Some Tips to Present the Results

After a load test, we will have found a lot of things. It's then time to present them to:

• Give an idea of response times and stability before going into production
• Allow Ops to fix configuration problems
• Allow developers to fix problems
• Ask for budget increases for hardware/licenses
• Inform the CTO and so on

But presenting numbers through a graph is not as easy as it seems.

To help us, let's look at some tips.

Don't Average Percentiles

Computing the average of percentiles is mathematically incorrect.

Be careful with the tool used to display results:

• Check whether it can compute the new percentile (see the Prefer Percentiles over Averages section for more details)
• Check how the tool proceeds with metrics if the screen resolution is too small to display all points

For more details, see Gil Tene's blog post called "You can't average percentiles. Period." (http://latencytipoftheday.blogspot.com/2014...