System Values Report - IBM PERFORMANCE MANAGEMENT FOR POWER SYSTEMS - GRAPH REFERENCE DOCUMENT 10-2010 Reference

System Values Report

System Values Report
Note: The IBM i user interface function for adjusting system values is System i Navigator; or as
of Version 6.1, IBM Systems Director Navigator for i (a browser based user interface). In the
following discussion, these will be collectively referred to as the graphical user interface or GUI. In
prior releases, this interface was referred to as iSeries Navigator.
The System Values report shows the value set for key performance values. Also shown are the
actual average active jobs and maximum active jobs. For best performance, adjust these values
based on a regular review of the actual jobs.
The values shown are:

Active Jobs

Additional Number of Active Jobs

Total Jobs

Additional Number of Total Jobs

Performance Adjustment
The Performance Adjustment system value (QPFRADJ) is a member of the performance
category of IBM i system values. Use QPFRADJ to specify when to automatically adjust memory
pools and activity levels. Activity level refers to the maximum number of threads that can compete
for memory and processor resources (the maximum number of eligible threads at the same time).
Total Active Jobs (QACTJOB) and Total jobs (QTOTJOB) are members of the jobs category of
IBM i system values. Use these system values to set the amount of storage used at system
restart for active and total jobs.
The Active Jobs (QACTJOB) system value specifies the initial number of active jobs for which
auxiliary storage is allocated when you restart the system. An active job is one that has started
running and has not ended. The storage used is in addition to the storage allocated using the
total jobs system value.
Set QACTJOB to the estimated number of jobs that are active on a typical heavy-use day. To use
the GUI to see the number of active jobs on the system, select Work Management and then
select Active Jobs.
PM for Power Systems Graph Reference Document 97