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scalaperformancegatling

What cause a "Spike Load" in Load Testing?


I am a new user to Gatling and Scala, I have tried to set up a script and send to reqres.in, however when I check the report, there seems to be some spike load as below Graph

What/Why these spikes appear and how does it affect the load testing analysis, any help would be appreciated.

Try to change to some lower traffic size.


Solution

  • First, there's no spike in your chart, just some minor variations.

    Then the charts in the free reports display an "active user" metric, not started users nor concurrent users.

    The variations are just some artifacts because of when users get started and terminate compared to the bounds of each second bucket.