It is best to analyze the indicators in Figure 1-2 first, and then analyze them comprehensively. Such steps are easier to understand and the ideas are clearer. Next, let's analyze it with Xiaobai. The analysis ideas are as follows.
1) The X axis represents the number of concurrent users, and the Y axis represents resource utilization, throughput, and response time. From left to right, the X-axis and Y-axis areas are the light pressure area, the heavy pressure area, and the inflection point area.
2) Then analyze one by one, and understand according to the performance terms and indicators learned earlier.As the number of concurrent users increases, the response time in the light pressure zone does not change much, it is relatively flat, and it shows a trend of growth after entering the heavy pressure zone. The slope rate increases after entering the inflection point area, and the response time increases sharply.
3) Next, look at the throughput. As the number of concurrent users increases, the throughput increases. After entering the heavy pressure zone, it gradually stabilizes, and after reaching the inflection point zone, it drops sharply.
4) Similarly, as the number of concurrent users increases, the resource utilization rate gradually rises and finally reaches saturation.
5) Finally, all indicators are merged together for analysis. As the number of concurrent users increases, the throughput and resource utilization rate increase, indicating that the system is actively processing, so the response time does not increase significantly and is in a relatively good state. However, as the number of concurrent users continued to increase, the pressure continued to increase, throughput and resource utilization reached saturation, and then the throughput dropped sharply, resulting in a sharp increase in response time. The junction of the light pressure zone and the heavy pressure zone is the optimal number of concurrent users of the system, because various resources are fully utilized and the response is fast; and the junction point of the heavy pressure zone and the inflection point zone is the maximum number of concurrent users of the system. Because beyond this point, the system performance will drop sharply or even crash.