•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.

394 Viewing Performance Data