How to do a good job in performance testing?

hello, first of all, I appreciate your attitude. When I was recruiting new people at TestBird, many children felt that they knew how to use tools and how skilled the steps were, and they felt very good about themselves.

actually, I want to say that the focus of performance testing is not on learning performance testing tools.

Of course, you can also analyze the pressure points of the system, record the script with LR, set up users, do stress, analyze the results, and sort out the test report. Completed the whole process of performance testing. Then I say this performance test report is effective, but it is not necessarily useful.

why? Because in the performance test report, in your environment, you have measured such an effect. It's not adulterated. It's all true.

Why is it not necessarily useful? Do you know the system architecture? Do you know the operation mode and processing mechanism of database, middleware and front-end program? Do you know the network protocol? Know anything about the operating system? Are you familiar with the language of the development system, such as the internal mechanism of java JVM? These are all part of the system operation, which are affecting the performance of the system. If you don't know this, how can you make valuable and meaningful performance tests?

so, it's good to learn these performance testing tools, but this is only the first step. The performance results are just some data. Knowing what you are doing and why you are doing it, and giving something valuable after you finish it, is what you should practice slowly.