Load testing best practices for QA

Repeatable, comparable, shareable.

What are load testing best practices?

Test from your real peak concurrency upward, hold every variable except the build constant between runs, compare against a stored baseline, read percentiles rather than averages, and run from the regions your users are actually in.

Can I reuse my existing JMeter scripts?

Yes. Upload your JMeter test plans and run them from the cloud without maintaining your own load generators.

What is ramp-up time and why does it matter?

Ramp-up is how quickly virtual users are added. Adding them instantly tests a thundering herd, adding them gradually tests sustained load. They surface different failures, so the choice should be deliberate.

Should I look at average or percentile response time?

Percentiles. An average is dragged down by the many fast responses and hides the slow tail, and the slow tail is what a user experiences as the site being broken.

How do I make a load test reproducible?

Fix the regions, virtual user count, ramp-up and duration, store the run, and compare later runs against it as a baseline rather than against a remembered figure.

Can I share a result with a developer who has no account?

Yes. Results can be exported as a PDF report and shared, so a fix conversation starts from the same numbers.