Bug 790928

Summary: Broker needs better coalescing of outbound messages.
Product: Red Hat Enterprise MRG Reporter: Ken Giusti <kgiusti>
Component: qpid-cppAssignee: Ken Giusti <kgiusti>
Status: NEW --- QA Contact: Zdenek Kraus <zkraus>
Severity: low Docs Contact:
Priority: medium    
Version: DevelopmentCC: iboverma, jross, mcressma, zkraus
Target Milestone: ---   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: qpid-cpp-0.18-1 Doc Type: Bug Fix
Doc Text:
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On:    
Bug Blocks: 794748, 808134    

Description Ken Giusti 2012-02-15 18:24:44 UTC 
Description of problem:

Slight performance improvement. See upstream bugfix by Gordon:

https://issues.apache.org/jira/browse/QPID-3841
Comment 2 Zdenek Kraus 2013-01-24 17:40:54 UTC 
Results of performance measure by qpid-cpp-benchmark using qpid-send, qpid-receive on qpid-0.14-22 vs. qpid-0.18-13 shows:

RHEL 5.9 i686 and x86_64 have 3~20%, but mostly 10% performance boost, and in all cases they have positive improvement

on the other hand

RHEL 6.3 i686 have about -5% performance loss in most cases
RHEL 6.3 x86_64 have around 50:50 distribution of improvement and losses, thus I assume that the change has no real effect on performance

the measurements on RHEL 6.3 i686 and x86_64 was measured/runned twice to make check, both runs did show same results.

for RHEL6 this is not an improvement, moving back
-> ASSIGNED
Comment 3 Justin Ross 2013-01-28 14:50:06 UTC 
We're going to address this in the next release.
Comment 4 Zdenek Kraus 2013-01-31 13:49:55 UTC 
I've performed some additional performance measurement between upstream version of qpidd. Specifically between r1244503 and r1244504, that introduces the relevant change (https://reviews.apache.org/r/3897/diff/1/?file=74938#file74938line102). I we see no significant performance improvement nor loss.