Datastore Counters

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 datastore group of performance counters supports real-time performance metrics (such as latency and read- and write-speeds) for I/O operations on datastores.

Legend:V=VirtualMachine|H=HostSystem|R=ResourcePool|C=ComputeResource|D=OtherDevice
Counter StatsType Unit Levels RollupTypes Labels      Entity
VHRC
read ratekiloBytesPerSecond2averageRead rate οο
Rate of reading data from the datastore.
write ratekiloBytesPerSecond3averageWrite rate οο
Rate of writing data to the datastore.
numberReadAveraged ratenumber2averageAverage read requests per second οο
Average number of read commands issued per second to the datastore during the collection interval.
numberWriteAveraged ratenumber2averageAverage write requests per second οο
Average number of write commands issued per second to the datastore during the collection interval.
totalReadLatency absolutemillisecond2averageRead latency οο
Average amount of time for a read operation from the datastore. Total latency = kernel latency + device latency.
totalWriteLatency absolutemillisecond2averageWrite latency οο
Average amount of time for a write operation to the datastore. Total latency = kernel latency + device latency.
sizeNormalizedDatastoreLatency absolutemicrosecond2averageStorage I/O Control normalized latency οο
Normalized latency in microseconds on the datastore. Data for all virtual machines is combined.
datastoreIops absolutenumber2averageStorage I/O Control aggregated IOPS οο
Aggregate number of IO operations on the datastore.