch's branch 
refs/heads/master from [~tr...@redhat.com]
[ https://git-wip-us.apache.org/repos/asf?p=qpid-dispatch.git;h=152185e ]

DISPATCH-522 - Reduce the number of times the core thread invokes connection 
activation during times of high traffic volume.


> Performance: Defer activation and driver-awakening
> --------------------------------------------------
>
>                 Key: DISPATCH-522
>                 URL: https://issues.apache.org/jira/browse/DISPATCH-522
>             Project: Qpid Dispatch
>          Issue Type: Improvement
>          Components: Router Node
>            Reporter: Ted Ross
>            Assignee: Ted Ross
>             Fix For: 0.7.0
>
>
> The router-core thread processes batches of actions (the size of the action 
> list) when it begins its main loop.  When there is a large volume of traffic, 
> these batches can be quite large (over 1000 actions has been observed).  It 
> is likely that the large batches are settlement or disposition updates of 
> ranges of deliveries which Proton serializes into individual events.
> Each settlement action results in a connection activation.  This means that 
> for large batches, the same connection may be activated hundreds of times 
> during the processing of a single batch of actions.
> This improvement makes two significant changes:
>  - It defers the activations until after the processing of a batch, such that 
> each affected connection is only activated once.
>  - It holds off the awakening of the driver's poll loop until it has 
> activated all of the connections.
> This will result in far fewer calls into the driver by the core thread during 
> times of high traffic volume.



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