How to setup the environment for JMeter

1. Need Java Installation-

  • 1st requirement for JMeter to install the java in your machine.
  • Download the JDK and install in your machine.
  • To check that JDK is installed in your system or not
    – Window- c:\> java –version
    – Linux- $ java -version

2. Download JMeter

3. Now start the work with JMeter

  • For Windows – To run the jmeter.bat file from the bin folder.
  • For Linux – To run the jmeter.sh file from the bin folder.

After run the file it should be shown like as-

Test Plan 1

*********Now enjoy the load and performance testing with JMeter**********

Uses of Controllers in JMeter

JMeter has two types of Controllers:

  1. Samplers
  2. Logic Controllers

1. SAMPLERS:

  • Samplers allow JMeter to send specific types of requests to a server.
  • They simulate a user’s request for a page from the target server.
  • For example, you can add a HTTP Request sampler if you need to perform a POST, GET, DELETE on a HTTP service
  • Some useful samplers are:
    – HTTP Request
    – FTP Request
    – JDBC Request
    – BSF Request
    – SOAP/XML Request
    – RPC Requests
FTP Request:
This controller lets you send an FTP “download file” or “upload file” request to an FTP server.

FTP
For example, if you want to download a file “Test.txt” from a FTP server under test, you need to configure some parameters in JMeter as figure below-

FTP Request

JMeter will send FTP command to FTP server ftp.example.com, and then download a file Test.txt from that server.

HTTP Request:
  • This sampler lets you send an HTTP/HTTPS request to a web server.
  • JMeter send a HTTP request to Google website and retrieve HTML files or image from this website.

HTTP Reuquest

JDBC Request:
  • This sampler lets you execute Database Performance Testing. It sends a JDBC Request (an SQL query) to a database.

JDBC Request

For example, a database server has a field test result stored in a table name test_tbl. You want to query this data from the database server; you can configure JMeter to send a SQL query to this server to retrieve data.

JDBC Request 12. LOGIC CONTROLLERS:

  • Logic Controllers let you control order of processing of Samplers in a Thread.
  • Logic Controllers can change the order of request coming from any of their child elements.
  • Some examples are: For Each Controller, While Controller, Loop Controller, IF Controller, Run Time Controller, Interleave Controller, Throughput Controller, and Run Once Controller.
  • A Loop Controller Control Panel looks like the following figure:

Logic Controller

The following list consists of all the Logic Controllers JMeter provides:

  • Simple Controller
  • Loop Controller
  • Once Only Controller
  • Interleave Controller
  • Random Controller
  • Random Order Controller
  • Throughput Controller
  • Runtime Controller
  • If Controller
  • While Controller
  • Switch Controller
  • For Each Controller
  • Module Controller
  • Include Controller
  • Transaction Controller

Listeners:

  • Listeners: shows the results of the test execution.
  • They can show results in different format such as tree, table, graph or log file

The following list consists of all the Listeners JMeter provides:

Listener

listenere1

Timers:

  • By default, a JMeter thread will send requests without pausing between each sampler.
  • This may not be what you want. We can add a timer element which will allow us to define a period to wait between each request.

Timer

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What is Thread Group in the Jmeter ?

Thread group in the Test Plan- 

Thread Group: A test plan must have at least one thread group.

Add Thread Group Thread Group

 

Number of Threads (users): Simulates the number of user(s) or connection(s) to your server application.
Or
Number of Threads: 100 (Number of users connects to target website: 100)

Loop Count: Defines the number of times to execute the test.
Or
Loop Count: 10 (Number of time to execute testing)

Ramp-Up Period: It tells JMeter how long to delay before starting next user.
Or
Ramp-Up Period: 100

For example, if we have 100 users and a 100 second Ramp-Up period, then the delay between starting users would be 1 second (100 users /100 seconds)

Delay request

 

Scheduler checkbox: Once selected, the Scheduler Configuration section will appear at the bottom of the control panel.

Scheduler Configuration: You can configure the start and end time of running the test.

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Introduction to Apache JMeter Performance Testing

Introduction to Apache JMeter:  JMeter works only on two fields:

  1. Test Plan
  2. Workbench

Test Plan and workbench

1.Test Plan:

  • Test Plan defines what to test and how to execute no of steps in jmeter.

For ex: Web application as well as the client server application. It can be viewed as a container for running tests.

  • A test plan must have at least one thread group.
  • A complete test plan will consist of one or more elements such as
  • Thread groups
  • Logic controllers
  • Sample-generating controllers
  • Listeners
  • Timers
  • Assertions
  • Configuration elements.

2.Workbench:

  • It’s Provide a place to store test elements temporarily.
  • JMeter doesn’t save the content of workbench.
  • JMeter only save the content of Test Plan.
  • No relation with the Test Plans.