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From "Andrew Stitcher" <astitc...@apache.org>
Subject Re: Review Request: QPID-3280: When sending a large number of messages with nonzero TTLs to a cluster, overall message throughput drops by around 20-30% compared to messages with TTL 0.
Date Fri, 27 May 2011 16:59:51 GMT

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https://reviews.apache.org/r/791/#review731
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/trunk/qpid/cpp/src/qpid/sys/Timer.cpp
<https://reviews.apache.org/r/791/#comment1476>

    As my previous comment I think this test should now be:
    
      if (period && fired) {
    
    And as this seems to be the only user of readyToFire() it could be removed
    
    However I think this might be the wrong behaviour in any case.
    
    If a periodic event is preempted by the elder why isn't the elder going to preempt the
next firing too. In other words why are we setting up a next firing on the local timer when
the elders timer is going to do the work for us?


- Andrew


On 2011-05-26 20:53:00, Alan Conway wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/791/
> -----------------------------------------------------------
> 
> (Updated 2011-05-26 20:53:00)
> 
> 
> Review request for qpid, Andrew Stitcher, Alan Conway, and Gordon Sim.
> 
> 
> Summary
> -------
> 
> QPID-3280: When sending a large number of messages with nonzero TTLs to a cluster, overall
message throughput drops by around 20-30% compared to messages with TTL 0.
> 
> Replaced the complicated message expirly logic in the cluster with a simpler "cluster
clock" for expiry of messages with TTL.
> 
> Patch supplied by Andy Goldstein <agoldste@redhat.com>.
> 
> 
> Diffs
> -----
> 
>   /trunk/qpid/cpp/src/qpid/broker/Broker.cpp 1128002 
>   /trunk/qpid/cpp/src/qpid/broker/ExpiryPolicy.h 1128002 
>   /trunk/qpid/cpp/src/qpid/broker/ExpiryPolicy.cpp 1128002 
>   /trunk/qpid/cpp/src/qpid/broker/Message.cpp 1128002 
>   /trunk/qpid/cpp/src/qpid/broker/QueueCleaner.h 1128002 
>   /trunk/qpid/cpp/src/qpid/broker/QueueCleaner.cpp 1128002 
>   /trunk/qpid/cpp/src/qpid/cluster/Cluster.h 1128002 
>   /trunk/qpid/cpp/src/qpid/cluster/Cluster.cpp 1128002 
>   /trunk/qpid/cpp/src/qpid/cluster/ClusterPlugin.cpp 1128002 
>   /trunk/qpid/cpp/src/qpid/cluster/ClusterSettings.h 1128002 
>   /trunk/qpid/cpp/src/qpid/cluster/Connection.h 1128002 
>   /trunk/qpid/cpp/src/qpid/cluster/Connection.cpp 1128002 
>   /trunk/qpid/cpp/src/qpid/cluster/ExpiryPolicy.h 1128002 
>   /trunk/qpid/cpp/src/qpid/cluster/ExpiryPolicy.cpp 1128002 
>   /trunk/qpid/cpp/src/qpid/cluster/UpdateClient.cpp 1128002 
>   /trunk/qpid/cpp/src/qpid/sys/Timer.h 1128002 
>   /trunk/qpid/cpp/src/qpid/sys/Timer.cpp 1128002 
>   /trunk/qpid/cpp/xml/cluster.xml 1128002 
>   /trunk/qpid/python/examples/api/spout 1128002 
> 
> Diff: https://reviews.apache.org/r/791/diff
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> Alan
> 
>


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