Measure Reference Manual

Counter TypeDescriptionSubfield
N.A.Number of cache blocks allocated. When TOTALS ONLY
or TOTALS INCLUDE is used, this value is the maximum
BLKS
number of cache blocks allocated. BLKS is not a counter
but a value obtained from an internal disk process data
structure.
QueueTime that cache blocks spent dirty. A cache block is dirty
when a buffered write operation writes data to it. After the
BLKS-DIRTY-QTIME
disk process writes the dirty cache block to disk, the block
is clean.
Max queueMaximum number of items on the queue described by the
BLKS-DIRTY-QTIME counter.
BLKS-DIRTY-MAX
In Measure output, each subfield provides four values, one for each size of DP2 cache block:
Cache block sizeField label
512 bytesC0
1024 bytesC1
2048 bytesC2
4096 bytesC3
CBLKS-INUSE-MAX
(Legacy Style only) No longer used.
CBLKS-INUSE-QTIME
(Legacy Style only) No longer used.
CN
(Legacy Style only) Disk cache metrics. This field is divided into these subfields:
Counter TypeDescriptionSubfield
N.A.Number of cache blocks allocated. When
TOTALS ONLY or TOTALS INCLUDE is used, this
BLKS
value is the maximum number of cache blocks
allocated. BLKS is not a counter but a value
obtained from an internal disk process data
structure.
SnapshotNumber of cache blocks that were in use at the
beginning of the measurement. This value is part
BLKS-INUSE-START
of the structured DISC record but does not appear
in Legacy Style DISC reports. When TOTALS
ONLY or TOTALS INCLUDE is used, this value is
the total number of cache blocks in use at the
beginning of the measurement.
SnapshotNumber of cache blocks that were in use at the
end of the measurement or at measurement
BLKS-INUSE-END
interval copy time. When TOTALS ONLY or
TOTALS INCLUDE is used, this value is the total
number of cache blocks in use at the end of the
measurement or at measurement interval copy
time.
DISC 203