Monitor Performance Graph analysis

[Patricia Dousseau <pd...@gmail.com>]

Hello :)

I have some doubts concerning the monitor performance graph. I've
performed some tests, and I come out with a graph like the one attached and
I was wondering why my thread line stays always "dead" and the health line
also doesn't change.

And what's the meaning of the load line? Nearer to 100% means that
it's overloaded?

Any help is appreciated,
Thank you,
Patricia

Re: Monitor Performance Graph analysis

[Peter Lin <wo...@gmail.com>]

sorry for the delay responding.

the tomcat monitor basically looks at the JVM stats exposed by Tomcat
manager webapp. It's not meant to used for profiling, just a quick health
check.

Here's the explanation of how it calculates the health

http://jmeter.apache.org/usermanual/build-monitor-test-plan.html

health uses the following calculation. I should state it's a rough estimate
of health, to get a true measurement requires detailed metrics at the
request level.

load = ( (busythreads/max threads) x 50) + ( (used memory/max memory) x 50)


On Fri, Feb 21, 2014 at 1:40 PM, Patricia Dousseau <pd...@gmail.com>wrote:

> Hi, Peter,
>
> Thank you for your reply. :)
>
> I'm using Tomcat 7, but it seems it's really getting data from tomcat. My
> server doesn't look dead, but I really don't understand why thread and
> health lines don't change.
>
> I'd like to understand better how to analyse this graph, I've searched on
> internet and I didn't find anything about it.
>
> I've found an example where the graph looks like mine:
> http://www.tutorialspoint.com/jmeter/pdf/jmeter_monitor_test_plan.pdf (the
> last graph in the last page).
>
> Thank you,
> Patricia
>
>
> 2014-02-21 12:53 GMT-03:00 Peter Lin <wo...@gmail.com>:
>
> > the monitor performance is meant to talk to tomcat's JMX and get the
> basic
> > stats it publishes.
> >
> > if the server looks dead, double check that it is actually getting data
> > from tomcat. I wrote that a long time back and it worked with tomcat 5
> and
> > 6. I don't know if it still works with newer releases of tomcat.
> >
> >
> > On Fri, Feb 21, 2014 at 10:47 AM, Patricia Dousseau <pdousseau@gmail.com
> > >wrote:
> >
> > > Hello :)
> > >
> > > I have some doubts concerning the monitor performance graph. I've
> > > performed some tests, and I come out with a graph like the one attached
> > and
> > > I was wondering why my thread line stays always "dead" and the health
> > line
> > > also doesn't change.
> > >
> > > And what's the meaning of the load line? Nearer to 100% means that
> > > it's overloaded?
> > >
> > > Any help is appreciated,
> > > Thank you,
> > > Patricia
> > >
> > >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: user-unsubscribe@jmeter.apache.org
> > > For additional commands, e-mail: user-help@jmeter.apache.org
> > >
> >
>

Re: Monitor Performance Graph analysis

[Patricia Dousseau <pd...@gmail.com>]

Hi, Peter,

Thank you for your reply. :)

I'm using Tomcat 7, but it seems it's really getting data from tomcat. My
server doesn't look dead, but I really don't understand why thread and
health lines don't change.

I'd like to understand better how to analyse this graph, I've searched on
internet and I didn't find anything about it.

I've found an example where the graph looks like mine:
http://www.tutorialspoint.com/jmeter/pdf/jmeter_monitor_test_plan.pdf (the
last graph in the last page).

Thank you,
Patricia


2014-02-21 12:53 GMT-03:00 Peter Lin <wo...@gmail.com>:

> the monitor performance is meant to talk to tomcat's JMX and get the basic
> stats it publishes.
>
> if the server looks dead, double check that it is actually getting data
> from tomcat. I wrote that a long time back and it worked with tomcat 5 and
> 6. I don't know if it still works with newer releases of tomcat.
>
>
> On Fri, Feb 21, 2014 at 10:47 AM, Patricia Dousseau <pdousseau@gmail.com
> >wrote:
>
> > Hello :)
> >
> > I have some doubts concerning the monitor performance graph. I've
> > performed some tests, and I come out with a graph like the one attached
> and
> > I was wondering why my thread line stays always "dead" and the health
> line
> > also doesn't change.
> >
> > And what's the meaning of the load line? Nearer to 100% means that
> > it's overloaded?
> >
> > Any help is appreciated,
> > Thank you,
> > Patricia
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: user-unsubscribe@jmeter.apache.org
> > For additional commands, e-mail: user-help@jmeter.apache.org
> >
>

Re: Monitor Performance Graph analysis

[Peter Lin <wo...@gmail.com>]

the monitor performance is meant to talk to tomcat's JMX and get the basic
stats it publishes.

if the server looks dead, double check that it is actually getting data
from tomcat. I wrote that a long time back and it worked with tomcat 5 and
6. I don't know if it still works with newer releases of tomcat.


On Fri, Feb 21, 2014 at 10:47 AM, Patricia Dousseau <pd...@gmail.com>wrote:

> Hello :)
>
> I have some doubts concerning the monitor performance graph. I've
> performed some tests, and I come out with a graph like the one attached and
> I was wondering why my thread line stays always "dead" and the health line
> also doesn't change.
>
> And what's the meaning of the load line? Nearer to 100% means that
> it's overloaded?
>
> Any help is appreciated,
> Thank you,
> Patricia
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@jmeter.apache.org
> For additional commands, e-mail: user-help@jmeter.apache.org
>