Endurance Testing For Beginners

Endurance Testing is a type of performance testing where software is tested with a load extended over a remarkable amount of time to evaluate software application behavior under sustained use. The main aim of endurance testing is to ensure that the application can handle an extended load without any response time deterioration.

It is performed at the last stage of the performance run cycle. It is a long process and sometimes lasts for even a year. This may include applying external loads like Internet traffic or user actions. This makes it differ from Load Testing, which usually ends in a couple of hours or so.

The goals of Endurance Testing

  • It is usually done by either overloading the system or reducing various system resources and evaluating the consequences.
  • It is performed to ensure that defects do not occur after what is considered a relatively “normal” usage period.
  • To make sure that after a long period, the system response time will remain the same or better than the test’s start.
  • A system will support and meet performance goals to determine the number of users or transactions.
  • To discover how the system performs under usage.
  • To manage future loads, you need to understand how many additional resources are necessary to support users in the future.
  • The primary goal is to check for memory leaks.

Process of Endurance Testing

  • Testing Environment – Identify the Software, hardware, the OS required for the endurance testing, assign responsibilities, roles within the team, etc. The environment must be ready before the test execution. You also need to estimate database production size and yearly growth. You need to test how the application will respond after some time.
  • Creating the Test Plan and Scenarios – Based on the testing manual or automation, Test Case design, reviews, and execution should be planned. Testing to stress the system, breakpoint testing, etc. should also be part of the test plan. Testing the system determines the breaking point in the application.
  • Test Estimation – It provides the estimation of how long it will take to complete the testing phase. It should be analyzed based on the no of testers involved and the no of test cycles required.
  • Risk Analysis – Analyzing risk and taking action for prevention. Prioritize the test cases and identify the risk 
    • Will performance remain consistent over time?
    • Are there other minor issues that have not yet been detected?
    • Is there external interference that was not addressed?
  • Test Schedule – Determine the budget within the time frames. Endurance Testing applies a huge but natural load arrangement of transactions to the system/application for a continuous period.

Endurance Testing Example

Endurance testing takes the application to its maximum overtime, while Stress testing takes the tested device to its limits. 

For example, as the software runs for a long period of time, the most complex problems – memory leakage, database server misuse, and unresponsive machine – exist. Your odds of finding those faults prior to deployment are very slim if you miss the endurance checks. 


  • It identifies typical issues in smaller targeted performance tests, which means it ensures application remains available even when there is a huge load in a very short period.
  • The endurance test is used to check whether there is any performance degradation after a long execution period.
  • It offers accurate data that customers can use to enhance their infrastructure needs.
  • It identifies performance problems that may occur after a system has been running at a high level for a longer period
  • It helps in determining how the workload can change the System Under Load handle.


  • Some application components fail to respond.
  • The end-user observes unhandled exceptions.
  • Endurance Testing can cause application or network failures that may disrupt if Test Environment is not isolated.
  • Resource utilization remains high after the stress is removed.
  • It is hard to define how much stress is worth applying.
  • Data loss or corruption may occur by over-stressing the system.

What to monitor in Endurance testing

  • Test memory leakage– The checks are done to verify any memory leakage in the application that can cause the system’s crashing or O.S.
  • Test connection closure between the system’s layer – If the connection between the system’s layers is not closed, it may stall modules of the system.
  • Test database connection close – If the database connection is not closed, it may result in a system crash.
  • Test response time – The system is tested for the system’s response time as the application becomes less efficient 

Best Endurance Testing Tools

Apache JMeter

JMeter is an automation testing tool which performs load test, functional test, regression test, on different technologies. It supports various types of applications, protocols, and servers like  SOAP, TCP, FTP. SOAP, LDAP MOM, shell scripts, Mail Protocols, Java objects, database.



  • It is open-source software.
  • Interactive and straightforward GUI.
  • It is highly protractile.
  • The test plans are stored in XML format.
  • It is platform-independent.
  • Best API automation tool.


It is free to use.


Loadrunner is a  solution for Performance Testing by Hewlett-Packard (HP). It is one of the best-automated tools for Performance Testing and has occupied almost 50 percent of the market share. Loadrunner simulates hundreds of virtual users into your application, monitor different performance metrics, and isolate another client and server bottlenecks.

endurance testing


  • Cloud Testing.
  • Root Cause Analytics.
  • Supports a Wide Range of Apps.
  • Continuous Testing.
  • Mobile Testing.
  • Interactive User Transaction Simulation.


  • VIRTUAL USER DAYS-$0.56/virtual user day
  • ENTERPRISE EDITION-Contact vendor

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