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From "Jason Dillaman (JIRA)" <j...@apache.org>
Subject [jira] [Created] (QPID-4287) Poor performance when a priority queue with a ring queue policy has a large backlog
Date Wed, 05 Sep 2012 20:33:08 GMT
Jason Dillaman created QPID-4287:
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             Summary: Poor performance when a priority queue with a ring queue policy has
a large backlog
                 Key: QPID-4287
                 URL: https://issues.apache.org/jira/browse/QPID-4287
             Project: Qpid
          Issue Type: Bug
          Components: C++ Broker
    Affects Versions: 0.18
            Reporter: Jason Dillaman


The ring queue policy utilizes a single deque to store messages in priority and FIFO order.
 When inserting messages of mixed priority into a queue with a large (>100,000) message
backlog, the performance degrades quickly enough to potentially block all broker worker threads
if they all are publishing to the same queue.  Recommend separating the ring queue data structure
into separate deques based upon message priority in order to avoid the potential for reshuffling
the deque with each incoming message.

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