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From "robert huitema (JIRA)" <j...@apache.org>
Subject [jira] Commented: (AMQ-1386) Very slow on Solaris/Linux when commiting transactions
Date Thu, 13 Sep 2007 07:41:23 GMT

    [ https://issues.apache.org/activemq/browse/AMQ-1386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_40134
] 

robert huitema commented on AMQ-1386:
-------------------------------------

Details of OS and java:
uname -a:
Sun T2000 box = SunOS eaiksdev 5.10 Generic_125100-10 sun4v sparc SUNW,Sun-Fire-T200
DELL AMD64 box = Linux sapp0101 2.6.16.46-0.12-smp #1 SMP Thu May 17 14:00:09 UTC 2007 x86_64
x86_64 x86_64 GNU/Linux
Laptop = Linux 2.6.15-1-k7 i686

Java versions:
Sun T2000, 1.5.0_12-b04
DELL ANMD64, jre1.6.0_02 and  1.5.0_10-b03
Laptop, jre1.6.0_02, and jdk1.5.0_07

> Very slow on Solaris/Linux when commiting transactions
> ------------------------------------------------------
>
>                 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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