Running login operation 1/50 or 1/100 ratio of the total request in jmeter

Question

I am running some tests on JMeter. I am testing a web application and its functionality for example login, homepage, product catalogue. So I have a test script and I am using the ultimate thread group for the users. But I would like to run the login request only once or twice on every 100 requests. I know I can use if controller for that and I tried few solutions but did not work. So I would like to know how I can run requests properly?

Answer 1

You're supposed to share your "few solutions", otherwise it sounds like you're asking us to solve your problem.

If you want to run a Sampler 1 time per 100 iterations you can use the following __jexl3() function as the If Controller's condition:

${__jexl3(${__jm__jp@gc - Ultimate Thread Group__idx} % 100  == 0,)}

If you changed the Ultimate Thread Group label from default jp@gc - Ultimate Thread Group - you will need to change it in the function as well.

More information: 6 Tips for JMeter If Controller Usage

P.S. In majority if cases Throughput Controller is much easier to use

Answer 2

1. You can use Once Only Controller to run a request only once per thread/user
2. You can use Throughput Controller to run requests by the percentage of total execution or count
3. You can use Random Controller to randomly pick one item from the child requests
4. You can use If Controller with execution count check

${__groovy(vars.get("loginCount").toInteger() <=4  && (new Random()).nextBoolean() )}

You will have to set the loginCount variable for successful logins

int loginCount = vars.get("loginCount").toInteger().next()
vars.put("loginCount", loginCount.toString())

You need to ensure the login request is executed in the first iteration/loop. For the following iterations, you can randomly pick the login request using other appropriate logic controllers.

Also you can combine them to simulate complex combinations.