Hi, Mathieu it is never a good idea to put "1 second" in the ramp-up. Even if your Jmeter server would be able to start 500 thread in a single second (I think you can do it with large server), you will end up with 500 threads generating their requests almost at the same time. This is a very, very worst case which probably will mess up your target server.
So, you can distribute the requests by setting a ramp-up time similar to your cycle time. As a second choice, you can add a linear random timer at the beginning of each thread. best regards Sergio Il 02/12/2011 16:59, Mathieu Seillier ha scritto:
Hello, I would like some clarification about the setup for my test plan. First of all, I explain quickly the behavior of my system : - Each user of the system performs operations on his station (heavy client) - One operation for one user includes data entry on the station and 5 requests to some web services of my system - so in my Jmeter script, my test plan contains 5 SOAP requests, and before each requests I have added 60sec timers, to simulate the work of a user on his station. - A complete operation for a user then takes about 5 minutes (1 min before each web service request). My system must support (max load) : - Up to 40,000 transactions / day - 1 day = 8 hours, so up to 5,000 operations / hour (no load peak, it is estimated that the operations are almost evenly distributed over the day) - About 500 simultaneous users (the number of users remains almost constant all day) - so, it gives 10 transactions per user per hour. For the number of threads, it's easy, it must equal 500 because it corresponds to the users of my system. On the other side, for the Ramp-up period, as I understand it's the time to reach the max number of users. In my case, the nb of users is almost the same all day, does that mean I have to put "1" for the ramp-up period ? Also how can I simulate a test day during 8 hours? Is the scheduler (with start time and end time) useful for that ? How do I set my script to set up 10 operations per user per hour ? Thank you for your help stieuma
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