VMware ESX 4.0 - GETTING STARTED UPDATE 1 Guía de instalación Pagina 340

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Table C-3. Disk Data Counters (Continued)
Counter Label Description
Entity
V H R C
queueReadLatency Queue Read
Latency
Average amount of time taken during the collection interval per
SCSI read command in the VMKernel queue.
n
Stats Type: absolute
n
Unit: millisecond
n
Rollup Type: average
n
Collection Level: 2
n
VC/ESX: Yes/Yes
o ο ο
queueWriteLatency Queue Write
Latency
Average amount time taken during the collection interval per
SCSI write command in the VMKernel queue.
n
Stats Type: absolute
n
Unit: millisecond
n
Rollup Type: average
n
Collection Level: 2
n
VC/ESX: Yes/Yes
o ο ο
read Disk Read Rate
VM
Rate at which data is read from each
virtual disk on the virtual machine.
Host
Rate at which data is read from each LUN
on the host.
read rate = # blocksRead per
second × blockSize
n
Stats Type: rate
n
Unit: kiloBytesPerSecond
n
Rollup Type: average
n
Collection Level: 2
n
VC/ESX: Yes/Yes
ο ο
totalLatency Disk Command
Latency
Average amount of time taken during the collection interval to
process a SCSI command issued by the Guest OS to the virtual
machine. The sum of kernelLatency and deviceLatency.
n
Stats Type: absolute
n
Unit: millisecond
n
Collection Level: 2
n
Rollup Type: average
n
VC/ESX: Yes/Yes
o ο ο
totalReadLatency Disk Read
Latency
Average amount of time taken during the collection interval to
process a SCSI read command issued from the Guest OS to the
virtual machine. The sum of kernelReadLatency and
deviceReadLatency.
n
Stats Type: absolute
n
Unit: millisecond
n
Collection Level: 2
n
Rollup Type: average
n
VC/ESX: Yes/Yes
o ο ο
vSphere Basic System Administration
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