HP XP Array Manager Software - Manual (Page 61)

NOTE:
When statistics are collected, a heavy workload is likely to be placed on servers. Therefore, the client
processing might slow down.
To stop monitoring the storage system:
1. Start Performance Monitor and select the Monitoring Options tab.
The Monitoring Options window is displayed.
2. In Monitoring Switch, select Disable for the Current Status option.
The Gathering Interval list is unavailable.
3. Click Apply.
Performance Monitor stops monitoring the storage system.
Monitoring Resources in the Storage System
This section describes how to view usage statistics about resources in the storage system.
Before taking the following steps, you need to start monitoring in accordance with the procedure
described in “
Monitoring Options Window ” on page 52 and obtain the usage statistics.
Viewing Usage Statistics about Parity Groups
Performance Monitor monitors parity groups and displays statistics about the average and the maximum
usage rate in a specified period. Performance Monitor also displays a graph that illustrates changes
in parity group usage within that period.
To view usage statistics about parity groups:
1. Ensure that the Auto LUN window is displayed.
2. In the tree, click the Physical tab.
3. In the list above the tree, select the storing period of statistics from longrange and shortrange for
display.
For information on storing period of statistics, see “
Understanding Statistical Storage
Ranges ” on page 16.
When you view usage statistics about parity groups, the items displayed in the list by selecting
longrange and shortrange are the same.
4. In the tree, select the Parity Group folder.
The list on the right displays usage statistics about parity groups. The displayed statistics are the
average and the maximum usage rates for the period specified in the From and To boxes.
The list displays up to a maximum of 4,096 resources at a time. If the number of resources exceeds
4,096, use Previous and Next to display the remaining resources.
• If you change the date and time in the From and To boxes and then click Apply button, Per-
formance 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 31).
• If an exclamation mark (!) is displayed before a usage rate, the reported parity group usage
rate is likely to be inaccurate, because the configuration has changed (for example, volumes
XP24000/XP20000 Performance Monitor User Guide 61