[JBoss-dev] Jmeter, Apache Web Server and JBoss Cluster: the response time grows!

[David Ward]

Max,

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Thank you,
David


Massimiliano Giraldo wrote:
> Hi all!
> 
> I'm testing (with JMeter) Apache Web Server with a cluster of two computers
> with JBoss (mod_jk for connection between Web Server and JBoss).
> I make requests to a simple servlet.
> I plan:
> - 1000 users;
> - 0 or 1 second of ramp-up;
> - 10 requests for each user.
> 
> I see that the response times sometimes get worse, reaching steps of 1.5
> seconds, 3 seconds and 9 seconds.
> 
> If I plan 5 or 10 seconds of ramp-up, the average response time is about 2-3
> ms (and it's ok!)
> If I plan 500 users and 0 seconds of ramp-up, the delay reaches 3 seconds
> (and it doesn't reach 9 seconds).
> 
> I suppose that there are some settings that limit the number of active
> threads (in Jmeter, Apache or JBoss) and therefore, when there are many
> active threads, some of them will be deferred.
> 
> Is it correct?
> Was anyone of you in this situation?
> Does anyone know which settings I need to modify to resolve my problem?
> 
> Thanks
> 
> Max
> 
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