Version 15.1 User’s Manual

Understanding The Impact Of Changes
Whether one makes a simple work management tuning change or is coordinating a major hardware
upgrade, its vital to understand the impact of the changes to the AS/400. We easily accomplish
this via MPG’s Power Analytics. On the following pages we will introduce the techniques
to do effectively understand the impact of changes to your system. We do this with
MPG’s state of the art Before vs. After analysis
There are two types of Before vs. After analysis:
Before vs. After is an overall system analysis
Measures all core performance components for a designated before / after period, showing:
(1) Average and peak statistics for CPU, Disk, & Memory components
(2) Percentage of change difference between the before and after period
(3) Before vs. after metrics are measured against best practice performance guidelines
Before vs. After Job Analysis
Measures all core performance components for a designated Job. Again, we can measure for a
any specified before / after period. In this analysis, we show:
(1) Average and peak statistics for CPU, Disk, & Memory components
(2) Percentage of Change difference between the before and after period
On the next page, we look at how we set up the Before vs. After comparison parameters
Version 15 User Manual Page 190 Oct 2011