6.3

Disk Metrics for Host Systems
Disk metrics provide information about disk use.
Table 1‑34. Disk Metrics for Host Systems
Metric Key Metric Name Description
disk|usage_average Usage Rate (KBps) Average of the sum of the data read
and wrien for all of the disk
instances of the host or virtual
machine.
disk|usage_capacity I/O Usage Capacity I/O Usage Capacity.
disk|commandsAveraged_average Commands per second Average number of commands
issued per second during the
collection interval.
disk|totalLatency_average Disk Command Latency (ms) The average amount of time taken
for a command from the
perspective of a Guest OS. This is
the sum of Kernel Command
Latency and Physical Device
Command Latency.
disk|numberReadAveraged_average Reads per second Average number of read
commands issued per second
during the collection interval.
disk|numberWriteAveraged_average Writes per second Average number of write
commands issued per second
during the collection interval.
disk|numberRead_summation Read Requests Number of times data was read
from the disk in the dened
interval.
disk|numberWrite_summation Write Requests Number of times data was wrien
to the disk in the dened interval.
disk|read_average Read Rate Amount of data read in the
performance interval.
disk|write_average Write Rate Amount of data wrien to disk in
the performance interval.
disk|busResets_summation Bus Resets The number of bus resets in the
performance interval.
disk|commands_summation Commands Issued The number of disk commands
issued in the performance interval.
disk|commandsAborted_summation Commands Aborted The number of disk commands
aborted in the performance
interval.
disk|deviceReadLatency_average Physical Device Read Latency (ms) The average time taken to complete
a read from the physical device.
disk|kernelReadLatency_average Kernel Disk Read Latency (ms) The average time spent in ESX
Server VMKernel per read.
disk|totalReadLatency_average Disk Read Latency (ms) The average amount of time taken
for a read from the perspective of a
Guest OS. This is the sum of Kernel
Read Latency and Physical Device
Read Latency.
disk|queueReadLatency_average Queue Read Latency (ms) The average time spent in the ESX
Server VMKernel queue per read.
vRealize Operations Definitions for Metrics, Properties, and Alerts
30 VMware, Inc.