gtps3m08System Performance and Measurement Reference


System Measurement and Performance Introduction

The system performance and measurement package has two components:

  1. The online data collection portion
  2. The offline data reduction portion (with segment names beginning with JR).

The online collection portion collects and records real-time TPF system performance information. The offline reduction portion reads, edits, and reports the recorded performance information. The data analysis is finally printed in reports. A clear understanding of these reports can lead to optimal system tuning and substantial performance increases.

This package monitors system performance by collecting predetermined indicators, at fixed time intervals, through interaction with the control program.

Performance information is collected on overall system and individual program activities. Specialized collectors retain information about the following:

Message traffic

Program activity

File storage activity.

A system collector records a cross section of total system activity.

The package is designed to report on the total processor environment. The ZMEAS command can start collection on an individual processor complex or across an entire loosely coupled processor complex. The collectors can gather all activity for all subsystems in a multiple database function (MDBF) environment. The reduction programs provide for generation of systemwide summaries and detail reports for a particular subsystem.