Performance Engineering Of Web Applications

Test logs are to be recorded & maintained for performance engineering.The emphasis is to be on identifying application bottlenecks under various load conditions.It is recommended to re-run the test to validate the effect of any fixes made.Analyzing the data:The test results are to be reviewed and analyzed by a performance analyzer with experience in Hardware platforms Operating systems, Databases and Software design. Such a team can identify bottlenecks, analyze the root cause and provide recommendations for corrective action.Providing results & recommendations: A report including observations and recommendations along with the metrics

Collected during the test by performance analyzer is to be submitted on the completion
of each test run through performance consulting.Best Practices:The objective of a performance testing engagement is to ensure stability and scalability of the web application.Understanding and following best practices in this area will help isolate and fix bottlenecks rapidly and would also help in making the performance benchmarking process more effective.1.Test for common performance bottlenecks-Web Server,Database Server and Network problems are the most common reasons why web applications fail to scale.It is best to start performance

Engineering from the easiest to the most difficult application layer.2.Test for common transactions-It is critical to test these transactions first as they are the ones that will put the most load on the system.3.Create reusable test scripts-Maintaining a library of reusable test scripts can minimize rework and significantly improve testing cycle time.4.Track defects to closure-A performance testing engagement cannot be conducted on the basis of a pre-determined number of test runs.Repeating tests is important to ensure that the recommendations once implemented have resulted in fixing the issues.

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