Administrator Guide

Working in the Performance topic
Topics:
• Viewing performance statistics
• Updating historical statistics
• Exporting historical performance statistics
• Resetting performance statistics
Viewing performance statistics
The Performance topic shows performance statistics for the following types of components: disks, disk groups, virtual pools, virtual tiers,
host ports, controllers, and volumes. For more information about performance statistics, see About performance statistics.
You can view current statistics in tabular format for all component types, and historical statistics in graphical format for disks, disk groups,
and virtual pools and tiers.
View performance statistics
1. In the Performance topic, select a component type from the Show list. The components table shows information about each
component of that type in the system.
2. Select one or more components in the list.
3. Click Show Data. The Current Data area shows the sample time, which is the date and time when the data sample was collected. It
also shows the total duration of all data samples, which is the time period between collection and display of the current sample, the
previous sample, if any, and a table of current performance statistics for each selected component.
4. To view graphs of historical data for the selected disks, disk groups, virtual pools, or virtual tiers, select the Historical Data check
box. The Historical Data area shows the time range of samples whose data is represented by the graphs, and the Total IOPS graph by
default.
5. To specify either a time range or a count of historical statistics samples to display, perform the following:
• Click Set time range. The Update Historical Statistics panel opens and shows the default count value of 100.
• To specify a count, in the Count field, enter a value in the range of 5–100 and click OK.
• To specify a time range, perform the following:
○ Select the Time Range check box.
○ Set date/time values for the starting and ending samples. The values must be between the current date/time and 6 months in
the past. The ending values must be more recent than the starting values.
NOTE: If you specify a time range, it is recommended to specify a range of 24 hours or less.
○ Click OK. In the Historical Data area, the Time Range values are updated to show the times of the oldest and newest samples
displayed, and the graph for the selected components is updated.
6. To view different historical statistics, select a graph from the Statistics list. For a description of each graph, see Historical performance
graphs on page 128.
7. To hide the legend in the upper right corner of a historical statistics graph, clear the Show Legend check box.
Historical performance graphs
The following table describes the graphs of historical statistics that are available for each component type. In the graphs, measurement
units are automatically scaled to best represent the sample data within the page space.
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128 Working in the Performance topic