HP XP20000 User Manual page 50

Item Description
Current interval of collecting statistics.
Gathering Interval
Monitoring Data
Select the type of statistics to view in the window. To view I/O rates, select IOPS (I/Os
per second) from the list. To view transfer rates, select MB/s (megabytes per second)
from the list.
Select a monitoring term to narrow the range of statistics to display in the window.
Starting and ending times for collecting statistics are displayed on both sides of the slide
bar. Performance Monitor stores the monitoring data between these times, and you can
specify the desired term within this range as the target of display in lists and graphs.
For example, to view statistics within the range of 10:30 July 1 2007 to 10:30 July 2
2007, set the From box to 2007/07/01 10:30, set the To box to 2007/07/02
10:30, and then click Apply.
To set a date and time in the From and To boxes, do either of the following:
Monitoring Term
When you specify dates and time in the From and To boxes, Performance Monitor
calculates the length (in minutes) of the specified period and displays the calculated
length. When calculating the length in minutes, Performance Monitor rounds up the
fraction.
The From and To boxes are grayed out if the monitoring data (that is, obtained statistics)
is not stored in the storage system.
The Real Time option is unavailable when the Physical tab is active.
Select this option to view statistics in real-time mode, where statistics are updated at a
gathering interval you specify between 1 and 15 minutes.
When you select the Real Time option, use the list to select the number, between 5 and
Real Time 90, of recent collections of statistics to display in the graph. This setting determines the
range of recent statistics to be displayed in the graph. For example, if the gathering
interval is 1 minute and you select 90 from the list, the graph displays statistics obtained
in the last 90 minutes (multiplying 1 minute by 90 times).
50 Using the Performance Monitor Windows
If the number of CUs to be monitored is 64 or less, the value is between 1 and 15
appears as a gathering interval by minutes. For example, if 1 min. is displayed, the
information obtained every one minute is updated in the list and the graph.
If 65 or more CUs are monitored, the statistics are updated every 5, 10, or 15
minutes.
Select the storing period of statistics (monitoring data). The statistics displayed in the
WWN tab are stored only in short range, therefore, shortrange is displayed in this
list and you cannot change it. The range of monitoring data that can be displayed
in the window is between 8 hours and 15 days depending on the gathering interval.
For details on the types of storing period of statistics, see
Storage Ranges" on page 16. For details on the relationship between collection in-
terval and the storing period of the statistics, see
dow" on page 52.
Move the slider to the left or to the right.
In the text box, select the number that you want to change. Next, click the upward
or downward arrow button.
"Understanding Statistical
"Monitoring Options Win-