HP StorageWorks XP Performance Advisor Software v4.6 User and Troubleshooting Guide (T1789-96094, June 2010)
IMPORTANT:
• The mix CHIP shows only eight ports and four MPs though there are eight MPs on that board. The
remaining four behave as ACP MPs.
• V-VOL — the virtual volumes of type snapshot or THP that might not be associated with any pool
at a given point in time.
• When configuration data is collected through the Inband mode on any XP array configured with
snapshot volumes associated with snapshot pools (other than the XP24000 and XP20000), all the
snapshot volumes and pools are collectively displayed as Snap-Grp. Performance data is collected
for all these volumes. For the VVols associated with a Snapshot pool or THP pool, the RAID group
column display the associated pool-id.
• If performance data is collected separately for DKC and ports, and RAID groups, through two
different schedules, all the metrics display the latest data as received by the management station,
from either of the schedules. To know more about schedules, see “Data Collection Configura-
tion” on page 37.
Viewing cache utilization
The Cache [Total - ### MB] group box under the Performance View tab displays the total cache
utilization (Cache in MB [Total — <value>]), and includes the following:
• Usage: The total cache utilized for the frontend and backend transactions.
• Writes Pending: The data buffered in the cache that is pending to be written into the backend
RAID groups and LDEVs.
• Sidefile information: The total cache used to store the data sequence number, record location,
record length, and queued control information for a remote data replication.
Click the Usage, Writes Pending, or Sidefile block to view a graphical representation of the Cache
performance. For more information on using chart options, see “Plotting charts” on page 213.
Related Topics
See the following related topics:
• “Advisory on CLPR utilization” on page 179
• “Cache usage chart” on page 178
Viewing CLPR utilization
The CLPR Details group box under the Performance View tab displays the following details for each
of the cache partitions (CLPRs) that belong to the Cache:
• Displays the CLPR number followed by the CLPR size in MB (CLPR # [Size - ### MB]).
• Usage: The CLPR cache utilized for the frontend and backend transactions.
• Writes Pending: The data buffered in the CLPR cache that is pending to be written into the backend
RAID groups and LDEVs.
• Sidefile information: The CLPR cache used to store the data sequence number, record location,
record length, and queued control information for a remote data replication.
You can also view an advisory on the usage of an individual CLPR. For more information, see “Advisory
on CLPR utilization” on page 179.
Viewing XP arrays resources178