What is Load testing in software testing? Examples,How To Do,Importance, Differences

For example, In the LoadRunner testing tool, the scenarios are created with the LoadRunner controller’s help. Load testing is testing where we check an application’s performance by applying some load, which is either less than or equal to the desired load. Some extremely popular sites have suffered serious downtimes when they get massive traffic volumes. E-commerce websites invest heavily in advertising campaigns, but not in Load Testing to ensure optimal system performance, when that marketing brings in traffic. Retrace proactively identifies various issues in QA and non-production stages of development.

What is meant by load testing

If the response times are slow, then this means developers should test to find the location of the bottleneck. Typical parameters include processing speed, data transfer rates, network bandwidth and throughput, workload efficiency and reliability. During https://globalcloudteam.com/ load testing, the system is taken through a steadily and constantly increasing load until it reaches the threshold. You want to find the weight limit—the weight of activity that an application, software, or website can handle under normal conditions.

Identify Discrepancies and Resolve Issues before Release

The test will also show the response time and throughput of the system along with other KPIs. When checking backend performance issues, the endurance of input over prolonged periods of time or simultaneous user input is important to understand. However, checking for things that could cause lag, broken functionality, or memory leaks before completing development is load testing in a limited form. As a subset of performance engineering, this type of testing addresses performance issues in the architecture and design of the system. Using performance testing tools, we can begin practicing risk management.

What is meant by load testing

By identifying the elements affecting a system’s response time, load testing helps to optimize response times for a system. As a result, customers use optimized software, which translates into greater user satisfaction. Furthermore, the application is likely to run into issues such as slow response times, inconsistent performance on changing platforms, poor usability, and failure to work under increasing user loads.

What Is Load Testing? Deep Dive Into the Types, Practices, Tools, Challenges & More

One such concept is the idea of using reusable components for load testing. These could be common scripts, pre-built models, or snippets of code that help your teams easily assemble load tests. If you’re a file sharing service, you’ll need to make sure that your systems can handle a large number of users downloading and uploading files concurrently. If you’re an ecommerce site, you’ll want to be prepared for large numbers of customers at certain times, such as on Black Friday.

What is meant by load testing

The objective of this test is to identify performance bottlenecks in the application before deployment. It is used to recognize the upper limit of a web application and check how the system can handle a heavy load. At first, organizations thought moving performance testing to the cloud would ease the performance testing process, while making it more scalable.

Challenges and Limitations of Load Testing

The framework in JMeter allows multi-threading, which means several separate thread groups may perform simultaneous and concurrent sampling. Here, we shall see the most outstanding tool out of these, i.e., the JMeter, and understand what makes JMeter a perfect fit for Performance Testing. Once the clients approve the use case, the script development begins. To perform the test, it enters a vast amount of data into the database.

  • Other types of load testing are capacity testing, stress testing, and soak testing.
  • Without some form of performance testing in place, system performance may be affected by slow response times and inconsistent experiences between users and the operating system .
  • Spike testing refers to the process where testers evaluate how a system responds to large spikes in user load.
  • Instead of creating testing scenarios based on user load, we will set various benchmarks and performance standards for each feature of the application.
  • For example, the piece of software under test is designed to serve X users , so it does not make sense to conduct testing under a higher load.
  • Benchmark testing measures performance against competing sites or internal requirements (such as end-user SLAs).

Load testing as a process doesn’t start till a project is close to its end. This is when system performance and actual user engagement can undergo accurate simulation and testing. As we add hits to the software, the system should be able to withstand traffic until we reach our expected weight limit.

Step5: Re-test

Depending on the system’s characteristics, the test may stop suddenly or have a short ramp-down period. It encompasses load testing as well as other forms of software testing load testing definition and ensures applications keep performing under different scenarios. Therefore, performance testing is not just limited to testing the effects of user load on a given system.

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This should be completed well enough ahead of the public release, allowing for last-minute system tweaks should the test fail. One major consideration we mentioned earlier is if you are measuring client-side activity, or more specifically, Web 2.0 technologies. It is very important when it comes time for simulating user actions, like navigating, button clicks, entering date within forms, etc. If this is the case, the tool you choose should replicate this as close as possible using real browsers, because that is what your users are using.


Developing detailed test plans before you actually create the tests is an important step in making sure the tests conform to the business analysis of the application and the defined criteria. A hardware configuration document is usually available from each test vendor that explains the hardware requirements for a particular load testing setup. The goal is to identify what part of the architecture design is limiting the performance and if the application recovers when the load is decreased. The focus of the test can be to see how a specific function is handling high-load or as a test that generates production-like transactions with a higher than expected throughput. Assertion in JMeter is used to validate response of the request, that you have sent to the server.

What is meant by load testing

An exception to this issue is a professional load testing platform, such as ZAPTEST load testing, which will focus on providing a clear, user-friendly interface. ZAPTEST LOAD offers the ability to create recorded and API based scripts performing end-user business processes and measuring end-to-end transactions throughout System Under Load . The software development process requires extensive ongoing testing, primarily agile testing, to help ensure efficient, predictable performance. However, agile testing has limitations regarding the end-user experience in a multi-user system.

Other types of Testing

Performance testing tools work by performing actions upon a website or app and recording the results. Many different metrics can be recorded by a testing tool, such as page load times, time to interact, and user responsiveness. When running a performance test, throughput refers to the amount of data transferred between the front end of the app and the back end over time. Specifically, throughput in testing could mean factors like network bandwidth, database I/O, simultaneous users, maximum memory constraints, and disk reads and writes. Each of these components could theoretically become a bottleneck for the throughput of data from the client to the server and vice versa.