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From Jordi Salvat i Alabart <jsalv...@atg.com>
Subject Re: bottleneck on JMeter clients - distributed test
Date Mon, 16 Feb 2004 10:35:07 GMT
I've seen very bad performance with HTTPS. Maybe not as bad as you're 
observing, but I can't tell. Do you have the possibility of repeating 
your test on HTTP, just for diagnostic purposes?

-- 
Salut,

Jordi.

Angel Orts wrote:
> Hi all,
> 
> I'm getting a bottleneck on my JMeter clients when running distributed 
> tests over 48 concurrent threads.
> 
> Scenario:
> 
> Hw:
> - 3 clients + 1 JMeter console (4 nodes total)
> - Each node: Pentium IV 2.4 GHz processor, 1 MB RAM
> 
> Sw:
> W2K SP4
> JMeter 1.9.1
> SUN JRE 1.4.2
> 
> JMeter 1.9.1 test:
> - Default JMetet.properties for all 3 clients.
> - Single thread group
> - 23 HTTP Request samplers (JSPs, GIFs, JSs, servlet calls)
> - 10 customized user logins (User Parameters)
> - "Retrieve all images and java applets" option unchecked.
> - "Functional test mode" option unchecked
> - No listeners enabled (just to rule them out)
> - Small throttle (constant timer of 100 ms for each sampler)
> - HTTPS protocol
> 
> Client CPU usage reaches 100% with only 48 concurrent threads, which is 
> far too low for test requirements. Even with Graph results and Aggregate 
> report listeners enabled, clients get saturated before JMeter console does.
> 
> I tried with different JRE implementations (IBM's 1.4.1, W2K's) with 
> similar behaviour. My questions are:
> 
> 1- Is this a normal behaviour for JMeter? I would expect JMeter console 
> to saturate before clients do when listeners are enabled. Besides, 48 
> concurrent clients seems a bit low to me.
> 2- How could I increase concurrency without increasing the number of 
> client nodes or raising throttle?
> 
> _________________________________________________________________
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> 
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