HP XP P9000 Performance Advisor Software v6.0 User Guide

groups are displayed under the RG (RAID Group) tab. This data is also displayed when you click
the Backend Total Avg group box under the Performance View tab.
If the number of busiest LDEVs or RAID groups are less than ten or if their utilization is zero, only
the busiest components are displayed. The 10 busiest LDEVs selected is based on the backend
transfer rate and the 10 busiest RAID groups selected is based on the Overall % RAID Group
Utilization.
IMPORTANT:
• Under the LDEV tab, you can also view the associated RAID Group for an LDEV. This data
helps determine if more than one LDEV is contributing to a RAID Group activity.
• If the LDEV is a LUSE Master, the details of individual LDEVs are considered for the busiest
components and not the sum of all the individual LDEVs.
The LDEV response time components, AVERAGE READ RESPONSE, MAXIMUM READ RESPONSE,
AVERAGE WRITE RESPONSE, and MAXIMUM WRITE RESPONSE, are measured in milliseconds.
Click an LDEV ID or RAID group name to view the performance graphs for all the associated metrics
in a chart window. To know more about charts, see “Plotting charts” (page 233).
Figure 21 10 busiest backend LDEVs
Figure 22 10 busiest backend RAID groups
Viewing 10 busiest LDEVs and RAID groups 207