hard20 pts · first answer countsperformance-testingload-modelling

Fixed users hide slowdowns

A load test uses 100 virtual users that each send a request, wait for the reply and repeat. When the server slows from 200 ms to 2 s per request, the reported throughput drops but errors stay at zero. Why can this mislead the team?

A.Virtual users cannot measure latencyB.In a closed model, slower responses reduce the request rate, so the test applies less load exactly when the system struggles; real users keep arriving. An open model (for example k6 constant-arrival-rate) keeps the arrival rate fixedC.The test should use fewer virtual usersD.Throughput always drops in every load test, so it can be ignored

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Fixed users hide slowdowns

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