capacity
The minimum number of pay-as-you-go instances that must be contained in the scaling group. When the actual number of pay-as-you-go instances in the scaling group drops below the value of this parameter, Auto Scaling preferentially creates pay-as-you-go instances. Valid values: 0 to 1000. If you set 'multi_az_policy' to COMPOSABLE, the default value of this parameter is 0.