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From "robert huitema (JIRA)" <j...@apache.org>
Subject [jira] Created: (AMQ-1386) Very slow on Solaris/Linux when commiting transactions
Date Thu, 13 Sep 2007 06:49:22 GMT
Very slow on Solaris/Linux when commiting transactions
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                 Key: AMQ-1386
                 URL: https://issues.apache.org/activemq/browse/AMQ-1386
             Project: ActiveMQ
          Issue Type: Bug
    Affects Versions: 4.1.1, 5.2.0
         Environment: Solaris 10 on T2000, SUSE Enterprise linux 10 on DELL AMD64, Debian
testing on AMD Turion laptop, SUSE8 on DELL amd
            Reporter: robert huitema
         Attachments: JmsTestHarnessAMQ.java

All these systems show a very severe slowdown in TPS when each read is commited. this varies
with the system, but is generally 100 times less than when I commit every 1000 reads. I have
investigated and applied the fixes found so far, including the tcp_nodelay, net.ipv4.tcp_abc,
and misc system fixes. The problem exhibits across localhost and network, and on Seebeyonds
stcms IQManager. 

I have attached a test harness which should show the problem.

Summary of speeds:
localhost windows desktop PC:  commit 1000: 3900 tps, commit each:1300 tps
DELL AMD64:  commit 1000: 8000tps, commit each: 30tps
SunT2000: commit 1000:700tps, commit each; 15tps
linux laptop: commit 1000: 2500 tps, commit each: 200 tps

Hope you can help, we have been at this in depth for a while now :-(

rgds
rob

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