6.3

Table 1‑83. Devices Metrics for Datastores (Continued)
Metric Key Metric Name Description
devices|totalReadLatency_average Disk Read Latency (ms) Average time taken for a read from the
perspective of a guest operating system.
This metric is the sum of the Kernel Disk
Read Latency and Physical Device Read
Latency metrics.
devices|totalWriteLatency_average Disk Write Latency (ms) Average amount of time for a write
operation to the datastore. Total latency
is the sum of kernel latency and device
latency.
devices|kernelLatency_average Kernel Disk Command Latency
(ms)
Average time spent in ESX Server V.
Kernel per command.
devices|kernelReadLatency_average Kernel Disk Read Latency (ms) Average time spent in ESX host VM
Kernel per read.
devices|kernelWriteLatency_average Kernel Disk Write Latency (ms) Average time spent in ESX Server VM
Kernel per write.
devices|number_running_hosts Number of Running Hosts Number of running hosts that are
powered on.
devices|number_running_vms Number of Running VMs Number of running virtual machines
that are powered on.
devices|deviceLatency_average Physical Device Command
Latency (ms)
Average time taken to complete a
command from the physical device.
devices|deviceReadLatency_average Physical Device Read Latency
(ms)
Average time taken to complete a read
from the physical device.
devices|queueLatency_average Queue Command Latency (ms) Average time spent in the ESX Server
VM Kernel queue per command.
devices|queueReadLatency_average Queue Read Latency (ms) Average time spent in the ESX Server
VM Kernel queue per read.
devices|queueWriteLatency_average Queue Write Latency (ms) Average time spent in the ESX Server
VM Kernel queue per write.
devices|read_average Read Rate (KBps) Amount of data read in the performance
interval.
devices|numberRead_summation Read Requests Number of times data was read from the
disk in the dened interval.
devices|numberReadAveraged_average Reads per second Average number of read commands
issued per second to the datastore
during the collection interval.
devices|usage_average Usage Average (KBps) Average use in kilobytes per second.
devices|write_average Write Rate (KBps) Amount of data wrien to disk in the
performance interval.
devices|numberWrite_summation Write Requests Number of times data was wrien to the
disk in the dened interval.
devices|numberWriteAveraged_average Writes per second Average number of write commands
issued per second to the datastore
during the collection interval.
devices|commandsAveraged_average Commands per second Average number of commands issued
per second during the collection
interval.
devices|deviceWriteLatency_average Physical Device Write Latency
(ms)
Average time taken to complete a write
from the physical disk.
Chapter 1 Metric Definitions in vRealize Operations Manager
VMware, Inc. 59