DFSORT performance data

Tuning activity is often started when a particular job is taking too long to complete or is using system resources excessively. But if such a “problem job” does not exist at your site, where do you start to look for ways to improve DFSORT's performance or balance its use of resources with other requirements?

The purpose of this chapter is to outline the actions available for those who want to tune the use of DFSORT at their site. It also shows what information you need about DFSORT, where to find it, and what methods are available for collecting the data, including use of the DFSORT installation exits ICEIEXIT and ICETEXIT. The specific topics include:

Where to find performance indicators
An overview of DFSORT performance information
Sources of DFSORT performance information
Techniques for analyzing DFSORT performance data
Balancing DFSORT requirements with system resources
Understanding trade-offs in improving performance