Performance management means optimizing your hardware and
software resources for the current work load. This task entails
several distinct but related activities:
Acquiring a thorough familiarity with
your work load and an understanding of how that work load exercises
the system's resources. This knowledge, combined with an appreciation
of the operating system's resource management mechanisms, will enable
you to establish realistic standards for system performance in areas
such as the following ones:
Interactive and batch throughput
Interactive response time
Batch job turnaround time
Routinely monitoring system behavior to determine
if, when, and why a given resource is approaching capacity.
Investigating reports of degraded performance from
users.
Planning for changes in the system work load or
hardware configuration and being prepared to make any necessary
adjustments to system values.
Performing, after installation, certain optional
system management operations.