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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