Hitachi MK-96RD617-08 - Manual (Page 65)

Using the Performance Manager GUI 4-23
Hitachi Universal Storage Platform V/VM Hitachi Performance Manager User’s Guide
When you select the Real Time option, use the list to select the number of
recent collections of statistics which should be displayed in the graph. You
can select the number of times from 5 or 90. This setting determines the
range of recent statistics to be displayed in the graph. For example,
suppose the gathering interval is 1 minute. In this case, if you select 90
from the list, the graph displays statistics obtained in the last 90 minutes
(multiplying 1 minute by 90 times).
• In the Monitoring Data area, the list on the upper right of the list
specifies the type of statistics to be displayed in the window. If you want to
view I/O rates, select IOPS (I/Os per second) from the list. If you want to
view transfer rates, select MB/s (megabytes per second) from the list.
• The tree contains the Subsystem folder. Below the Subsystem folder are
SPM groups, which are groups of multiple WWNs. When you double-click an
SPM group ( ), the host bus adapters ( ) belonging to that SPM group
are displayed. The WWN and the SPM name of the host bus adapter are
displayed to the right of the icon. If you double-click Not Grouped in
the tree, host bus adapters (WWNs) that do not belong to any SPM group
are displayed.
If the WWN of a host bus adapter (HBA) is displayed in red in the tree, the
host bus adapter is connected to two or more ports, but the traffic between
the HBA and some of the ports are not monitored by Performance Monitor.
When many-to-many connections are established between HBAs and ports,
make sure that all the traffic between HBAs and ports is monitored (see
Monitoring All Traffic between HBAs and Ports for instructions).
• The list displays statistics (that is, I/O rates, transfer rates, or average
response time). For details on the list contents, see Monitoring Paths
between Host Bus Adapters and Ports.
• The SPM button starts the Server Priority Manager program product if
Server Priority Manager is enabled. For details on Server Priority Manager,
see Overview of Server Priority Manager and Server Priority Manager .
The SPM button is deactivated in real-time mode. To start Server Priority
Manager, activate the From and To boxes and release Performance
Monitor from real-time mode.
• If the Current Control label displays Port Control, the system is
controlled by the upper limits and the threshold specified in the Port tab of
the Server Priority Manager window.
– If the Current Control label displays WWN Control, the system is
controlled by the upper limits and the threshold specified in the WWN
tab of the Server Priority Manager window.
– If the Current Control label displays No Control, the system
performance is not controlled by Server Priority Manager.
• The Draw button displays a line graph illustrating changes in the I/O rate
or the transfer rate. The graph can display up to eight lines simultaneously.