multiply to get correct load

Gatling (Open-Source)
1

My load model is based on historic data stating that on the “top-hour” there are 1500 user doing the scenario per minute. I want to simulate this and I have this rationale:

During 1 minute my scenario should put through 1500 users. This means 25 user per second during 60 seconds (25*60=1500)

This again gives me this load model:

`

setUp(scn.inject(constantUsersPerSec(25) during (60 seconds))).protocols(httpConf)

`
however my scenario takes 4 seconds to complete in real-wordl.
Is it correct, then to multiply my load model by 4?
As in:

`

setUp(scn.inject(constantUsersPerSec(100) during (240 seconds))).protocols(httpConf)

`
Or does the first one work to simulate close to exactly what I want to simulate?

In my head a requirement that mean-responstimes should be x seconds given the load of 1500 user per minute could easliy be simulated (during 10 seconds) like the first load model:

`

setUp(scn.inject(constantUsersPerSec(25) during (60 seconds))).protocols(httpConf)

`

But then I am not taking into account the duration of 4 seconds.

2

Of course I mean in 60 seconds in the last sentence.

3

I doesn’t seem to me that the “scenario takes 4 seconds to complete” has anything to do with “there are 1500 user doing the scenario per minute”.