
530 6.3 Monitoring Exchange 2003 Performance
tile. This means that during 1 percent of the time, the I/O rate to the log
area was comprised of between 94 and 229. If you were to pick the maxi-
mum value for further sizing consideration, you realize that you could sig-
nificantly oversize your configuration for 99 percent of the time. For the
database I/O rate, the difference between 99th percentile and the maxi-
mum is three times as much!
This back-of-the-napkin analysis (which only took a handful of minutes
to make after displaying the data set) so far shows that maximum values are
much larger than percentile values—it is indeed well worth dismissing ...