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# Power 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 Power group (power) of performance counters tracks performance metrics for power resources.

Counter | StatsType | Unit | Level | Per Device Level | RollupType | Label | Entity | Instance/ Aggregate | ESX Versions
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
capacity.usable | absolute | watt | 4 | 4 | average | Host Power Capacity Usable |  |  |
Current maximum allowed power usage.
capacity.usage | absolute | watt | 4 | 4 | average | Host Power Capacity Usage |  |  |
Current power usage.
capacity.usagePct | absolute | percent | 4 | 4 | average | Host Power Capacity Provisioned |  |  |
Current power usage as a percentage of maximum allowed power.
capacity.usageIdle | absolute | watt | 2 | 3 | average | Host Power Capacity Usage - Idle | HostSystem | aggregate |
Power usage due to host idleness.
capacity.usageSystem | absolute | watt | 2 | 3 | average | Host Power Capacity Usage - System | HostSystem | aggregate |
Power usage due to non-VM activities.
capacity.usageVm | absolute | watt | 2 | 3 | average | Host Power Capacity Usage - VM | HostSystem | aggregate |
Power usage due to VM workloads.
energy | delta | joule | 3 | 3 | summation | Energy usage | VirtualMachine HostSystem | aggregate | 5.0 5.1 5.5 6.0 6.5 6.7
Total energy used since last stats reset.
power | rate | watt | 2 | 3 | average | Usage | VirtualMachine HostSystem | aggregate | 5.0 5.1 5.5 6.0 6.5 6.7
Current power usage.
powerCap | absolute | watt | 3 | 3 | average | Cap | HostSystem | aggregate | 5.0 5.1 5.5 6.0 6.5 6.7
Maximum allowed power usage.

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