HP XP P9000 Performance Advisor Software - Manual (Page 205)

Advisory on CLPR utilization
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 re-
sponse 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 asso-
ciated 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
HP StorageWorks P9000 Performance Advisor Software User Guide 205