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Performance counters are modeled using the PerfCounterInfo data object type. Each instance of a PerfCounterInfo data object contains metadata about a specific metric available from the system. The virtual disk group of performance counters supports real-time performance metrics (such as latency and read- and write-speeds) for I/O operations on virtual disks. |
| Counter | StatsType | Unit | Levels | Per Device Level |
RollupTypes | Labels | Entity | Instance/ Aggregate |
ESX Versions |
|---|---|---|---|---|---|---|---|---|---|
| busResets | delta | number | 2 | 4 | summation | Virtual Disk Bus Resets | |||
| Number of SCSI-bus reset commands issued during the collection interval. | |||||||||
| commandsAborted | delta | number | 2 | 4 | summation | Virtual Disk Command Aborts | |||
| Number of SCSI commands aborted during the collection interval. | |||||||||
| numberReadAveraged | rate | number | 1 | 1 | average | Average read requests per second | VirtualMachine | instance | 4.1.0 5.0.0 |
| Average number of read commands issued per second to the virtual disk during the collection interval. | |||||||||
| numberWriteAveraged | rate | number | 1 | 1 | average | Average write requests per second | VirtualMachine | instance | 4.1.0 5.0.0 |
| Average number of write commands issued per second to the virtual disk during the collection interval. | |||||||||
| read | rate | kiloBytesPerSecond | 2 | 2 | average | Read rate | VirtualMachine | instance | 4.1.0 5.0.0 |
| Rate of reading data from the virtual disk. | |||||||||
| readLoadMetric | absolute | number | 2 | 2 | latest | Read workload metric | VirtualMachine | instance | 5.0.0 |
| Storage DRS virtual disk metric for the read workload model. | |||||||||
| readOIO | absolute | number | 2 | 2 | latest | Average number of outstanding read requests | VirtualMachine | instance | 5.0.0 |
| Average number of outstanding read requests to the virtual disk during the collection interval. | |||||||||
| throughput.cont | absolute | millisecond | 2 | 4 | average | Virtual Disk Throughput Contention | |||
| Average amount of time for an I/O operation to complete. | |||||||||
| throughput.usage | rate | kiloBytesPerSecond | 2 | 1 | average | Virtual Disk Throughput Usage | |||
| Virtual disk I/O rate. | |||||||||
| totalReadLatency | absolute | millisecond | 1 | 1 | average | Read latency | VirtualMachine | instance | 4.1.0 5.0.0 |
| Average amount of time for a read operation from the virtual disk. Total latency = kernel latency + device latency. | |||||||||
| totalWriteLatency | absolute | millisecond | 1 | 1 | average | Write latency | VirtualMachine | instance | 4.1.0 5.0.0 |
| Average amount of time for a write operation to the virtual disk. Total latency = kernel latency + device latency. | |||||||||
| write | rate | kiloBytesPerSecond | 2 | 2 | average | Write rate | VirtualMachine | instance | 4.1.0 5.0.0 |
| Rate of writing data from the virtual disk. | |||||||||
| writeLoadMetric | absolute | number | 2 | 2 | latest | Write workload metric | VirtualMachine | instance | 5.0.0 |
| Storage DRS virtual disk metric for the write workload model. | |||||||||
| writeOIO | absolute | number | 2 | 2 | latest | Average number of outstanding write requests | VirtualMachine | instance | 5.0.0 |
| Average number of outstanding write requests to the virtual disk during the collection interval. | |||||||||
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