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Posted to dev@qpid.apache.org by "Kim van der Riet (JIRA)" <ji...@apache.org> on 2011/04/07 22:38:05 UTC
[jira] [Commented] (QPID-3191) C++ broker performance: scaling subs
on single pub queue through direct exchange (mode 1-1-N) shows poor
performance
[ https://issues.apache.org/jira/browse/QPID-3191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13017135#comment-13017135 ]
Kim van der Riet commented on QPID-3191:
----------------------------------------
Proposed patch at https://reviews.apache.org/r/565/
> C++ broker performance: scaling subs on single pub queue through direct exchange (mode 1-1-N) shows poor performance
> --------------------------------------------------------------------------------------------------------------------
>
> Key: QPID-3191
> URL: https://issues.apache.org/jira/browse/QPID-3191
> Project: Qpid
> Issue Type: Bug
> Reporter: Kim van der Riet
> Assignee: Kim van der Riet
>
> Setting up a broker on one machine and qpid-perftest on another shows poor scaling of multiple subscribers to a single queue.
> Broker:
> ./qpidd --auth no -m no --max-connections 65100 --load-module /path/to/store/msgstore.so --store-dir /tmp --jfile-size-pgs 64 --num-jfiles 12 --log-enable info+
> Client:
> ./qpid-perftest --mode shared --summary --pub-confirm no --sync-publish no --sub-ack 0 -b 20.0.10.43 --npubs 1 --qt 1 --nsubs XX --count 1000000 (--durable yes)
> with XX being the progression ( 1 3 10 30 100 300 1000 3000 10000 )
> This test shows that the broker performance collapses from a peak of about 120k broker transfers/sec at 30 subs to 5k broker transfers/sec at 10000 subs. Analysis shows that the broker is spending most of its time adding and removing Consumer objects from the QueueListeners std::vector container at these higher sub levels. Additionally, several other improvements to the QueueListeners class can be made which would improve efficiency.
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