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By default, all vCPUs for the instance type are active when you launch an instance. When you configure the number of active vCPUs for the instance, it can help you save on licensing costs and optimize performance. The base cost of the instance remains unchanged.
The number of active vCPUs equals the number of threads per CPU core multiplied by
the number of cores. The instance must be in a Stopped state before you make
changes.
Some instance type options do not support this capability. For more information, see Supported CPU options in the Amazon EC2 User Guide.
This is an asynchronous operation using the standard naming convention for .NET 4.5 or higher. For .NET 3.5 the operation is implemented as a pair of methods using the standard naming convention of BeginModifyInstanceCpuOptions and EndModifyInstanceCpuOptions.
Namespace: Amazon.EC2
Assembly: AWSSDK.EC2.dll
Version: 3.x.y.z
public virtual Task<ModifyInstanceCpuOptionsResponse> ModifyInstanceCpuOptionsAsync( ModifyInstanceCpuOptionsRequest request, CancellationToken cancellationToken )
Container for the necessary parameters to execute the ModifyInstanceCpuOptions service method.
A cancellation token that can be used by other objects or threads to receive notice of cancellation.
.NET:
Supported in: 8.0 and newer, Core 3.1
.NET Standard:
Supported in: 2.0
.NET Framework:
Supported in: 4.5 and newer