How accurate are JMeter results

2
votes

I am using JMeter to test my web application. I am able to run test and can see results using various listener. To reduce resource when i run with more than 1000 thread i run jmeter in non gui mode and after completion of test view the result in graph mode. I want to know how accurate are Jmeter results(average/median response time). Let suppose if 1000 users are using my web application and they have response time of 20 ms. If i simulate 1000 users using JMeter and then see average ,median time in Jmeter. Since JMeter is creating lot of threads and has its own processing , is it possible that average/media response time in JMeter is higher than actual.

1
performancejmeterload-testing

1 Answers

1
votes

As with every load tool, you need to control your injector :

  • regarding OS config (tcp, system tuning ...)

  • machine power

  • injector runtime behaviour as of cpu, swap ...

If your injector is in good state, results will be accurate.

See: