Showing posts with label jmeter. Show all posts
Showing posts with label jmeter. Show all posts

Monday, May 19, 2014

Selenium Integration With Jmeter...

Is Jmeter capable of doing Performance testing of an application with Selenium Scripts..?
Answer is yes, this is possible with Jmeter and Selenium Scripts written over in Junit.
  • Jmeter is having set of samplers of doing Different operations. For Integration we have sampler Known as "Junit Request", this can be used to execute tests written in Junit 3 or junit4 (Selenium)
  • A test Script written junit4 uses Junit annotations, below is the example of the Scripts which is written in Selenium Junit 4


For Total Script click on this Link....... Selenium_JunitScript

Once the Scripting is done , Export them as jar files .To export to jar files right click on the project folder -> select Export-> Expand Java folder -> Click on Jar files -> Click next -> select the resources to export -> check the option “Export java source files and resources”-> Choose destination -> finish



Copy the Jar file and paste it in the Junit folder under lib folder of Jmeter. Here is the path in my system “D:\apache-jmeter-2.9\lib\Junit”.

Before proceeding further, Download Selenium Standalone Server at this location “https://code.google.com/p/selenium/downloads/detail?name=selenium-server-standalone-2.39.0.jar
  • Copy the Selenium Standalone server jar file to the lib folder of Jmeter
  • Now open Jmeter, Create a Thread group{right click on testplan-> Select ADD-> Select Thread(users)-> Select Thread Group}
  • Create a "junit Request"{Right click on Thread Group-> Select Add-> Select Sampler-> Select Junit Request}
In the two drop downs (Marked as red) one could be the tests that are created using Junit4 i.e. by extending the Test Case class (Classname)

-          In order to see the tests that are created using Junit annotations, just check the check box “Search for Junit4 annotations” and drop downs would populated accordingly
-          Add the listeners to see the results{Right click on Thread group->Select Add-> Select Listener}
-          Select the test method we want to execute from the “Test Method” drop down and run the test(press Ctrl+R)
-          It will launch the browser and perform the actions as per the test scripts.
-          And finally we can view the results in the listeners. “View result tree in Table” and standard Deviation, Throughput, Mean, Average, Minimum and Maximum time that the samples took to execute could be noted from the “Summary/ Aggregate” reports.

The results are looks like below.........    :)




Wednesday, October 16, 2013

Jmeter Non GUI mode with HTML Reports

Running JMeter in command line mode is an option to carry out high number of concurrent users and obtain results.

STEP 1:
Go to bin folder of your JMeter installation from command prompt and type the following command:


        jmeter -n -t my-Scrtip.jmx -l sample.jtl -j <smaple.log>

Ex: jmeter -n -t D:\sampleScripts\script.jmx -l D:\sampleScripts\scriptresults.jtl

-n ------> Specifies Jmeter is to run in non GUI mode, 

-t ------> name of your test script jmx file (If you want u can Specify jmx file with location)
 -l------> name of jtl  
-j ----->  generate the log file for the execution

STEP 2 :

  after getting the JTL file , use the below command to generate the HTML report

    jmeter -g <sample.jtl> -o <folderpath>


After executing the above command, it will generate the HTML  in the desired path.. You can now view the results.......... :) 

Saturday, October 5, 2013

java.lang.OutOfMemoryError in jmeter......?



A java.lang.OutOfMemoryError is a subclass of java.lang.VirtualMachineError that is thrown when the Java Virtual Machine is broken or has run out of resources that are necessary to continue the operation of the Java Virtual Machine. Obviously, memory is the exhausted resource for a java.lang.OutOfMemoryError, which is thrown when the Java Virtual Machine cannot allocate an object due to memory constraints.


To overcome this issues while Jmeter Execution, increase heap memory of Jmeter, modify the line of code in jmeter.bat file.

Right Click on jmeter.bat file click on Edit 
and modify the line  
orginal :set HEAP=-Xms512m -Xmx512m 
modified : set HEAP=-Xms512m -Xmx1250m (For 32 Bit OS)

for 64 bit OS,the value wil change upto 102400,   

FYI: need to install jre for 64 bit in the system..

90% line in JMeter aggregate report....!


The 90th percentile response time value is the value for which 90% of the data points are smaller and 10% are bigger.

To calculate the 90th percentile value:
1.Sort the transaction instances by their value.
2.Remove the top 10% instances.
3.The highest value left is the 90th percentile.
Consider the below example:

There are 10 instances(response time) of transaction “sampler10” with the values


10Sec,5Sec,3Sec,9Sec,4Sec,3Sec,1Sec,7Sec,2Sec

Sort values from best to worst:

1 sec,2 sec,3 sec,4 sec,5 sec,6 sec,7 sec,8 sec,9 sec,10 sec

Remove top 10%, in our case i.e. value “10 sec”

1 sec,2 sec,3 sec,4 sec,5 sec,6 sec,7 sec,8 sec,9 sec

The highest value left is the 90th percentile value i.e. “9 sec” is the 90th percentile value.

Monday, July 8, 2013

Rendezvous Point In jmeter?



Rendezvous Point: Rendezvous point instruct VUsers to wait during test execution for multiple VUsers to arrive at a certain point, in order that they may simultaneously perform a task.

Rendezvous Point In jmeter:
By Using “Synchronizing Timer” we can overcome this problem.

Ex: We have a Scenario like Login into the Site doing some actions like booking the tickets and Sign-out from the site. So we want hit the Sever with large no.of Users at this Point “Booking the tickets”. We need to add “Synchronizing Timer” before the request. So that it will capture all the users at this point and released that users simultaneously on the Server. 

Process of adding Rendezvous Point in J meter: 

·         Add the Thread group to your Test plan mention Vuser count as”100”.


·         Add HTTP Request – Let’s hit http://www.google.com with 100 users.


·         Synchronizing Timer - Add this timer and enter '25' as the number of virtual users we want to send request to the server simultaneously.

·         View Result Tree - Use this listener to monitor the performance of the application.

·         Aggregate Report - Use this listener to see the overall performance.

        
     NOTE:Number of threads in the Thread Group should always be greater than the 'Number of Simultaneous Users to Group By' to make sure that Jmeter doesn't throw any unhandled exception.