Version 15.1 User’s Manual

Performance Management - Trend Stats Window
Before vs. After Tab - Splitting the Trend Line
Next, one must move the unique trend line to the before and after date ranges.
Notice the Before section...this section
shows the metrics for the first trend line
(Sep 27—Oct 19).
Next, the After section...this section shows
the metrics for the second trend line
(Oct 22 Nov 22).
The key is the Change section. It shows
impact of the change. In our example, we
see a change of –54%. This indicates that
the new hardware had a positive impact on
the system. That is, adding more disk arms
improved disk arm % from a 23% avg to an
average of 11%!
This functionality is a powerful tool to have
in your Systems Admin tool belt.
Version 15 User Manual Page 132 Oct 2011