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2 Under Software, select Advanced Settings.
3 Click Power in the left pane.
4 In the right pane, you can edit the power management parameters that affect the Custom policy.
Power management parameters that affect the Custom policy have descriptions that begin with In
Custom policy. All other power parameters affect all power management policies.
NOTE The default values of power management parameters match the Balanced policy.
Parameter Description
Power.UsePStates
Use ACPI P-states to save power when the processor is busy.
Power.MaxCpuLoad
Use P-states to save power on a CPU only when the CPU is busy for less
than the given percentage of real time.
Power.MinFreqPct
Do not use any P-states slower than the given percentage of full CPU
speed.
Power.UseStallCtr
Use a deeper P-state when the processor is frequently stalled waiting for
events such as cache misses.
Power.TimerHz
Controls how many times per second ESXi reevaluates which P-state each
CPU should be in.
Power.UseCStates
Use deep ACPI C-states (C2 or below) when the processor is idle.
Power.CStateMaxLatency
Do not use C-states whose latency is greater than this value.
Power.CStateResidencyCoef
When a CPU becomes idle, choose the deepest C-state whose latency
multiplied by this value is less than the host's prediction of how long the
CPU will remain idle. Larger values make ESXi more conservative about
using deep C-states, while smaller values are more aggressive.
Power.CStatePredictionCoef
A parameter in the ESXi algorithm for predicting how long a CPU that
becomes idle will remain idle. Changing this value is not recommended.
Power.PerfBias
Performance Energy Bias Hint (Intel-only). Sets an MSR on Intel processors
to an Intel-recommended value. Intel recommends 0 for high performance,
6 for balanced, and 15 for low power. Other values are undefined.
Administering Memory Resources
Using the vSphere Client you can view information about and make changes to memory allocation settings.
To administer your memory resources effectively, you must also be familiar with memory overhead, idle
memory tax, and how ESXi hosts reclaim memory.
When administering memory resources, you can specify memory allocation. If you do not customize
memory allocation, the ESXi host uses defaults that work well in most situations.
You can specify memory allocation in several ways.
n
Use the attributes and special features available through the vSphere Client. The vSphere Client user
interface allows you to connect to the ESXi host or vCenter Server system.
n
Use advanced settings.
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Use the vSphere SDK for scripted memory allocation.
Enable Host-Local Swap for a DRS Cluster
Host-local swap allows you to specify a datastore stored locally on the host as the swap file location. You
can enable host-local swap for a DRS cluster.
Prerequisites
Launch the vSphere Client and log in to a vCenter Server system.
Chapter 25 Resource Management for Single Hosts
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