HP XP P9000 for Compatible High Perf FICON Connectivity Software - Manual (Page 41)

hit ratio for that time period is 30 percent. A higher write hit ratio implies higher processing
speed because fewer data transfers are made between devices and the cache memory.
Storing period
Short-Range can be specified.
Selection of monitoring objects
Select monitoring objects in Performance Objects field. The combination of items is shown as
follows.
Item on right side of Monitor
Data field Item on left side of Monitor
Data field Item on right side of Object
field Item on left side of Object
field
Read (Total) Cache Hit (%) None Logical Device*
Read (Sequential)
Read (Random)
Read (CFW)
Write (Total)
Write (Sequential)
Write (Random)
Write (CFW)
Read (Total) Cache Hit (%) None Parity Group*
Read (Sequential)
Read (Random)
Read (CFW)
Write (Total)
Write (Sequential)
Write (Random)
Write (CFW)
Read (Total) Cache Hit (%) None LUN*
Read (Sequential)
Read (Random)
Read (CFW)
Write (Total)
Write (Sequential)
Write (Random)
Write (CFW)
* Volumes that do not accept I/O from the host, such as pool-VOLs, are not monitored.
Cache hit rates 41