Testing and analysis tools ：JMeter & Jprofiler

Tool is introduced ：
1.Jprofiler yes IDEA The plug-in can monitor the operation of the software and grab data
2.JMeter You can start multiple threads to access and simulate concurrent access , Used to access the server 、 Network or object simulating huge load
Therefore, use the combination of the two tools to test the software performance .

How to install Jmeter and jprofiler

One 、 Basic index of performance test

1. Business indicators
2. System resource index

Resource utilization refers to when the system is under load , database server , application server ,web Server's cpu, Memory , Hard disk , External storage , The utilization rate of network bandwidth , lower than 20% The utilization rate of resources is stable ,60%-80% The utilization rate of indicates that the resource is saturated , exceed 80% The utilization rate of resources must be adjusted and optimized as soon as possible .

First step , With the help of Jprofiler obtain profiler（ Measure the running efficiency of the software ）

1. CPU Occupancy rate ： According to the flame diagram after the test , In the picture of fire , The longer the bars , Represents the more used , From bottom to top is call stack information .

2. according to cpu timeline You can clearly see how frequently an interface is called in this test .
   

Performance indicators 1：cpu Occupancy rate

Single point test , Simulate a single user operation user test Which method calls more frequently

Create multiple interfaces to access different methods , Simulate concurrency

Ramp-up Period（in seconds） Decide how long to start all threads . If you use 10 Threads ,ramp-up period yes 100 second , that JMeter use 100 Seconds make all 10 Threads up and running . Each thread will start after the previous thread 10 second （100/10） start-up .Ramp-up It needs to be long enough to avoid having too much workload when starting the test , And be small enough that the last thread starts before the first one completes . General Settings ramp-up= Number of threads started , And adjust it up and down to the required .

In this paper, the reference ：https://www.cnblogs.com/hjhsysu/p/9189897.html