Setting performance objectives

This book describes how CICS® performance might be improved. It also provides reference information to help you achieve such improvement.

Good performance is the achievement of agreed service levels. This means that system availability and response times meet user’s expectations using resources available within the budget.

The performance of a CICS system should be considered:

There are several basic steps in tuning a system, some of which may be just iterative until performance is acceptable. These are:

  1. Agree what good performance is.
  2. Set up performance objectives (described in Establishing performance objectives).
  3. Decide on measurement criteria (described in Performance monitoring and review).
  4. Measure the performance of the production system.
  5. Adjust the system as necessary.
  6. Continue to monitor the performance of the system and anticipate future constraints (see Monitoring for the future).

Parts 1 and 2 of this book describe how to monitor and assess performance.

Parts 3 and 4 suggest ways to improve performance.

This part contains the following sections:

Recommendations given in this book, based on current knowledge of CICS, are general in nature, and cannot be guaranteed to improve the performance of any particular system.

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