HP XP P9000 Performance Advisor Software v5.5 User Guide (T1789-96337, Februrary 2013)

Table 40 Metrics and descriptions (continued)
DescriptionMetricMetric category
The total random and
sequential frontend read
Total MB Reads  Frontend
MBs on this LDEV during the
entire collection interval.
The total random and
sequential frontend Write
Total MB Writes  Frontend
MBs on this LDEV during the
entire collection interval.
This metric represents the
Read IO share (%) out of
Read/Write IO Ratio [%] 
Frontend
total IO for the selected host
group.
This metric represents Read
MB share (%) out of total MB
for the selected host group.
Read/Write MB Ratio [%] 
Frontend
Single port.The maximum frontend I/Os
rate on this port over an
Maximum Port IO 
Frontend
entire collection interval. It is
the maximum of the last
collection interval. For
example, if collection
interval is set to five minutes,
the maximum port IO value
is collected and verified
against the previous value
every one minute, and the
highest port I/O value
collected in the last five
minutes is considered.
The average frontend I/Os
rate on this port over an
Average Port IO  Frontend
entire collection interval. Port
Average IO shown in PA is
average of average IO.
Average Port IO is the value
within a period of sampling
time at one minute interval
from RMLIB call (this could
be running average in a
min). PA collects this data
every minute and updates
according to the configured
port collection frequency.
For example, consider port
collection is configured for
5 minutes, then every minute
average port data is
collected and stored
in-memory. At the end of 5th
minute, average of all
collected average port data
is calculated.
The minimum frontend I/Os
rate on this port over an
Minimum Port IO  Frontend
entire collection interval. For
example, if collection
interval is set to five minutes,
the minimum port IO value
is collected and verified
Metrics and descriptions 391