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From "Márcio Moraes" <mmoraes...@gmail.com>
Subject Re: [jira] Created: (AMQ-1387) Potential message size performance issue
Date Fri, 14 Sep 2007 18:46:29 GMT
Witch persistence are you using? derby? Journal?

2007/9/14, Bob Tillson (JIRA) <jira@apache.org>:
>
> Potential message size performance issue
> ----------------------------------------
>
>                  Key: AMQ-1387
>                  URL: https://issues.apache.org/activemq/browse/AMQ-1387
>              Project: ActiveMQ
>           Issue Type: Bug
>           Components: JMS client
>     Affects Versions: 4.1.1
>          Environment: RHEL4 Update 4 x86_64, Java 1.6.0_02, 3.6 GHz Xeon,
> 4GB RAM, 2 Dual core ( 4 core total )
>             Reporter: Bob Tillson
>
>
> I have a JNI client that interfaces to JMS.
>
> Tested previously on JBOSS and JORAM; functionally correct and performs
> adequately.
>
> "Porting" to activeMQ.  No coding changes, just use different jar file as
> all through generic interfaces.
>
> So far so good...
>
> Start testing, have publisher and subscriber apps for testing.
>
> publisher can vary message size, so start at 16 bytes, and double message
> size up to 1MB for basic functional verification using ActiveMQ 4.1.1.
>
> publisher transmist message "as fast as possible", no sleeps.
>
> Everything seems reasonable up til about 4KB messages; at 4KB, get ~ 4200
> msgs/sec, seems reasonable vs other paltforms; using large amounts of CPU,
> but that is OK.
>
> 8K message size, only get 25 msgs per second throughput.  Seems to be a
> magic number.
>
> Above 8K, message throughput drops, but also CPU usage drops considerably
> on publisher, subscriber, and server.  at 64K, less that 80 msgs per sec
> throughput...
>
> Server cpu dropping not suprising cause many less messages being pushed
> through.
>
> The real issue is why is the publisher CPU dropping.  It is consistently
> below 10 percent.
>
> At 128K message size, speed is a bit faster close to 100 msgs per sec.
>
> Seems like there is some REALLY werid stuff going on in the client side...
>
> Has anyone lese run into this?
>
> Am I just freakin crazy?  Especially the 8K message size and then the
> bigger the message, the faster is gets...
>
> --
> This message is automatically generated by JIRA.
> -
> You can reply to this email to add a comment to the issue online.
>
>

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