Basics - jMeterjMeter is an Open Source testing software. It is 100% pure Java application for load and performance testing.TITLE PAGE

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1Basics - jMeter

Shubelal Kumar

What is jMeter?Why jMeter?How jMeter Works? Test Plan Thread Group HTTP Request Sampler jMeter Useful ResourcesTopicsBasics - jMeter1-COLUMN

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*****Divider lines are not built into Master Slides must copy and paste from example slide*****3JMeter is a software allowing to load test or performance oriented business (functional) test on different protocols or technologies. Stefano Mazzocchi of the Apache Software Foundation was the original developer of JMeter. He wrote it primarily to test the performance of Apache JServ (Now called as Apache Tomcat project). Apache later redesigned JMeter to enhance the GUI and to add functional-testing capabilities.

The protocols supported by jMeter are:

Web: HTTP, HTTPS sites 'web 1.0' web 2.0 (ajax, flex and flex-ws-amf)Web Services: SOAP / XML-RPCDatabase via JDBC driversDirectory: LDAPMessaging Oriented service via JMSService: POP3, IMAP, SMTPFTP Service

What is jMeter?

Its free. Its an open source software.It has simple and intuitive GUI.JMeter can load and performance test many different server types: Web - HTTP, HTTPS, SOAP, Database via JDBC, LDAP, JMS, Mail - POP3It is platform-independent tool. On Linux/Unix, JMeter can be invoked by clicking on JMeter shell script. On Windows it can be invoked by starting the jmeter.bat file.It has full Swing and lightweight component support (precompiled JAR uses packages javax.swing.* ).JMeter store its test plans in XML format. This means you can generate a test plan using a text editor.It's full multi-threading framework allows concurrent sampling by many threads and simultaneous sampling of different functions by separate thread groups.It is highly Extensible.Can also be used to perform automated and functional testing of your application.

Why jMeter?

jMeter simulates a group of users sending requests to a target server, and return statistics that show the performance/functionality of the target server / application via tables, graphs etc. The figure below depicts this process:

How jMeter Works?

How JMeter Works

Test Plan : Only one test plan can be added per script. Saved for future use.

Thread Group: Represents one set of actions. Added under Test Plan and can simulate Multiple users with same set of actions.

HTTP Request Sampler : Records requests to web server and receives response.

Terminology

Samplers

Name: we will change the name to reflect the action what we want to achieveThis will will nameVisit Google Home Page

Server Name or IP: here we have to type the web server nameIn out case it ishttp://www.google.comNote http:// part is not written this is only the name of the server or its IP

Protocol: we will keep thisblankThat will mean we want HTTP as the protocol

Path: we will type path as/ (slash)This means we want the root page of the serverThis also means now the server will decide what page will be sent to us and it is the default page of the web site

HTTP Request SamplerListeners are used to view the results in the form of graph, tree, numbers

View Results Tree: Shows data for each item with details. Request, Response and Transaction status can be fetched through this listener

Summary Report: Entire Performance information, Simulated users and details in numbers for each user.

ListenersView Results Tree

Summary Report

Samples: A sample mean one sampler call. One request to web page in our case. It is web page requests to the page http://www.google.commade by Jmeter

Average: This value is the average time taken to receive the web pages.

Min and Max: These are the minimum and maximum value of time required for receiving the web page.

Std. Dev: This shows how many exceptional cases were found which were deviating from the average value of the receiving time. The lesser this value more consistent the time pattern is assumed.

Error %: This value indicated the percentage of error.Summary Report ContinuedThe WorkBench simply provides a place to temporarily store test elements while not in use, for copy/paste purposes, or any other purpose you desire. When you save your test plan, WorkBench items are not saved with it.

Include / Exclude Patterns on Proxy Server using the pattern .*\.html , GIF, JPG, etc

Set Target Controller where your script needs to be saved

Work Bench & HTTP Proxy ServerAssertions are used to perform additional checks on samplers, and are processed afterevery samplerin the same scope. To ensure that an Assertion is applied only to a particular sampler, add it as a child of the sampler.

The response assertion control panel lets you add pattern strings to be compared against various fields of the response. The pattern strings are: Contains, Matches,Equals, SubstringAssertionsResponse Assertion

CSV Data Set Config is used to read lines from a file, and split them into variables.When you need to check for multiple logins this feature can be used.

Parameterization

There are various timers that can be used in Jmeter.The most commonly used timer is the constant timer.If you want to have each thread pause for the same amount of time between requests, use this timer.

Timers

Once all of the above steps are done, run your script.

How to Run a script

Add a Test Plan -> Thread GroupAdd HTTP Proxy Server on WorkBench to include/exclude patternsAdd Listeners (View Results Tree, Summary Report), Assertions, timers if requiredStart Proxy Server and do settings on BrowserOpen the URL and record the scriptOnce done, stop the scriptSave your test planRun the test plan and view results

Basic Requirements to Run a scriptjMeter

http://www.tutorialspoint.com/jmeter/jmeter_overview.htmhttp://jmeter.apache.org/usermanual/build-web-test-plan.htmlhttps://jmeter.apache.org/usermanual/jmeter_distributed_testing_step_by_step.pdfhttp://blazemeter.com/blog/jmeter-tutorial-video-series

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