How to Conduct Load Testing and Stress Testing

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System performance is assessed not only by load and stress tests. There are several other types of testing. They are used less often, but are nevertheless important for a comprehensive check of the application's operation:

stability testing - helps evaluate how the program copes with high workload over a long period of time;
Configuration testing - shows how performance is affected by different changes in the product configuration, such as using different types of load balancers.
Sometimes, scalability testing is also highlighted - checking how the system will work when scaled, for example, if it is adapted for a larger number of users.

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We will not go into detail about all possible test cases — we will only analyze the process as a whole. Load testing consists of several stages, which are basically valid for both load and stress testing. The difference is only in the details: for example, the goals and tools used may differ.

Studying the system. Before starting to write scenarios, testers collect all possible information about the system: what components it consists of, what terms describe it, and so on.

Defining the testing objectives. The specialists formulate why they will conduct the tests and what question they are going to answer with their help. For example, the goal may be to determine the maximum workload or to find “weak spots” in the system.