HP XP P9000 Performance Advisor Software v6.0 User Guide

Advisory on CLPR utilization
HP XP P9000 Performance Advisor provides an advisory on the usage of individual CLPRs in an
XP or a P9000 disk array. The advisory is based on the data collected for the past one week. The
following are the scenarios for which an advisory is created:
• If the cache for a CLPR is less utilized, the advisory suggests that you consider re-allocating
portion of the cache to the other CLPRs.
• If the write pending data is more than the random read cache hits, the random read or write
response time may be high due to the writes pending with cache. The advisory suggests that
you consider increasing the cache size for the current CLPR or reassign some of the RAID
groups associated with the current CLPR.
• If the write pending data is more than the sequential read cache hits, the sequential pre-fetching
of data may not work. The advisory suggests that you consider increasing the cache size for
the current CLPR.
To view advisory for an individual CLPR:
1. Select an XP or a P9000 disk array under Arrays in the left pane.
2. Under the Performance View tab, click the advisory icon ( ) in the CLPR Details group box.
The advisory icon is displayed when any of the above stated conditions are met.
The CLPR advisory appears and provides a brief analysis of the CLPR utilization and also
suggestions on optimizing the CLPR usage.
For example, if there are CLPR 1 and CLPR 2 in your P9000 disk array and CLPR 1 is less
utilized over the past seven days, you will see the following advisory:
Viewing CHIP/CHA data
Based on whether you selected an XP or a P9000 disk array, click a CHIP/CHA in the CHIP Port
Activity Ave group box under the Performance View tab to view the summary of all the installed
CHIPs/CHAs. You can also click CHIP for an XP disk array or CHA/DKA for a P9000 disk array
in the component selection tree.
182 Viewing XP and P9000 disk array components