HP Storage Essentials SRM 6.0 User Guide for Enterprise Edition and Standard Edition SRM Software (July 2008)

Viewing Performance Data394
• The minimum collection interval that can be set for the EVA performance data collectors is 1
minute. The collection interval for real-time metrics is 20 seconds and cannot be changed.
Frequent collection of large amounts of performance data, combined with regular I/O, may
impact Command View EVA responsiveness. However, this does not impact the EVA’s data I/O.
The repeat collection interval is two hours and is not configurable.
• Only Vdisks that mapped to a host have performance metrics associated with them. Only
grouped physical disks have performance metrics associated with them.
• The default idle time-out is 2 hours and is not configurable.
General Considerations for Performance Manager
Keep in mind the following about Performance Manager:
• If you see the message “There is not enough data to produce a chart [chart_title] at this time,”
lessen the frequency option or select All in the Edit Chart Property dialog box.
• Verify the performance collector for that element is enabled. See ”Managing Performance
Collection” on page 217 for more information about enabling performance collectors.
• Direct attached storage ports are not displayed in the storage tree in the bottom left pane.
• Performance Manager is not available to file servers.
• To learn more about the buttons in the toolbar, see ”The Toolbars in Performance Manager” on
page 395.
• The aggregated volume and aggregated drive filters are no longer shown for LSI 5884 storage
systems or any of such a system’s controllers. These filters were available in builds earlier than
4.0 of the management server.
• If one or more scheduled data points on a graph seem to be missing, it may be that an error
occurred collecting data at that time. Check the CIMOM log for errors for the time frame
covering sample interval of the missing data point(s).
IMPORTANT: All collectors are stopped during Discovery Data Collection. This means that during
Discovery Data Collection, data for Performance Manager is not updated. Historical collectors, such
as those available from the Configuration tab, are restarted when they are stopped during
Discovery Data Collection. Charts that were active in Performance Manager when Discovery Data
Collection was started are not restarted.
Accessing Performance Manager
To access Performance Manager, click Performance Manager Optimize > Storage Essentials >
Performance Manager, or click Tools > Storage Essentials > Home, and then click Performance
Manager in the left pane.
Creating Performance Charts
To create a performance chart for an element:
1. Access Performance Manager as described in ”Accessing Performance Manager” on
page 394.