HP XP7 Storage - Manual (Page 13)

the interval is changed. For instance, if the sampling interval is set or changed to 15 minutes,
monitoring data is not accumulated for up to 29 minutes after this setting is made.
•
Display of monitoring data during high SVP workload
If the SVP is overloaded, the system might require more time than the sampling interval allows
to update the display of monitoring data. If this occurs, some portion of monitoring data is
not displayed. For example, suppose that the sampling interval is 1 minute, and the display
in the Performance Management window is updated at 9:00 and the next update occurs at
9:02. In this case, the window (including the graph) does not display the monitoring result
for the period of 9:00 to 9:01. This situation can occur when the following maintenance
operations are performed:
◦ Adding, replacing, or removing cache memory.
◦ Adding, replacing, or removing data drives.
◦ Changing the storage system configuration.
◦ Replacing the microprogram.
•
Pool-VOLs
Pool-VOLs of Fast Snap, Thin Provisioning, and Thin Provisioning Z are not monitored.
•
Margin of error
The short-range and long-range monitoring data may have a margin of error.
Performance monitoring workflow
1. Determine the resources to be monitored and the data to be collected, and write down the
required information, including control unit (CU) numbers and WWNs of host adapters.
2. Set the storing period (short-range or long-range) for the monitoring statistics. For instructions,
see
“Setting the storing period for the monitoring data” (page 13) .
3. Start performance monitoring. For instructions, see “Starting monitoring” (page 14) .
4. Add the WWNs to monitor. For instructions, see “Monitoring WWNs” (page 14) .
5. Add the CUs to monitor. For instructions, see “Monitoring CUs” (page 18) .
6. Adjust the sampling interval as needed to increase or decrease the maximum storing period
of short range statistics. For instructions, see
“Changing the sampling interval” (page 20) .
7. View the monitoring data on graphs. For details, see “Using the Performance Monitor data
graphs” (page 21) .
8. Export the monitoring data as needed for analysis and for retention of long-term data. For
details, see
“Exporting Performance Monitor data” (page 90) .
9. When you want to stop collecting monitor data, stop monitoring by disabling the monitoring
switch. For details, see
“Stopping monitoring” (page 20) .
Setting the storing period for the monitoring data
Before you start the monitoring function, you need to set the storing period, short-range or
long-range, for the monitoring data. Short-range data can be collected for up to fifteen days, and
long-range data can be collected for up to six months.
Prerequisites
•
Required role: Storage Administrator (Performance Management)
1. Display the Remote Web Console main window.
2. Select Analytics in Explorer, and select Performance Monitor in the tree to open the Performance
Monitor window.
Performance monitoring workflow 13