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Performance Testing with JMeter  3
Performance Testing with JMeter  3

Performance Testing with JMeter 3: Enhance the performance of your web application , Third Edition

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Performance Testing with JMeter 3

Recording Your First Test

JMeter comes with a built-in test script recorder, also referred to as a proxy server (http://en.wikipedia.org/wiki/Proxy_server), to aid you in recording test plans. The test script recorder, once configured, watches your actions as you perform operations on a website, creates test sample objects for them, and eventually stores them in your test plan, which is a JMX file. In addition, JMeter gives you the option to create test plans manually, but this is mostly impractical for recording nontrivial testing scenarios. You will save a whole lot of time using the proxy recorder, as you will see in a bit.

So, without further ado, let's record our first test! For this, we will record the browsing of JMeter's own official website as a user would normally do. For the proxy server to be able to watch your actions, it will need to be configured. This...

Configuring the JMeter HTTP(S) Test Script Recorder

The first step is to configure the proxy server in JMeter. To do this, we perform the following steps:

  1. Start JMeter.

 

  1. Add a thread group, as follows:
    1. Right-click on Test Plan and navigate to Add | Threads (User) |
      Thread Group.
    2. Right-click on Thread Group and navigate to Add | Logic Controller | Recording Controller.
  2. Add the HTTP(S) Test Script Recorder element, as follows:
    • Right-click on WorkBench and navigate to Add | Non-Test Elements | HTTP(S) Test Script Recorder.
  3. Change the port to 7000(1) (under Global Settings).
  4. You can use a different port if you choose to. What is important is to choose a port that is not currently used by an existing process on the machine. The default is 8888.
  5. Under the Test plan content section, choose the Test Plan>Thread Group (2)> Recording Controller option from the Target...

Setting up your browser to use the proxy server

There are several ways to set up the browser of your choice to use the proxy server. We'll go over two of the most common ways, starting with my personal favorite, which is a browser extension.

Using a browser extension

Google Chrome and Firefox have vibrant browser plugin ecosystems that allow you to extend the capabilities of your browser with each plugin that you choose. For setting up a proxy, I really like FoxyProxy (http://getfoxyproxy.org/). It is a neat add-on to the browser that allows you to set up various proxy settings and toggle between them on the fly, without having to mess around with setting systems on the machine. It really makes the work hassle-free. Thankfully...

Anatomy of a JMeter test

With the samples we have explored so far, we have seen a similar pattern emerging. We have seen what mostly constitutes a JMeter test plan. We'll use the remainder of this chapter to explore the anatomy and composition of the JMeter tests.

Test plan

This is the root element of the JMeter scripts and houses the other components, such as threads, config elements, timers, Preprocessors, Postprocessors, assertions, and listeners. It also offers a few configurations of its own.

First off, it allows you to define user variables (name-value pairs) that can be used in your scripts later. It also allows the configuration of how the thread groups that it contains should run, that is, should thread groups...

Summary

We have covered quite a lot in this chapter. You learned how to configure JMeter and our browsers to help record test plans. In addition, you learned about some built-in components that can help us feed data into our test plan and/or extract data from server responses. In addition, you learned what composes a JMeter test plan and got a good grasp on those components.

In the next chapter, we will dive deeper into form submission and explore more JMeter components.

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Key benefits

  • Use JMeter to create and run tests to improve the performance of your webpages and applications
  • Learn to build a test plan for your websites and analyze the results
  • Unleash the power of various features and changes introduced in Apache JMeter 3.0

Description

JMeter is a Java application designed to load and test performance for web application. JMeter extends to improve the functioning of various other static and dynamic resources. This book is a great starting point to learn about JMeter. It covers the new features introduced with JMeter 3 and enables you to dive deep into the new techniques needed for measuring your website performance. The book starts with the basics of performance testing and guides you through recording your first test scenario, before diving deeper into JMeter. You will also learn how to configure JMeter and browsers to help record test plans. Moving on, you will learn how to capture form submission in JMeter, dive into managing sessions with JMeter and see how to leverage some of the components provided by JMeter to handle web application HTTP sessions. You will also learn how JMeter can help monitor tests in real-time. Further, you will go in depth into distributed testing and see how to leverage the capabilities of JMeter to accomplish this. You will get acquainted with some tips and best practices with regard to performance testing. By the end of the book, you will have learned how to take full advantage of the real power behind Apache JMeter.

Who is this book for?

This book is for software professionals who want to understand and improve the performance of their applications with Apache JMeter.

What you will learn

  • See why performance testing is necessary and learn how to set up JMeter
  • Record and test with JMeter
  • Handle various form inputs in JMeter and parse results during testing
  • Manage user sessions in web applications in the context of a JMeter test
  • Monitor JMeter results in real time
  • Perform distributed testing with JMeter
  • Get acquainted with helpful tips and best practices for working with JMeter
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Table of Contents

8 Chapters
Performance Testing Fundamentals Chevron down icon Chevron up icon
Recording Your First Test Chevron down icon Chevron up icon
Submitting Forms Chevron down icon Chevron up icon
Managing Sessions Chevron down icon Chevron up icon
Monitoring Tests in Real-Time Chevron down icon Chevron up icon
Distributed Testing Chevron down icon Chevron up icon
Helpful Tips - Part 1 Chevron down icon Chevron up icon
Helpful Tips - Part 2 Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Full star icon Half star icon 4.3
(3 Ratings)
5 star 33.3%
4 star 66.7%
3 star 0%
2 star 0%
1 star 0%
Ramkrishna Bhandare Jan 23, 2019
Full star icon Full star icon Full star icon Full star icon Full star icon 5
value for money
Amazon Verified review Amazon
Traymane Sep 26, 2017
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
Really informative book for those whom are novice or want to further their skill set of JMeter.
Amazon Verified review Amazon
とあるエンジニア Feb 18, 2018
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
負荷テストを行う際にどういった指標を用いるべきか、またどんなことに気をつけるべきかなどから始まり、Jmeterの使い方が学べます。他にもどういったテストツールが存在しているかなども書いてあり、個人的に好感が持てます。あくまでも個人の感想ですが、負荷テスト経験がない方やJmeterを初めて扱う方には、よくまとまった良書だと思います。既にJmeterを大規模に運用されている方には物足りないかもしれません。
Amazon Verified review Amazon
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