Mercury LoadRunner Testing Tool
Printed From: One Stop Testing
Category: Testing Tools @ OneStopTesting
Forum Name: LoadRunner @ OneStopTesting
Forum Discription: LoadRunner is a performance and load testing product by HP / Mercury Interactive for examining system behavior and performance, while generating actual load.
URL: http://forum.onestoptesting.com/forum_posts.asp?TID=2725
Printed Date: 14Jul2025 at 10:57am
Topic: Mercury LoadRunner Testing Tool
Posted By: tanushree
Subject: Mercury LoadRunner Testing Tool
Date Posted: 08Oct2007 at 1:01am
Mercury LoadRunner Testing Tool
Mercury LoadRunner is a load testing product that determines
application scalability, behavior, and performance. It emulates
thousands of virtual users and identifies and isolates performance
bottlenecks across and within each tier.
LoadRunner components
LoadRunner contains the following components
Virtual User Generator (VuGen):
Records Vuser scripts that emulate the steps of real users using the
application. In testing environment the LoadRunner replaces human users
with virtual users (Vusers). Vusers create load by emulating actions of
typical users. VuGen works on record and playback principle. You have
to walk through a business process or test process on your application
which is recorded by VuGen into scripts. Then you can run these scripts
n times simulating the test case of n users performs that particular
business process simultaneously.
Controller:
The administrative center for creating, executing and monitoring
Scenarios. It provides you the tools to create the scenarios. Or in
other words you can set attributes of your scenarios here (like think
time). For example you may want 10 users log into a system
simultaneously, you can use rendezvous event.
Analysis: Uses the
Load Test results to create graphs and reports. This is to identify
bottlenecks and performance issues or any other failures in your
system’s performance and then pinpoint the source of these failures.
Understanding Load Runner Terminology
Scenarios - A scenario identifies the scripts to execute, the number of
Vusers, goals of the test and the conditions under which to run the
tests.
Vusers - Vusers emulate the actions of
human users working with your application. A scenario can contain tens,
hundreds, or even thousands of Vusers.
Vuser Scripts - The actions that a Vuser performs during the scenario are described in a Vuser script.
Transactions - To measure the performance of the server, you define
transactions. A transaction represents end-user business processes that
you are interested in measuring.
Load Generators – They
are dedicated machines which are used to run the Vusers that generate
load on the application under test.
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