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Comparison of different load testing tools, and an overview of the Visual Studio Web and Load testing features
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www.orbitone.com
Raas van Gaverestraat 83B-9000 GENT, BELGIUM E-mail [email protected] Website www.orbitone.com
Tel. +32 9 330 15 00VAT BE 456.457.353Bank 442-7059001-50 (KBC)
Wim Roegiers16 February, 2010
Load Testing of ASP.NET Web Applications
16 February, 2010Load Testing of ASP.NET Web Applications
Load testing: Definition
Load testing is the process of putting demand on a system or device and measuring its response.
When the load placed on the system is raised beyond normal usage patterns, in order to test the system's response at unusually high or peak loads, it is known as stress testing. The load is usually so great that error conditions are the expected result.
16 February, 2010Load Testing of ASP.NET Web Applications
Why load tests?
The failure of a web application can be costlyAssure performance and functionality under real world
conditionsLocate and resolve potential problems before it hits on the usersWe will get to know the maximum capacity the system can
handleWe can decide whether we should go for Hardware upgrades or
Performance tuning
16 February, 2010Load Testing of ASP.NET Web Applications
The goals of load testing
To Improve :
Performance To reduce the time necessary to execute a request. May involve the optimization of methods, stored procedures, and transaction lengths.
Scalability To exceed the number of concurrent users anticipated at peak load in production. The number of concurrent users supported should be proportional to the amount of hardware.
Stability To reduce component memory leaks and system crashes.
16 February, 2010Load Testing of ASP.NET Web Applications
Tools
Requirement: Very easy to set up and to use ( => no extra cost ) Several tools examined: Only Visual Studio Load Testing and the
site loadimpact.com have enough featuresQuickly diagnose and resolve:
Load testing tools uncover application performance issues under load and provide classic system monitoring to diagnose performance bottlenecks in the underlying infrastructure. However, they generally treat applications as a black-box. Consequently, load testing tools do not deliver the information developers need to quickly diagnose and resolve the performance issue in the application’s code.
16 February, 2010Load Testing of ASP.NET Web Applications
Loadimpact.com
With this online tool you can (only) measure the load time of a page with different user loads
Example testshttp://loadimpact.com/result/construction.orbitone.com/VlaamseOp
era2007/default.orb-4b482f3b9b935caedb3484e46b8de714
http://loadimpact.com/result/www.denorbit.com-6f2d1986218e19900ef3295db398d419
16 February, 2010Load Testing of ASP.NET Web Applications
Visual Studio: Load Testing
Extensive capabilities, easy to use, no additional tool requiredDemo (Umbraco website)
16 February, 2010Load Testing of ASP.NET Web Applications
About Scenarios
Load tests contain scenarios, which contain Web tests or unit tests.
A scenario is the container within a load test where you specify load pattern, test mix, browser mix, and network mix.
Scenarios are important because they provide you with flexibility in configuring test characteristics that allow for simulation of complex, realistic work loads.
16 February, 2010Load Testing of ASP.NET Web Applications
About Load Patterns
The load pattern properties specify how the simulated user load is adjusted during a load test. Team Edition for Testers provides three built-in load patterns: constant, step, and goal-based.
Constant: a user load that does not change during the load testStep: a user load that increases with time up to a defined maximum user load
Goal-Based: adjusts the user load based on performance counter thresholds
16 February, 2010Load Testing of ASP.NET Web Applications
About Think Times
Think times are used to simulate human behavior that causes people to wait between interactions
