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https://issues.apache.org/jira/browse/QPID-3687?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rob Godfrey updated QPID-3687:
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Status: Ready To Review (was: In Progress)
> [Java Broker] Performance Improvements - Enqueuing/Dequeing
> -----------------------------------------------------------
>
> Key: QPID-3687
> URL: https://issues.apache.org/jira/browse/QPID-3687
> Project: Qpid
> Issue Type: Improvement
> Reporter: Rob Godfrey
> Assignee: Rob Godfrey
>
> Reviewing the performance characteristics of the Java Broker showed a number
> of opportunities for improvement.
> this JIRA covers
> 1) Reducing the creation of QueueRunners/SubFlushRunners so that only one
> object is created per queue/subscription and is simply rescheduled if need be
> 2) Increase the number of messages processed by each async loop from 10 to 40
> 3) Detecting at the point of enqueue whether the queue is an exclusive queue
> (likely a topic) or whether asynchronous delivery is already taking place.
> In this case we can skip over the attempt to deliver synchronously on enqueue.
> 4) Allow the deferring of flushing the send buffer to the network until the
> entire incoming buffer has been processed. By flushing for every message
> delivered we were being needlessly inefficient for small message sized - by
> allowing the flush to be called only at the end of processing the incoming
> data we retain the same guarantees, but allow more efficient IO
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