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JMeter Load Testing
JMeter Load Testing is a testing process done using a load testing tool named Apache JMeter which is open source desktop application based on Java. JMeter for load testing is a crucial tool that determines whether the web application under test can satisfy high load requirements or not. It also helps to analyse overall server under heavy load.
JMeter Performance Testing
JMeter Performance Testing is Testing method performed using Apache JMeter to test the performance of a web application. JMeter for performance testing helps to test both static and dynamic resources, helps to discover concurrent users on website and provides variety of graphical analysis for performance testing. JMeter performance testing includes load test and stress test of web application.
Apache JMeter testing tool offers following benefit in Performance Testing
JMeter can be used to test the performance of both static resources such as JavaScript and HTML, as well as dynamic resources, such as JSP, Servlets, and AJAX.
JMeter can discover maximum number of concurrent users that your website can handle
JMeter provides a variety of graphical analyses of performance reports.
JMeter Performance Testing includes:
JMeter Performance Testing includes:
Load Testing: Modeling the expected usage by simulating multiple user access the Web services concurrently.
Stress Testing: Every web server has a maximum load capacity. When the load goes beyond the limit, the web server starts responding slowly and produce errors. The purpose of the Stress Testing is to find the maximum load the web server can handle.
The figure below shows how JMeter load Testing simulates the heavy load:
Create a Performance Test Plan in JMeter
In this tutorial, we are doing a performance analysis of chúng tôi for 1000 users using various performance testing tools to ensure the website can handle the load and provide a seamless user experience.
Before testing the performance of target web application, we should determine-
Normal Load: Average number of users visit your website
Heavy Load: The maximum number of users visit your website
What is your target in this test?
Here is the roadmap of this practical example
Step 1) Add Thread Group
Start JMeter
Select Test Plan on the tree
Add Thread Group
In the Thread Group control panel, enter Thread Properties as follows:
Loop Count: 10 (Number of time to execute testing)
Ramp-Up Period: 100
The Thread Count and The Loop Counts are different.
Ramp-Up Period tells JMeter how long to delay before starting the next user. 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 seconds /100 users)
Step 2) Adding JMeter elementsNow we determine what JMeter elements in this test. The elements are
HTTP request Default
HTTP Request
In HTTP Request Control Panel, the Path field indicates which URL request you want to send to Google server.
Step 3) Adding Graph result
JMeter can show the test result in Graph format.
Step 4) Run Test and get the test result
Press the Run button (Ctrl + R) on the Toolbar to start the software testing process. You will see the test result display on Graph in the real time.
At the bottom of the picture, there are the following statistics, represented in colors:
Black: The total number of current samples sent.
Blue
: The current average of all samples sent.
Red
: The current standard deviation.
Green
: Throughput rate that represents the number of requests per minute the server handled
Let analyze the performance of Google server in below figure.
To analyze the performance of the web server under test, you should focus on 2 parameters
Throughput
Deviation
The Throughput is the most important parameter. It represents the ability of the server to handle a heavy load. The higher the Throughput is, the better is the server performance.
In this test, the throughput of Google server is 1,491.193/minute. It means Google server can handle 1,491.193 requests per minute. This value is quite high so we can conclude that Google server has good performance
The deviation is shown in red – it indicates the deviation from the average. The smaller the better.
The deviation is 2689, much higher than Google (577). So we can determine the performance of this website is less than a Google server.
NOTE: The above values depend on several factors like current server load at Google, your internet speed, your CPU power etc. Hence, it’s very unlikely that you will get the same results as above. So don’t panic! If you’re interested in understanding how server load impacts performance and how to test it, you might find this load testing tutorial useful.
Troubleshooting:If you face the issue while running the above scenario … do the following
Check whether you are connecting to the internet via a proxy. If yes, remove the proxy.
Open a new instance of Jmeter
Open the chúng tôi in Jmeter
Run the Test
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