Vuser scripts are created by Virtual User Generator with the recording of activities between client and server. It records the scripts. These ascripts are used to emulate the steps of real human users. Using Vugen, we can also run the scripts for debugging.

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Before going for describing the benefits of LoadRunner, I would like to tell you few basic questions that a performance test should answer:

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There is requirement for Performance Testers with 5 – 7 years experience with IBM.
IBM will conduct the Interviews on 05-Dec-09, Saturday.
Job Type : Permanent Job In IBM
Skills : LoadRunner, Mercury Performance Center, Rational Tools etc.
Experience : 5 – 7 yrs in Testing, 3 years relevant in Performance mandatory.
Date of Interview : 5-Dec-09
Interview Location : Gurgaon
Work [...]

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Do’s:

After each performance test run, clear the logs for database and application. Large log files may result in inaccurate performance results.
To mirror the production environment, identify the correct software and hardware for server.

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Two tasks for Parametrization in LoadRunner:

Replacing the constant values with parameters (in Vuser script)
Setting the properties and data source for the parameters

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Once the recording of Vuser is done, then, next step is to enhance the capabilities of the script by adding some functions. Here, in this post, I’m going to describe some basic and most commonly used function categories in brief:

General Vuser Functions: The Vuser functions which have LR as prefix are general functions. These functions [...]

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Scenarios: Scenarios define the events that occur during each testing session. In LoadRunner, we can divide the performance testing requirements into multiple scenarios. Basically, a scenario defines and controls:

Number of Vusers to emulate
Actions that they perform
Machines on which they run

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Here is the descriptions of main environments and platforms supported by HP LoadRunner:

Application Deployment Solution: Citrix protocol
Client – Server: MS SQL, ODBC, Oracle Web Applications 11i, DB2 CLI, Sybase Ctlib, Sybase Dblib, Windows Sockets, and DNS protocols
Custom: C templates, Visual Basic templates, Java templates, Javascript and VBScript type scripts.

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Why there is a need of Performance or Load testing of an application:

Does the application response time is adequate as expected by the intended users?
How the application will handle the expected and unexpected user loads?
How the application will handle the expected and unexpected transactions required by the business?
To check the stability of application under heavy [...]

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HP Mercury’s LoadRunner is a performance testing and load testing tool by for evaluating the system performance while generating simulated load. By using LoadRunner, we can emulate hundreds and thousands of concurrent users to the application or software product; so that it can be tested under a heavy real life user loads.

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