Analyzing performance

This part of the book describes how IBM Tivoli Workload Scheduler for z/OS 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, throughput, and response times meet user’s expectations using resources available within the budget.

The performance of IBM Tivoli Workload Scheduler for z/OS should be considered when you:

• Plan to install a new system
• Want to review an existing system
• Contemplate major changes to a system.

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

• Agree what good performance is
• Set up performance objectives
• Decide on measurement criteria
• Measure the performance of the production system
• Make adjustments as required
• Continue to monitor the performance of the system and anticipate future constraints.

Recommendations given in this book, based on current knowledge of IBM Tivoli Workload Scheduler for z/OS, are general in nature, and cannot be guaranteed to improve performance of any particular system.