Making a WCF SOAP service send X requests per second

Question

I'd like to know if there's a way to configure JMeter so that it send X request per second to my web-service.
The aim is simply to see what's going on with my service.

I am using JMeter-plugins with jp@gc - Ultimate Thread Group and jp@gc - Throughput Shaping Timer however it seems that I'm missing something since I never see on JMeter that I send X request per second.

I set up jp@gc - Throughput Shaping Timer for 5 request / second like this :

Start RPS : 5
End RPS : 5
Duration : 30 second

Then I set up jp@gc - Ultimate Thread Group still for 5 request / second like this :

Start Thread Count : 175
Initial Delay : 0 second
Start up Time : 0 second
Hold load for : 40 second
Shutdown time : 0 second

Do I do something wrong? Is there some simpler way?

Answer 1

Try using regular thread group instead of Ultimate one.

See :

• http://jmeter-plugins.googlecode.com/svn-history/trunk/examples/ThroughputShapingExample.jmx

Also read this:

• http://code.google.com/p/jmeter-plugins/wiki/ThroughputShapingTimer

How Many Threads I Need To Produce Desired RPS? Threads pool size can be calculated like RPS * / 1000. The more rate desired the more threads you will need. The more response time service have the more threads you will need. For example, if your service response time may be 2.5sec and target rps is 1230, you have to have 1230 * 2500 / 1000 = 3075 threads.