HP StorageWorks SAN Virtualization Services Platform administrator guide (5697-0204, January 2010)

The following table describes the available counters and what they measure.
ExplanationCounter name
Measures the average time it takes to complete a write
for a mirror job
Sync.Mirror Job Average Read Response Time (micro-
Sec)
Measures the average time it takes to complete a write
for a mirror job
Sync.Mirror Job Average Write Response Time (micro-
Sec)
When evaluating the access capabilities of a VSM to the setup volume, it is recommended to start
with the Sync.Mirror Average Write Response Time. If this value is higher than expected, then check
the performance of the individual jobs that construct this mirror group, and try to find out if there is a
particular job that is slower than others and degrades the overall performance. In order to fix such
an issue, you should break the slowest job and re-create it on a faster (or less loaded) array.
The following image is an example of using Windows Performance Monitor to show the synchronous
mirror writes to the setup volume. The graph combines the overall performance of the synchronous
mirror group and the write performance of the individual jobs.
Monitoring the SVSP domain68