HP 3PAR System Reporter Software - Manual (Page 322)

10.30 The Sample Data and Inventory Tables
3PAR System Reporter User’s Guide System Reporter 2.8
10.4.9 Common Performance Table Columns
The statport, statvlun, statld and statpd tables all have a common set of columns for the
performance data. These columns are described in Table 10-19 .
Table 10-19. Common Performance Columns
Column Type Comment
begin DOUBLE PRECISION NOT
NULL
Timestamp value indicating when the
counting started (typically when the system
was rebooted or the device was created).
Two count samples should only be
compared if the begin value is the same for
the two samples. For example, the
difference between rcount values of two
samples represents the number of read
operations in the interval between those
samples only if the begin values are the
same for those samples.
d_begin DOUBLE PRECISION NOT
NULL
Difference between begin value from last
sample for the same object.
now DOUBLE PRECISION NOT
NULL
Timestamp value in microseconds. The
difference in the now values of two
samples should be used in calculating the
time interval between two samples
d_now DOUBLE PRECISION NOT
NULL
Difference between now value from last
sample for the same object.
qlen DOUBLE PRECISION NOT
NULL
Queue length at the time of the sample.
qlen is an instantaneous measure, not an
average queue length over the sample
period.
qlen may not be available for all objects
and its value will be negative to indicate
that it is invalid.