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

164 Command Line User Interface
Optimize Invocations OPAQUE The number of times the optimize policy has been invoked.
Usage
The optimize policy runs only in background when idle
time is available in the array. It attempts to keep the array
operating optimally by keeping the write working set in
RAID 1+0 storage and by maintaining a minimum
threshold of free disk space. The optimize policy does not
necessarily do any optimization work when it is invoked
but this is still counted as an invocation. This metric will
have a non-zero value on an array that has idle time even
though the array may already be fully optimized. Actual
optimization activity occurring is measured by the
Relocations Spawned by Optimize metrics. A relative
comparison between invocations and relocations indicate
scenarios as described in the table below. In some cases
multiple scenarios are possible.
The optimize policy can operate in either a normal or a
priority mode. It will enter the priority mode when the
array is critically low on free space in an attempt to avoid
use of the make space policy.
Table 12 Performance Metrics (Continued)
Metric Categories Description/Usage