Structure of a Test Case

A test case can be divided into three parts.

Figure 3.25: Structure of a test case

Ramp-Up

A load test often has a so-called "ramp-up" period.

This period corresponds to the gradual arrival of virtual users on the target system.

A warm-up period allows both the target server and the injectors to:

• Warm up the just in time (JIT) compiler of the java virtual machine (JVM) injectors
• Warm up the JIT of the (JVM)/common language runtime (CLR) of the tested application
• Retrieve/initiate resources (database connections, brokers queues, and so on)
• Fill caches
• Initiate the mechanism of autoscaling
• Distribute loads in a uniform manner (load balancer and so on) and so on

Ramp-up is configured with the Thread Group parameters.

Figure 3.26: Ramp-Up

The arrival rate of users is calculated as follows:

• The ramp-up time divided by the number of units (VUs)

Example for 300 seconds duration with 100 users:

• Frequency...