A data warehouse team is reporting poor performance on their batch reports. The database
runs on a Solaris host connected to a DMX-4 array with Fibre Channel drives sized to
support a sequential read workload. Which ratio in Performance Manager metrics would be
most useful in diagnosing the performance issue?

A.
Read % vs. Write %

B.
Prefetched tracks per second vs. Tracks not used per second

C.
KBytes read per second vs. I/O per second

D.
I/O per second vs. Average sampled read time