Code360 powered by Coding Ninjas X Naukri.com. Code360 powered by Coding Ninjas X Naukri.com
Table of contents
1.
Introduction
2.
JMeter Performance Testing
2.1.
Advantages of Performance Testing
2.2.
Types of Performance Testing
2.2.1.
Load Testing 
2.2.2.
Reliability Testing 
2.2.3.
Stress Testing
2.2.4.
Volume Testing
3.
Performance Testing Using JMeter
3.1.
Setting up Apache JMeter
3.2.
Add Thread Group
3.3.
Adding JMeter Elements
3.4.
Adding Graph result
3.5.
Getting the test result
4.
Frequently Asked Questions
4.1.
What does the slash signify while entering the Path?
4.2.
Is the JMeter tool capable of simulating a real browser?
4.3.
Describe how JMeter works internally.
4.4.
What is the purpose of the Timer in JMeter?
4.5.
Does JMeter require coding?
5.
Conclusion
Last Updated: Mar 27, 2024

How to Use JMeter for Performance & Load Testing?

Master Python: Predicting weather forecasts
Speaker
Ashwin Goyal
Product Manager @

Introduction

Let's say we have the requirement to test a web server and check how many concurrent users it can handle. For that, we need a performance testing tool that generates and simulates many concurrent user loads on the web server.

JMeter Performance Testing

So are you also thinking that Apache Jmeter will be the suitable tool? Then yes, this is where Apache Jmeter comes to the rescue! 

Apache Jmeter

It is an open-source load and performance testing software based on Java Language. It was primarily written to load and test the performance of Apache JServ (also called the Apache Tomcat project). Later on, to add more features and functional testing capabilities, the Apache community redesigned it to enhance the GUI. 

Let's now discuss the method of performance testing using JMeter.

JMeter Performance Testing

It is a testing method performed using Apache JMeter to verify and validate the performance of a web application and other products' performance. It refers to testing software or a program under some specific workload and monitoring, which calculates whether its results are according to the expectations.

JMeter performance testing consists of load tests and stress tests of web applications.

Advantages of Performance Testing

In Jmeter, performance testing is done to test the software product's speed, response time, reliability, and resource usage. 

  • It identifies and eliminates any potential resistances to the software application.
  • JMeter can test the performance of static resources such as JavaScript, CSS, and HTML.
  •  JMeter is also used to test dynamic resources like- JSP, AJAX, JPA, Servlets, etc.
  • JMeter can determine the maximum number of user loads your website can handle.

Types of Performance Testing

JMeter performance tests are of several types. Some of them are mentioned below:

Types of Performance Testing

Load Testing 

This testing tests the applications for their performance at normal and peak usage. This performance may depend on response time and consistency on different user loads.

Reliability Testing 

Testing a system's reliability involves determining whether the web application will become normal again after an abnormal state. It calculates how long the system would take to return to its original state.

Stress Testing

There is a maximum load each web server can handle. The web server responds slowly and starts making faults when the load exceeds the limit. Hence stress testing is used to determine the maximum load that a web server can support.

Volume Testing

In this testing, the system's performance is checked concerning the volume of data. It enters a large amount of data into the database to perform the test.

Apart from these performance testing, scalability testing, and capacity testing are two other types of testing.

Let's now move to the simple process of creating a performance test plan.

Get the tech career you deserve, faster!
Connect with our expert counsellors to understand how to hack your way to success
User rating 4.7/5
1:1 doubt support
95% placement record
Akash Pal
Senior Software Engineer
326% Hike After Job Bootcamp
Himanshu Gusain
Programmer Analyst
32 LPA After Job Bootcamp
After Job
Bootcamp

Performance Testing Using JMeter

Let's say we want to test Google.com for 100 users. For this performance testing, we need to determine these three factors-

  • Your target in this test.
  • Normal Load: Average number of users visiting your website.
  • Heavy Load: The maximum number of users visiting your website will be tested.

So it's time to follow the steps for performance testing your desired website.

Step 1: 

Setting up Apache JMeter

The first step is to open the Apache JMeter folder->bin folder->JMeter .bat file. This will open the JMeter window on the screen.

Setting up Apache JMeter

Step 2:

Add Thread Group

Right click on Test Plan->Add->Thread(users)->Thread Group

Add Thread Group

Here, the thread group can be understood as the number of users. 

Now fill in the following thread properties in the thread group control panel.

  • Number of Threads: 100 (the number of users you want: 100).
  • Loop Count: 10 (Number of times the test will run for the number of users).
  • Ramp-Up Period(in seconds): 100 ( the time gap between the users' hits).

Step 3: 

Adding JMeter Elements

1) The first element we will add is HTTP Request Default.

Right-clicking on the Thread Group-> Add -> Config Element -> HTTP Request Defaults.

Enter the Website name(http://www.google.com) under test in the HTTP Request Defaults control panel.

2) Now, we will add the HTTP Request element.

Right-click on Thread Group-> Add -> Sampler -> HTTP Request.

Adding JMeter Elements

Here the path field indicates which URL request you wish to send to the Google server. Here, we will keep the Path field blank so that JMeter creates the URL request http://www.google.com to the Google server.

Step 4:

Adding Graph result

To get the test result in Graph format right, click on Test Plan-> Add -> Listener -> Graph Results.

Adding Graph result

Step 5:

Getting the test result

Press the Run button (Ctrl + R) to start the software testing process. You will see the test result displayed on the graph.

Must Read Sanity Testing vs Smoke Testing

 

Getting the test result

The snapshot below presents a graph of a test plan, where we have simulated 100 users who accessed on website www.google.com.

Once it receives the server's response, it collects them and visualizes those details in a chart or graph. In the given graph, every color represents a different statistic. 

Such as:

  • Black: Total number of current samples sent to the server.
  • Red: The current standard deviation.
  • Blue: Average of all the samples sent.
  • Green: Throughput rate( number of requests the server handled per minute).

 

To analyze the performance of web server(www.google.com) under test, you should focus on two parameters

  • Throughput

The throughput represents the ability of the server to handle a heavy load. The higher the Throughput is, the better the server performance.

In this test, the throughput of the Google server is 1,491.193/minute. It means the Google server can handle 1,491.193 requests per minute. This value is relatively high, so we can conclude that Google server has good performance

  • Deviation

The deviation is shown in red color– it indicates the deviation from the average. The smaller the deviation, the better it will be.

This result may depend on several factors like current server load at Google, your CPU power, your internet speed, etc. 

Must Read Apache Server

Frequently Asked Questions

What does the slash signify while entering the Path?

Writing Path as "/" (slash) suggests that we want the root page of the server.

Is the JMeter tool capable of simulating a real browser?

No, JMeter does not replicate or operate the same way as a genuine browser. It cannot render HTML responses as a real browser can.

Describe how JMeter works internally.

JMeter creates numerous threads that make simultaneous requests to a target server to simulate real-world user load. The server's performance is then displayed via tables and graphs.

What is the purpose of the Timer in JMeter?

JMeter can use a timer to delay the time between each request a thread makes. It is capable of resolving the server's overload issue.

Does JMeter require coding?

No, it does not require coding skills. If any script has to be created, that can be done using an inbuilt recorder.

Conclusion

This article discusses the various performance testing that can be done using the JMeter tool. We have discussed the step-by-step implementation of the process to perform JMeter Performance Testing.

To explore more on JMeter, here are more articles for rescue. 

 

Refer to our guided paths on Coding Ninjas Studio to learn more about DSA, Competitive Programming, JavaScript, System Design, etc. Enroll in our courses and refer to the mock test and problems available. Take a look at the interview experiences and interview bundle for placement preparations.
 

Previous article
How to use Assertions in JMeter?
Next article
Introduction to Rest Assured
Live masterclass