Familiarize yourself with the Performance Validation Tool – HP LoadRunner

Why do organizations need a tool like LoadRunner?

When an enterprise application is deployed to multiple users, no enterprise can think of running the risk of failure or inefficient performance, which on the one hand impacts enterprise-wide efficiency and on the other hand damages its reputation. LoadRunner is a well-known performance verification and validation tool designed to make accurate predictions of actual application performance and behavior, thereby increasing our confidence in the reliability of the new system before actually deploying it.

LoadRunner is a performance validation tool specifically designed to quickly provide answers to questions such as:

1) Whether my application can handle the expected user load and more?

2) Will my application be able to handle the number of transactions required by the business?

3) Whether my application is sufficiently stable under expected and unexpected user loads?

LoadRunner operating mode:

In a real scenario, it is not possible to create a situation where, for example, a thousand users use a system at the same time to test the system’s behavior under such stressful conditions. LoadRunner can create such a situation.

LoadRunner artificially simulates several thousand users (called virtual users). These artificial/digitally created users are forced to work on the same task at the same time, loading the system as real human users are expected to in practice.

With LoadRunner we can simulate situations with hundreds or thousands of artificial users and we can impose unique, consistent and repeatable loads on the system, stressing it from end to end. This allows us to emulate multiple business processes and production conditions that a deployed application will encounter.

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Main components of LoadRunner:

Load Runner has the following three main components to create and run the tests.

1) Virtual User Generator (VuGen): To capture the end user business processes in automated scripts.

2) Controller: To organize, drive, manage and monitor cargo.

3) Analysis: The analysis engine to display, analyze/interpret and compare the results.

Main benefits of LoadRunner:

1) Increasing the level of confidence in the performance of the new system.

2) Reduced risk of failure of the new multi-user system under high loads.

3) Provides an absolutely clear view of the end-to-end performance of the system before going live.

4) Verifies and confirms that the new application meets all specified performance requirements.

5) Verifies and reduces issues throughout the product development lifecycle.

6) Greatly simplified user interface level scripting process due to the use of Visual Scripting Language and ActiveScreen technology.

7) Easy analysis through the autocorrelation wizard, which automatically processes all monitoring and diagnostic data and calculates the top five causes of performance degradation.

8) Easy integration with the latest J2EE, Microsoft Visual Studio and Microsoft .NET environments.

9) Helpful in accurately predicting application scalability and capacity; thereby optimizing hardware investments.

10) Higher scalability with limited hardware due to low CPU and memory resource requirements per virtual user.

11) Helpful in pinpointing user-level, code-level, and system-level problems easily and quickly.

12) Helpful in minimizing debugging costs by thoroughly testing the application well in advance of the development lifecycle.

13) Helpful in creating efficient service level management long before services go live.

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14) Helpful in getting developers involved in performance testing from the start due to easy use of LoadRunner scripts directly in the IDE.

15) Helpful in real-time performance monitoring of all system components.

16) New feature Script generator wizard for service-oriented architectures (SOA) helps to select test aspects of SOA environments and create scripts accordingly. Helpful in boundary testing, interoperability and security related testing.

17) New function of supporting XML (Extensible Markup Language) parameters with the possibility of replacing the complete XML structure with a single parameter.

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