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3. In the 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.
When you view usage statistics about paths, the items displayed in the list
by selecting longrange and shortrange are the same.
4. In the tree, double-click the Access Path Usage folder.
5. Do one of the following:
– To check usage statistics about paths between adapters (CHAs and
DKAs) and the cache switch, select Adapter-CSW, from below the
Access Path Usage folder.
– To check usage statistics about paths between adapters (CHAs and
DKAs) and the shared memory, select Adapter-SM, from below the
Access Path Usage folder.
– To check usage statistics about paths between cache switches and the
cache memory, select CSW-Cache, from below the Access Path
Usage folder.
The list on the right in Figure 5-12 displays the average and maximum
usage rate for the specified paths. The displayed statistics 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 Apply, 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 Performance
Management Window, Physical Tab).
6. If you want to display a graph illustrating changes in usage statistics about
paths, select the desired paths in the list and then click Draw.
Note: The range of monitoring and the gathering interval affects the time
period represented by a graduation on the horizontal axis.
Paths between adapters and cache switches:
Paths between adapters and shared memories:
Hitachi Universal Storage Platform V/VM Hitachi Performance Manager User's Guide
Performance Monitor Operations
5-25
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