How to inject 10 users every 10 seconds until max users reached?

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Feng Yu

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Jan 6, 2017, 9:58:46 AM1/6/17

to Gatling User Group

Here is what I set:

    setUp(
        scn.inject(
            splitUsers(MAX_USERS_COUNT) into(
                atOnceUsers(10)
            ) separatedBy(10 seconds)
        ).protocols(httpProtocol)
    )

I find that MAX_USERS_COUNT must be multiples of ten, e.g 20,30,...40. 21 will just active 20 users. And If MAX_USERS_COUNT <= 10, e.g 1, will raise an error:

Exception in thread "main" java.lang.UnsupportedOperationException: There were no requests sent during the simulation, reports won't be generated
        at io.gatling.charts.report.ReportsGenerator.generateFor(ReportsGenerator.scala:48)
        at io.gatling.app.RunResultProcessor.generateReports(RunResultProcessor.scala:76)
        at io.gatling.app.RunResultProcessor.processRunResult(RunResultProcessor.scala:55)
        at io.gatling.app.Gatling$.start(Gatling.scala:61)
        at io.gatling.app.Gatling$.fromArgs(Gatling.scala:41)
        at io.gatling.app.Gatling$.main(Gatling.scala:33)
        at io.gatling.app.Gatling.main(Gatling.scala)

Any ideas?

Feng Yu

unread,

Jan 7, 2017, 1:37:59 AM1/7/17

to Gatling User Group

I find if-else could work:

    val injectStrategy = 
        if (USERS_COUNT > 10) {
            splitUsers(USERS_COUNT) into(rampUsers(10) over(5 seconds)) separatedBy(10 seconds) 
        } else {
            atOnceUsers(USERS_COUNT)
        }

    setUp(
        scn.inject(
            injectStrategy
        ).protocols(httpProtocol)
    )