Back to PerformanceManager

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.

Counter StatsType Unit Levels Per
Device
Level		 RollupTypes Labels Entity Instance/
Aggregate		 ESX
Versions
busResets deltanumber22summation Bus resets Datastoreinstance
Number of SCSI-bus reset commands issued during the collection interval.
commandsAborted deltanumber22summation Datastore Command Aborts Datastoreinstance
Number of SCSI commands aborted during the collection interval.
datastoreIops absolutenumber13average Storage I/O Control aggregated IOPS HostSysteminstance5.0
5.1
5.5
6.0
6.5
6.7
Average amount of time for an I/O operation to the datastore or LUN across all ESX hosts accessing it.
datastoreMaxQueueDepth absolutenumber13latest Storage I/O Control datastore maximum queue depth HostSysteminstance5.0
5.1
5.5
6.0
6.5
6.7
datastoreNormalReadLatency absolutenumber22latest Storage DRS datastore normalized read latency HostSysteminstance5.0
5.1
5.5
6.0
6.5
6.7
datastoreNormalWriteLatency absolutenumber22latest Storage DRS datastore normalized write latency HostSysteminstance5.0
5.1
5.5
6.0
6.5
6.7
datastoreReadBytes absolutenumber22latest Storage DRS datastore bytes read HostSysteminstance5.0
5.1
5.5
6.0
6.5
6.7
datastoreReadIops absolutenumber13latest Storage DRS datastore read I/O rate HostSysteminstance5.0
5.1
5.5
6.0
6.5
6.7
datastoreReadLoadMetric absolutenumber44latest Storage DRS datastore read workload metric HostSysteminstance5.0
5.1
5.5
6.0
6.5
6.7
Storage DRS datastore metric for read workload model
datastoreReadOIO absolutenumber13latest Storage DRS datastore outstanding read requests HostSysteminstance5.0
5.1
5.5
6.0
6.5
6.7
datastoreVMObservedLatency absolutemicrosecond13latest Datastore latency observed by VMs HostSysteminstance5.1
5.5
6.0
6.5
6.7
The average datastore latency as seen by virtual machines
datastoreWriteBytes absolutenumber22latest Storage DRS datastore bytes written HostSysteminstance5.0
5.1
5.5
6.0
6.5
6.7
datastoreWriteIops absolutenumber13latest Storage DRS datastore write I/O rate HostSysteminstance5.0
5.1
5.5
6.0
6.5
6.7
datastoreWriteLoadMetric absolutenumber44latest Storage DRS datastore write workload metric HostSysteminstance5.0
5.1
5.5
6.0
6.5
6.7
Storage DRS datastore metric for write workload model
datastoreWriteOIO absolutenumber13latest Storage DRS datastore outstanding write requests HostSysteminstance5.0
5.1
5.5
6.0
6.5
6.7
maxTotalLatency absolutemillisecond33latest Highest latency VirtualMachine
HostSystem		aggregate5.0
5.1
5.5
6.0
6.5
6.7
Highest latency value across all datastores used by the host
numberReadAveraged ratenumber13average Average read requests per second VirtualMachine
HostSystem
Datastore		aggregate5.0
5.1
5.5
6.0
6.5
6.7
Average number of read commands issued per second to the datastore during the collection interval
numberWriteAveraged ratenumber13average Average write requests per second VirtualMachine
HostSystem
Datastore		aggregate5.0
5.1
5.5
6.0
6.5
6.7
Average number of write commands issued per second to the datastore during the collection interval
read ratekiloBytesPerSecond22average Read rate VirtualMachine
HostSystem		instance5.0
5.1
5.5
6.0
6.5
6.7
Rate of reading data from the datastore
siocActiveTimePercentage absolutepercent13average Storage I/O Control active time percentage HostSysteminstance5.1
5.5
6.0
6.5
6.7
Percentage of time Storage I/O Control actively controlled datastore latency
sizeNormalizedDatastoreLatency absolutemicrosecond13average Storage I/O Control normalized latency HostSysteminstance5.0
5.1
5.5
6.0
6.5
6.7
Storage I/O Control size-normalized I/O latency
throughput.contention absolutemillisecond44average Datastore Throughput Contention Datastoreinstance5.0
5.1
5.5
6.0
6.5
6.7
Average amount of time for an I/O operation to the datastore or LUN across all ESX hosts accessing it.
throughput.usage absolutekiloBytesPerSecond44average Datastore Throughput Usage Datastoreinstance5.0
5.1
5.5
6.0
6.5
6.7
The current bandwidth usage for the datastore or LUN.
totalReadLatency absolutemillisecond13average Read latency VirtualMachine
HostSystem		instance5.0
5.1
5.5
6.0
6.5
6.7
Average amount of time for a read operation from the datastore. Total latency = kernel latency + device latency.
totalWriteLatency absolutemillisecond13average Write latency VirtualMachine
HostSystem		instance5.0
5.1
5.5
6.0
6.5
6.7
Average amount of time for a write operation to the datastore. Total latency = kernel latency + device latency.
write ratekiloBytesPerSecond22average Write rate VirtualMachine
HostSystem		instance5.0
5.1
5.5
6.0
6.5
6.7
Rate of writing data to the datastore

 

Back to Top of page
Back to PerformanceManager