Performance Modelling — What, Why, When and How

  • Authors:
  • Paul Singleton

  • Affiliations:
  • BTexact Technologies

  • Venue:
  • BT Technology Journal
  • Year:
  • 2002

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Abstract

Management of performance risk is achieved by using performance engineering techniques. A major weapon in the performance engineering armoury is performance modelling. Modelling means prediction — estimating the performance of a new system, estimating the impact of change on an existing system or estimating the impact of a change of workload on an existing system. This paper describes how IT systems performance modelling fits into the overall performance engineering approach and its role in performance prediction and risk management. It then focuses on a recent case study illustrating why a particular modelling technique was used, how it was used, and the outcome of the modelling exercise.