Cache Statistics Collection For Volumes And Volume Copies - IBM Storwize V7000 Unified Problem Determination Manual

Table 61. Statistic collection for nodes (continued)
cpu
cpu_core
id
node_id
rb
re
ro
rq
wb
we
wo
wq
Table 62 describes the statistics collection for volumes.
Table 62. Cache statistics collection for volumes and volume copies
Statistic Acronym
read ios ri
write ios wi
busy - Indicates the total CPU average core busy milliseconds since the node
was reset. This statistic reports the amount of the time the processor has
spent polling while waiting for work versus actually doing work. This
statistic accumulates from zero.
comp - Indicates the total CPU average core busy milliseconds for
compression process cores since the node was reset.
system - Indicates the total CPU average core busy milliseconds since the
node was reset. This statistic reports the amount of the time the processor
has spent polling while waiting for work versus actually doing work. This
statistic accumulates from zero. This is the same information as the
information provided with the cpu busy statistic and will eventually replace
the cpu busy statistic.
id - Indicates the CPU core id.
comp - Indicates the per-core CPU average core busy milliseconds for
compression process cores since node was reset.
system - Indicates the per-core CPU average core busy milliseconds for
system process cores since node was reset.
Indicates the name of the node.
Indicates the unique identifier for the node.
Indicates the number of bytes received.
Indicates the accumulated receive latency, excluding inbound queue time.
This statistic is the latency that is experienced by the node communication
layer from the time that an I/O is queued to cache until the time that the
cache gives completion for it.
Indicates the number of messages or bulk data received.
Indicates the accumulated receive latency, including inbound queue time.
This statistic is the latency from the time that a command arrives at the node
communication layer to the time that the cache completes the command.
Indicates the bytes sent.
Indicates the accumulated send latency, excluding outbound queue time. This
statistic is the time from when the node communication layer issues a
message out onto the Fibre Channel until the node communication layer
receives notification that the message has arrived.
Indicates the number of messages or bulk data sent.
Indicates the accumulated send latency, including outbound queue time. This
statistic includes the entire time that data is sent. This time includes the time
from when the node communication layer receives a message and waits for
resources, the time to send the message to the remote node, and the time
taken for the remote node to respond.
Statistics for Statistics for
volume volume
cache copy cache
Yes Yes
Yes Yes
Statistics for Statistics for
volume volume
cache copy cache
partition partition
Statistics for
the Node Cache
Overall statistics for
Cache mdisks
Chapter 5. Control enclosure
Units and
state
ios,
cumulative
ios,
cumulative
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