Just for the record, another option might be to look for the number of active sessions on your application servers (i.e in tomcat, look for session jmx metrics). It has a downside that if you have long session timeout - it will show you with high number of sessions, so you should understand sessions.
Another thing to keep in mind is that if you have a currently live system, you would like to define your load test otherwise than by number of active users. The other option is to configure the load test to get to a certain amount of throughput for different actions, this will result with a more close to real life load test scenario. i.e. if in the apache logs you can see the amount of homepage views per minute - you should define your load test to reproduce this behavior, and so for any other action. This is how I tend to create my load tests, when possible, I define a target of throughput per each simulated action and build my load test in a way which allow me to do so. Number of active sessions / users / jmeter threads - is also important (for concurrency), but it is not the only factor to consider. Shmuel Krakower. Beatsoo.org - re-use your jmeter scripts for application performance monitoring from worldwide locations for free. On Tue, Nov 27, 2012 at 2:06 PM, Flavio Cysne <[email protected]> wrote: > This answer, at StackExchange, may help you: > > http://webmasters.stackexchange.com/questions/24687/get-the-number-of-concurrent-users-in-apache > > > 2012/11/27 Enric Jaen <[email protected]> > > > Hello all, > > > > In order to create a concurrent scenario with JMeter as real as possible, > > I'd like to know previously what is the average concurrency access to > my > > website (based on historical data) > > > > I'd like to reach to a number such as for example, the average users > > accessing the website simultaneously is 100 > > (which will be the number of JMeter threads) > > > > > > I guess it must be based in the apache logs. I know about AwStats or > > 123LogAnalizer, but I don't think they provide such information. > > > > How do you obtain the concurrent number of users accessing a website? > Are > > you aware of any tool ? > > > > Regards, > > /Enric Jaen >
