Performance bottleneck positioning XMIND

jmeter Is an excellent open source performance testing tool , Official website document address ：

Apache JMeter - User's Manual

One 、 advantage

1、 Open source tools , It's very scalable

2、 high scalability , Users can customize the debugging related module code

3、 Elaborate and simple GUI Design , Small and flexible

4、 Complete portability and 100％ pure java

5、 Completely swing And lightweight component support （ precompiled HAR Use javax.swing.*） package

6、 Fully multithreaded framework , It allows concurrent sampling through multiple threads and simultaneous sampling of different functions by individual threads

7、 Support script sampler

Two 、 Install and download

Here is a new jmeter Official website download address ：

Apache JMeter - Download Apache JMeter

jmeter It doesn't need to be installed , Just configure JDK Environmental Science , And then in jmeter In the document bin In file   open jmeter.bat File can

The latest version , Recommended configuration JDK It is best to 1.8 And above

3、 ... and 、 The basic structure

1、 Part of the

1） Load generator ： Generate load , Multi process or multi thread simulates user behavior

2）  User runner ：   The script runs the engine ,  The user runner is attached to a process or thread ,  Simulate the specified with... According to the script   Household behavior

3） Resource builder ： Build the server during the test 、 Load machine resource data

4） Report Builder ： Generate reports according to the data obtained in the test , Provide visual data display mode  ·

2、 Main concepts

2.1 test plan （test plan）

Describe a performance test , Including all relevant functions of this test

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2.2.threads（users） Threads

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Setup thread group：

A special type of thread , Can be used to perform pre test operations . That is, the execution of the regular thread group before the execution of the test Teardown thread group：

A special type of thread , Can be used to perform post test actions . That is, after the execution of the test, execute the regular thread group

The above two thread groups ,  for instance ：  loadrunner Script of except action Is the core content of the real script ,

And initialization “ Environmental Science ” The initialization script of and the corresponding script block of clearing information after the test , Corresponding to  Thread group：

Usually add the thread used ,  Generally, a thread group can be regarded as a virtual user group ,  Each thread is a virtual   user

2.3 Test piece （test fragment）

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2.5 An option added after version , Is a special thread group , On the test tree, there is a level with the thread group , but   It is not implemented , Unless it is a module controller or referenced by the controller, it will be executed

2.4 controller

Jmeter Yes 2 Kind of controller ： Sampler （sampler） And logic controllers （Logic Controller）

effect ： Use these components to drive a test

1） Sampler （Sampler）

Send request to server in performance test ,  Record response information ,  The smallest unit that records the response time , JMeter  primary   Students support many different sampler

Such as         HTTP  Request  Sampler  、        FTP     Request  Sampler  、

TCP  Request Sampler 、 JDBC Request Sampler  etc.

Every different type of   sampler  Different types of requests can be made to the server according to the set parameters .

Java Request Sampler  and   Beanshell Request Sampler  There are two special customizable   Of   Sampler  （ Don't talk about ）

2） Logic controller （Logic Controller）

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Contains two types of originals ：

One is control Test Plan in Sampler The logical sequence controller that the node sends the request ,  Commonly used ：  If Controller、 Swith Controller、 Loop Controller、 Random Controller etc.

another   One   class   yes   use   Come on   Group   weave   and   control   system  Sampler  section   spot   Of  ,  Such as  Transaction Controller 、 Throughput Controller etc.

2.5 Monitor （Listener）