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: Refers to the use of various resources of the system, such as the CPU occupancy rate is 68%, the memory occupancy rate is 55%, generally use "resource actual use/Total resources available" to form resource utilization. 5, the calculation formula of thinking time Think time, from a business point of view, this refers to the time interval between each request when the user is doing the operation, and in order to simulate such a time interval, the concept of think time is introduced to simulate t
performance bottleneck positioning. Resource utilization: Refers to the use of various resources of the system, such as the CPU occupancy rate is 68%, the memory occupancy rate is 55%, generally use "resource actual use/Total resources available" to form resource utilization. 5, the calculation formula of thinking time Think time, from a business point of view, this refers to the time interval between each request when the user is doing the operation
PS: The following is the main concept and calculation formula of performance test, note: A System Swallowing metric elements: A system's swallowing metric (pressure-bearing capability) is closely associated with the request's CPU consumption, external interface, IO, and so on. The higher the CPU consumption of a single reqeust, the slower the external system interface and IO impact, the lower the system throughput
switching, memory consumption, and so on, caused the performance of the computer to degrade.The main factors that determine system response time are CPU operation, IO response speed, external interface response speed and so on.System Throughput Evaluation:When we do system design, we need to consider the impact of CPU, IO, External system response factors, as well as the preliminary estimation of system pe
Asked by friends to optimize the performance of things, today a simple summary:The general Java system, the overall model is as follows:Complex systems may have multiple application server tiers, and simpler systems may not have application serverIntuitively, the execution path of a user request is:Refinement to the internal of each server, the requested execution path is:For example, a business system, a request, CPU processing time of 20ms, read the
request, receives the server response, and ends the timer to calculate the elapsed and completed transactions, and at the end uses the information to estimate the score. The client uses the weighted covariance averaging method to calculate the client's score, and the test software uses this information from the client to calculate the overall TPS score on the se
request, receives the server response, and ends the timer to calculate the elapsed and completed transactions, and at the end uses the information to estimate the score. The client uses the weighted covariance averaging method to calculate the client's score, and the test software uses this information from the client to calculate the overall TPS score on the se
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