HP XP Array Manager Software - Manual (Page 13)

1 Overview of HP StorageWorks
XP Performance Monitor
Performance Monitor lets you obtain usage statistics about physical hard disk drive, volumes, processors
or other resources in your storage system. Performance Monitor also lets you obtain statistics about
workloads on disk drives and traffic between hosts and the storage system. The Auto LUN window
displays a line graph that indicates changes in the usage rates, workloads, or traffic. You can view
information in the window and analyze trends in disk I/Os and detect peak I/O time. If system
performance is poor, you can use information in the window to detect bottlenecks in the system. For
an overview, see “ Overview of Performance Monitor ” on page 15.
Restriction : The Performance Control and WWN tab functions are not supported in this version.
Note : When using Performance Monitor, you must specify the volumes to be monitored in CUs. Therefore,
depending on your disk subsystem configuration, the list may display performance statistics for some
volumes and not display performance statistics for other volumes, if the range of used CUs does not match
the range of CUs monitored by Performance Monitor.
To correctly display performance statistics of a parity group and a LUSE volume, you must specify as
follows:
• Specify all volumes that belong to the parity group as the monitoring targets.
• Specify all volumes that make up the LUSE volume as the monitoring targets.
Figure 1 on page 14 illustrates and simplifies the performance management process.
XP24000 Performance Monitor User's Guide 13