Help Understanding the “Number of Concurrent Users” Chart

Gatling (Open-Source)
1

Hi everyone,

I’m having some trouble understanding what the Number of Concurrent Users chart in Gatling actually represents. I’ve checked the documentation, but the explanation there is quite brief, and I couldn’t find any detailed resources elsewhere.

In my recent test run, the concurrent users chart looked a bit strange — it stays flat toward the end instead of gradually dropping off as the scenarios finish. I’ve included a snippet of my injection profile and a screenshot of the test results below for reference.

Any insights or clarifications would be greatly appreciated!

Thanks in advance.

setUp(
   scn.injectOpen(
      rampUsers(60).during(60)
   )
).protocols(HttpConfig.httpProtocol);

image
image1280×474 27.2 KB

2

did you put any loop in scenario?

3

Yes, I have asLongAs loop in the scenario. Is it because of that?

4

Hello,

When posting in this category, you are presented with a template with a checklist so you can make sure you follow our prerequisites.
You have deleted this checklist instead of filling it.
In particular, you have deleted this one:

I made sure I’ve update my Gatling version to the latest release

I’m pretty sure this is your issue and you’re being bitten by a bug that’s already been fixed.

5

Hi,

I have updated the Gatling version to the latest version. Turns out it is the issue. Thank you for the help.

Ps: Will take note not to delete the checklist template in the future :smiley: