Performance testing of software testing

1. Concept

        Performance testing is Using tools , Simulate different scenarios , Test and evaluate the performance indicators of the software .

2. Scope of software performance test

        web Applications 、 database 、 Server resources (CPU、 Memory 、 disk 、 The Internet )

3. Purpose of performance test

         Assess current system capabilities , Get key performance indicators ; Compare with similar software ; Find performance bottlenecks , Optimize performance ; Evaluate whether it meets future performance requirements .

4. Performance test and function test

        Functional testing focuses on software functions , Demand is satisfied

        Performance testing focuses on the satisfaction of software business scenarios

        Software function test and performance test are carried out

        After passing the function test , In performance testing

5. Performance test categories

    The benchmark ： A small number of users conduct business scenario testing , And count the performance indicators , As a reference for subsequent tests .

    The load test ： By gradually increasing the system load , Test for changes in system performance , On the premise of meeting the performance index , Test of the maximum load that the system can bear .

                  Optimum load ： The maximum load without exceeding the index

                  Maximum load ： The load when the throughput is maximum

    Stability test ： The server runs stably ( Normal business load ) Under the circumstances , Conduct a long test , Ensure that the server can run normally .

    Pressure test ： In certain software and hardware , Under the network condition , Simulate high concurrency of users ( Peak load ), For a while , Test various performance indexes of the system , Focus on the performance of the system at peak .

6. Performance indicators

response time ： In certain software and hardware , Under the network condition , Simulate high concurrency of users ( Peak load ), For a while , Test various performance indexes of the system , Focus on the performance of the system at peak

Concurrency number : Number of system users   User registration

            Number of online users    Number of users accessing the system over a period of time ( Diurnal activity )

            Number of concurrent users     The number of users accessing the system at a certain time

throughput ：QPS  The number of requests processed by the server per second

              TPS   The number of transaction requests processed by the server per second

              A transaction may contain multiple requests ( Home page display , Need pictures 、 Interface )

6. Performance testing process

      1、 Demand analysis

             Attribute the business and architecture of the system under test

            Define the test content , Select core business for testing , Test the business with complex logic

            Determine performance test indicators
              - Demand : Test as needed
              - There is no demand : Comparison of the same type of software , Estimate future data

      2、 Performance test plan   

            In terms of template content , Basically consistent with the functional test , The main thing is to write clearly who will do 、 How to do and   primary coverage

      3、 Performance test cases

      4、 Use case review

      5、 Performance test execution    Performance test environment

      6、bug Submit and track  

             Performance analysis and tuning

               - The tester only needs to determine whether there is performance bug, Yes bug Then submit a defect report  
               - Problem analysis and tuning are done by developers , Testers cooperate to verify the tuning results ( Multiple rounds of validation may be required )

      7、 Performance test report