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From Koen Janssens <>
Subject Re: Attainable Load
Date Mon, 15 Oct 2001 08:26:39 GMT
I got some troubles as soon as i tried to use about 20 threads. This was
because i was testing a HTTP1.1 server (silverstream) using jmeter on JDK1.3.
The JDK1.3 does not seem to implement the HTTP1.1 protocol correctly. I got
around this by using good old jdk1.2 (which implements HTTP1.0) to run
jmeter.  Now I can get up to fifty threads. After that, weird things seem to
happen on the server. I think it has something to do whith the LDAP server
silverstream uses for authentication. It seems that this LDAP server likes to
take a lot of TCP connections, leading to random ServiceNotAvailable
exceptions. But this is ofcourse not a limitation of jmeter.

> I have run with up to 300 threads (on Solaris).  I think that I could get
> to 500 with some more tweaking,
> -----Original Message-----
> From: Tom Wang []
> Sent: October 11, 2001 3:21 PM
> To: Paul Devine;;
> Subject: RE: Attainable Load
> I would say 100 is more than enough for me to do concurrent user testing.
> -----Original Message-----
> From: Paul Devine []
> Sent: Thursday, October 11, 2001 12:16 PM
> To: Tom Wang;;
> Subject: Attainable Load
> I am curious what level of load people have attained with JMeter. I
> realize this is a somewhat open ended question depending on many factors.
> I'm curious on a realistic attainable number of truly overlapping requests
> to a server under test. At some point I assume JMeter will run into
> exceptions because the JVM will not give out any more socket connections
> due to JVM and/or OS level limits.     I've never had problems generating
> up to a hundred users in whatever I've tested so far.  (With other tools
> on Linux I've run into limits which seemed to be JVM/OS related but I
> can't recall what those limits were.)

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