HP StorageWorks Command View SDM Installation and User Guide (T1086-96023, February 2005)

Command Line User Interface 183
Command Line User Interface
Write Cache Size (absolute) ARRAY The capacity of memory allocated to the write cache (in
Kbytes). The write cache memory is non-volatile and
mirrored between the dual controllers.
Usage
The capacity of the write cache is based on the amount of
memory installed in the controllers. If other metrics
indicate the write cache is not effectively servicing the host
write workload, it may be possible to increase
performance by installing more controller memory.
Write commands DISK The number of read commands issued to the disk.
Usage
This metric for all the disks can be compared to determine
if there is an imbalance in the workload that is causing a
single disk or a small set of disks to be a performance
limitation. The array attempts to spread the workload
evenly across all the disks but certain workload patterns
could possibly defeat this process.
Table 12 Performance Metrics (Continued)
Metric Categories Description/Usage