IBM Storwize V7000 Unified - Page 248

Table 62. Cache statistics collection for volumes and volume copies (continued)
Statistic Acronym
Statistics for
volume
cache
Statistics for
volume
copy cache
Statistics for
volume
cache
partition
Statistics for
volume
copy cache
partition
Statistics for
the Node
Overall
Cache
Cache
statistics for
mdisks
Units and
state
read misses r Yes Yes sectors,
cumulative
read hits rh Yes Yes sectors,
cumulative
flush_through
writes
ft Yes Yes sectors,
cumulative
fast_write
writes
fw Yes Yes sectors,
cumulative
write_through
writes
wt Yes Yes sectors,
cumulative
write hits wh Yes Yes sectors,
cumulative
prefetches p Yes sectors,
cumulative
prefetch hits
(prefetch data
that is read)
ph Yes sectors,
cumulative
prefetch misses
(prefetch pages
that are
discarded
without any
sectors read)
pm Yes pages,
cumulative
modified data m Yes Yes sectors,
snapshot,
non-
cumulative
read and write
cache data
v Yes Yes sectors
snapshot,
non-
cumulative
destages d Yes Yes sectors,
cumulative
fullness
Average
fav Yes Yes %,
non-
cumulative
fullness Max fmx Yes Yes %,
non-
cumulative
fullness Min fmn Yes Yes %,
non-
cumulative
Destage Target
Average
dtav Yes Yes IOs capped
9999,
non-
cumulative
Destage Target
Max
dtmx Yes IOs,
non-
cumulative
Destage Target
Min
dtmn Yes IOs,
non-
cumulative
220 Storwize V7000 Unified: Problem Determination Guide 2073-720