Re: Performance graph of the Results Monitor Listener

[Noureddine BEKRAR <nb...@rennes.jouve.fr>]

Thank you Peter for your answer.

You said :
...
 memory - free memory/total used
...

What i want to know is which memory we speak about here : is it the total
used physical memory on the server or is it the memory used by the JVM or is
it the memory used by Tomcat or the memory used by the requests sent by
JMeter....


Noureddine


----- Original Message ----- 
From: "Peter Lin" <wo...@gmail.com>
To: "JMeter Users List" <jm...@jakarta.apache.org>; "Noureddine
BEKRAR" <nb...@jouve.fr>
Sent: Tuesday, February 28, 2006 5:33 PM
Subject: Re: Performance graph of the Results Monitor Listener


Since I wrote the sampler and documentation, I'll try to explain it the best
I can.

the performance graph has 4 lines.

health - this line is sort of arbitrary at the moment, but it basically
takes the load and threads to calculate health

load - combination of memory and threads

memory - free memory/total used

threads - busy/total threads


The expected behavior of the graph is the memory usage will show a regular
pattern. The red thread line should remain constant under constant load. if
the red line increases rapidly, it means there's threading issues in the
webapp.

the load should show a regular pattern under constant load, since it is a
combination of memory and thread stats.

hope that helps

peter


On 2/28/06, Noureddine BEKRAR <nb...@rennes.jouve.fr> wrote:
>
> Hi,
>
> Can you please tell me which memory is monitored in the "performance
> graph" of the "monitor results listener", is it the size of the used
memory
> for the JVM or is it the memory used by Tomcat.
> This is the -not enough clear- explanation about this subject in the
> "Building Monitor testplan"
>
> http://jakarta.apache.org/jmeter/usermanual/build-monitor-test-plan.html :
>
>
> ... The performance graph shows for different lines. The free memory line
> shows how much free memory is left in the current allocated block. Tomcat
5
> returns the maximum memory, but it is not graphed. In a well tuned
> environment, the server should never reach the maximum memory...
>
>


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