HP XP Performance Advisor Software - Manual (Page 58)

collection is not limited to the number of LDEVs that the host station is mapped to use. If you
set the collection rate too narrow (less than 5 minutes), it results in reduced responsiveness
from the management station.
•
If you split the external RAID groups, RAID groups, ThP pools, and the snapshots into two
schedules, you cannot see the Total I/O, Total MB/s, and the Total Tracks fields in the LDEV
table.
•
If you split the journal LDEVs, external RAID groups, RAID groups, ThP pools, and the snapshots
into two schedules, and in charts, you select All from the LDEV drop-down box, the combined
data points from both the schedules are plotted on the chart. In addition, repeated time stamps
are displayed if the collection frequency for both the schedules is the same. As a result, incorrect
values are plotted on the graph.
For more information about charts, see “Plotting charts” (page 233) .
•
If you are collecting the performance data for the first time, it takes longer than usual for HP
XP P9000 Performance Advisor to collect the data. The subsequent performance data collection
is as per the time specified in the Frequency section.
•
If you have performed a one-time configuration data collection and later the XP or the P9000
disk array configuration is modified, HP recommends that you perform a fresh configuration
data collection, so that the performance data collected is for the latest configuration.
Initially, when performance data collection is not yet configured for the XP and the P9000 disk
arrays, the following details are displayed in the Performance Collection table, under the
Performance Collection tab:
Description Screen elements
Displays the DKC number of the XP or the P9000 disk
array. Array
Displays the system name of the host. Host ID
Displays the port that is configured to communicate data
between the command device on an XP or a P9000 disk
array and the associated host. Port
Displays the LDEV ID of the LDEV that is configured as a
command device. Cmddev
Displays the device file for the command device. DeviceFile
No schedule name. Schedule Name
Displays 0,0,0 Frequency (DKC, RG, Port)
Displays
Enabled
Displays the View link, clicking which displays empty
schedule, as the schedule is not yet created. Components
58 Collecting configuration and performance data