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Interoperability with Other Products
Performance Monitor
Keep the following in mind while viewing Performance Management
windows.
•
User types
If the user type of your user ID is storage partition administrator, the
functions you can use are limited. For details, see Storage Partition
Administrators Limitations.
•
Maintenance
If the storage system is undergoing maintenance during monitoring, the
monitoring data might contain extremely large values.
•
Powering off the storage system
If the storage system is powered off during monitoring, monitoring stops
while the storage system is powered off. When the storage system is
powered up again, monitoring continues. However, Performance Monitor
cannot display information about the period while the storage system is
powered off. Therefore, the monitoring data immediately after powering on
again might contain extremely large values.
•
Viewing the Physical tab
– You will be able to view usage statistics that have been obtained for the
last three months (i.e., 93 days) in long-range monitoring, and for the
last 15 days in short-range monitoring. You will not be able to view
usage statistics that expired after these storing periods because such
statistics are erased from the storage system.
– In short range, if I/O workloads between hosts and the storage system
become heavy, the storage system gives higher priority to I/O
processing than monitoring processing, therefore, a part of monitoring
data might be missing. In case that monitoring data are missing
frequently, use the Gathering Interval option in the Monitoring Options
window to change the collection interval longer. For details, see Start
Monitoring and Monitoring Options Window.
– Short-range monitoring data and long-range monitoring data may have
some margin of error.
•
Viewing the LDEV, Port-LUN, and WWN tab
– Monitoring results are stored for the last 8 hours to 15 days depending
on the specified gathering interval. If the storing period has passed
since a monitoring result was obtained, the result is erased from the
storage system and you will not be able to view that monitoring result.
Hitachi Universal Storage Platform V/VM Hitachi Performance Manager User's Guide
About Performance Manager Options
2-17
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