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List: grinder-use
Subject: Re: [Grinder-use] Grinder - No. Of Concurrent Users
From: Calum Fitzgerald <calum.fitzgerald () gmail ! com>
Date: 2009-05-18 8:05:54
Message-ID: 4acb0070905180105k35d4eadft4ba8ca2e8d737fbc () mail ! gmail ! com
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Hi,
I have a patch that sent out a couple of weeks or so back. I have send
this to your direct account...as gmail doesn't like attachments with
code...and it would probably be quicker...than posting it to the mail
list.
I hope to have version 1.2 out soon...I need to stop tinkering.
Cal
2009/5/18 Peter Courcoux <Peter.Courcoux@incisivemedia.com>:
>
> Hi Calum,
>
> I downloaded the Ground Report version 1.1 this week and think I might have
> a problem with http data and the concurrent users chart.
>
> You mentioned an error in this code and a patch.
>
> Is version 1.1 fixed? If not is there somewhere I can get the patched code
> from?
>
> Many thanks,
>
> Peter
>
>
> Calum Fitzgerald wrote:
> >
> > IMO as long as a user is only performing actions in a serial fashion
> > then the number of threads is analogous to the number of concurrent
> > users. (assuming that the user actions are contained within a single
> > thread). I think the picture becomes cloudier for more complex
> > scenarios
> >
> > you can increase the number of simulated users in various ways:
> >
> > 1. Increase the number of processes.
> > 2. Increase the number of threads within each process.
> > 3. Increase the number of agents, usually on different machines, just
> > another way of increasing the # processes
> >
> > Common practice seems to be to have 1 process per agent and to
> > increase the number of threads within that process until just before
> > you hit resource limits for the agent. If you need more simulated
> > users then you can scale hosizontally onto a different machine and use
> > another agent.
> >
> > With respects to Ground Report and concurrent users:
> >
> > The patched version you has makes use of a new approach for working
> > out the number of concurrent users, I found a fault assumption in the
> > old approach.
> > Simply put it works out when each thread starts and when each thread
> > stops. It then accumulatively adds up the number of started threads
> > and subtracts (accumulatively) the number of stopped threads along the
> > timeline of the test run. I have tested this with sample data scaling
> > up to 600 users and back down and am satisfied the approach works
> > however this test was with http data. If you can provide me with a
> > sample file with which you are having problems then I can see if it is
> > working as expected or if I have made typos in the norm data sql :-)
> >
> > Cheers
> > Cal
> >
> > 2009/4/27 Haritha_Dandu <Haritha_Dandu@satyam.com>:
> > > We can increase the number of users in three ways:
> > >
> > > 1. By increasing the number of threads as well as the number of
> > > runs
> > > together.
> > >
> > > 2. Increase only the number of threads.
> > >
> > > 3. Increase only the number of runs.
> > >
> > > The difference is that when we run the script using number of runs it
> > > will
> > > run the users sequentially whereas if we run the script using number of
> > > threads it will run the users concurrently.
> > >
> > >
> > >
> > > Thanks and Regards
> > >
> > >
> > >
> > > Haritha
> > >
> > >
> > >
> > >
> > >
> > > From: smiles [mailto:tsmiles3@gmail.com]
> > > Sent: Monday, April 27, 2009 6:37 AM
> > > To: grinder-use
> > > Subject: [Grinder-use] Grinder - No. Of Concurrent Users
> > >
> > >
> > >
> > > How should we increase the number of users in Grinder?
> > >
> > > Is it the # of Threads or # of Process.
> > > When i increase the # of threads and use the log file generated in ground
> > > report, i still see the number of users as 1 in the report.
> > >
> > > I was under the assumption that # of threads corresponds to # of
> > > concurrent
> > > users.
> > >
> > > Please clarify.
> > >
> > > Thanks
> > >
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> Sent from the Grinder - User mailing list archive at Nabble.com.
>
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