instance
The instance type of the instance. You can call the DescribeInstanceTypes operation to query instance types. If you do not specify this parameter, an instance type that provides the fewest vCPUs and memory resources is automatically selected. This configuration is subject to resource availability of instance types. For example, the ecs.g6.large instance type is selected by default. If available ecs.g6.large resources are insufficient, the ecs.g6.xlarge instance type is selected.