Installation guide

Table C-3. Disk Data Counters (Continued)
Counter Label Description
Entity
V H R C
totalWriteLatency Disk Write
Latency
Average amount of time taken during the collection interval to
process a SCSI write command issued by the Guest OS to the
virtual machine. The sum of kernelWriteLatency and
deviceWriteLatency.
n
Stats Type: absolute
n
Unit: millisecond
n
Collection Level: 2
n
Rollup Type: average
n
VC/ESX: Yes/Yes
o • ο ο
usage Disk Usage Aggregated disk I/O rate. For hosts, this metric includes the
rates for all virtual machines running on the host during the
collection interval.
n
Stats Type: rate
n
Unit: kiloBytesPerSecond
n
Collection Level: 1(4)
n
Rollup Type: average (min/max)
n
VC/ESX: Yes/Yes
• • ο ο
write Disk Write Rate
VM
Rate at which data is written to each
virtual disk on the virtual machine.
Host
Rate at which data is written to each LUN
on the host.
Write rate =
blocksWritten/second * blockSize
n
Stats Type: rate
n
Unit: kiloBytesPerSecond
n
Collection Level: 2
n
Rollup Type: average
n
VC/ESX: Yes/Yes
• • ο ο
Management Agent Metrics
The management agent metric group tracks consumption of resources by the various management agents
(hostd, vpxd, and so on) running on the ESX/ESXi host.
Table C-4 lists the management agent data counters.
NOTE The management agent metrics appear only in the advanced performance charts.
Appendix C Performance Metrics
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