1.0

Table 5-61. Devices Metrics for Datastores (Continued)
Metric Key Metric Name Description
devices | usage_average Usage Average (KBps) Average use in kilobytes per second.
devices | write_average Write Rate (KBps) Amount of data written to disk during the
collection interval.
devices | numberWrite_summation Write Requests Number of times data was written to the
disk during the collection interval.
devices | numberWriteAveraged_average Writes per second Average number of write commands
issued per second to the datastore during
the collection interval.
devices |
commandsAveraged_summation
Commands Average Average number of commands.
devices | queueReadLatency_average Queue Read Latency (ms) Average time spent in the ESX server
VMKernel queue per read.
devices | deviceWriteLatency_average Physical Device Write Latency
(ms)
Average time taken to complete a write
from the physical disk.
Datastore Metrics for Datastores
Datastore metrics provide information about datastore use.
Table 5-62. Datastore Metrics for Datastores
Metric Key Metric Name Description
datastore | totalLatency_average Disk Command Latency (ms) Disk command latency in
milliseconds.
datastore | usage_average Usage Average (KBps) Average use in kilobytes per second.
datastore | totalReadLatency_average Read Latency (ms) Read latency in milliseconds.
datastore | totalWriteLatency_average Write Latency (ms) Write latency in milliseconds.
datastore | demand Demand Demand.
datastore | maxObserved_NumberRead Max Observed Reads per Second Maximum observed reads per second.
datastore | maxObserved_Read Max Observed Read Rate (KBps) Maximum observed read rate in
kilobytes per second.
datastore | maxObserved_ReadLatency Max Observed Read Latency (ms) Maximum observed read latency in
milliseconds.
datastore | maxObserved_NumberWrite Max Observed Writes per second Maximum observed writes per
second.
datastore | maxObserved_Write Max Observed Write Rate (KBps) Maximum observed write rate in
kilobytes per second.
datastore | maxObserved_WriteLatency Max Observed Write Latency (ms) Maximum observed write latency in
milliseconds.
datastore | maxObserved_OIO Max Observed Number of
Outstanding IO Operations
Maximum observed number of
outstanding IO operations.
datastore | hostcount Host Count Host count.
datastore | hostScsiDiskPartition Host SCSI Disk Partition Host SCSI disk partition.
datastore | maxObservedNumberRead Highest Observed Throughput
(KBps)
Highest observed throughput in
kilobytes per second.
datastore | maxObservedRead Highest Observed Read Rate
(KBps)
Highest observed read rate in
kilobytes per second.
Chapter 5 Metrics for vCenter Server Components
VMware, Inc. 57