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Figure 25 An Example of Disk Processor Usage Rates Displayed

The list displays the following items:

• : When the green checkmark icon is displayed on the left of a disk processor, the graph

illustrates changes in usage rate for the disk processor.

• ID: This column displays ID numbers for disk processors.

• Usage:

•The Ave. (Total) column displays the average usage rate in the speciﬁed period.

•The Max. column displays the maximum usage rate in the speciﬁed period.

Viewing Usage Statistics about Data Recovery and Reconstruction Processors

(DRRs)

Performance Monitor monitors tracks data recovery and reconstruction processors (DRRs) and lets you

view the average and the maximum usage rate in a speciﬁed period. Performance Monitor also displays

agraph th

at illustrates changes in DRR usage within that period.

To view usage statistics about DRRs:

1. Ensure that the Auto LUN window is displayed.

2. In the tr

ee, click the Physical tab.

3. In the drop-down list above the tree, select the storing period of statistics from longrange and

shortrange for display.

For details on the types of storing period of statistics, see

“Understanding Statistical Storage Ranges”onpage15.

When you

view usage statistics about DRRs, the items displayed in the list by selecting longrange

and shortrange are the same.

4. In the tree, double-click the DKA folder.

5. Click DRR from below the DKA folder.

The lis

t on the right displays usage statistics about DRRs (Figure 26 on page 58). The displayed

statis

tics are the average and the maximum usage rates for the period speciﬁed in the From

and To boxes.

Note:

If you change the date and time in the From and To boxes and then click the Apply button,

Performance Monitor recalculates usage rates and updates information in the list. To change

the date and time in From and To boxes, use the arrow buttons and the sliders (for details, see

“Auto

LUN Window, Physical Tab” on page 29).

6. To di

splay a graph that illustrates changes in usage rate for DRRs, select the desired DRRs in the

list and then click the Draw button.

Note:

The range of monitoring and the gathering interval affects the time period represented by

agra

duation on the horizontal axis.

XP24000 Performance Monitor User's Guide

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