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In recent years, much has been written about the value of use cases and scenarios for capturing functional requirements; by comparison, their usefulness for performance management has received scant attention . An application scenario defined for performance management purposes: Involves a known fixed workload If Sir Isaac Newton were stating the laws of computer systems performance, his first law would surely have been: The graph of performance continues in a straight line unless the force of some external event causes it to change. Not knowing what changed is a serious impediment to problem diagnosis. How does performance suddenly become “abnormal”? Of [...] I would like to introduce Chris to the community. A specialist in performance management, Chris is joining us as a regular contributor to the Apdex Exchange. Through his work at IBM, Bachman, Database Associates, and Keynote Systems, Chris has helped to guide many organizations through the dangerous waters of software performance management. He compiled his [...] New Relic hosted a fast-paced webinar where Peter Sevcik, founder and executive director of the Apdex Alliance, provided an overview of Apdex. New Relic consultant Steve Hudson followed with real-world examples of how to measure Apdex scores in production Rails or Java web applications using RPM. Click here to see the August 26 [...] Apdex is a simple formula that converts many performance values into an easy to understand 0-to-1 performance index. Defining the target application response time T and accurately interpreting the result (the score) requires some methodology–and that methodology should reflect how you plan to use Apdex. There are three ways to use Apdex: to do tactical [...] |
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