how to keep steady number of users

Gatling (Open-Source)
1

Hello,

I am new to Gatling, I already have my scenario set up, which lasts about 40 sec per user. I need a simulation with steady number of users for specific period of time:

Ramp up to 100 users in 1 min, keep 100 users for 10 min, ramp down

Ramp up to 2500 users in 10 min, keep 2500 users for 2 hours min, ramp down

I tried to use constantUsersPerSec but unable to keep active users steady.

I do not want to use throttle, since this will keep RPS steady and not number of users.

Can anybody help with this? Or am I misunderstanding how injecting users works?

Thank You

RS

2

Check
Step No. 5: https://theperformanceengineer.com/2016/12/01/gatling-simulation-from-scratch-define-scenario/
Example 1 in Step 6: https://theperformanceengineer.com/2016/12/01/gatling-simulation-from-scratch-load-injection-pattern/

3

Hi CyberNinja, thank you for helping me on this, after reading provided example and some more about gatling, I believe I have a different use case.

I actually need to keep my TPS steady, not users. I have posted another question in this group, since this topic is different.
https://groups.google.com/forum/m/#!topic/gatling/ZIULVgs62aA

Please help me on that one too.
Thank You
RS

4

It’s the same. Keeping the number of users constant with fixed pacing for the desired duration would allow you to simulate the desired constant TPS.

Little’s law.