AWS CloudFormation
User Guide (Version )

AWS::AutoScaling::ScalingPolicy StepAdjustment

StepAdjustments is a subproperty of ScalingPolicy that represents a step adjustment for a step scaling policy.

For the following examples, suppose that you have an alarm with a breach threshold of 50:

  • To trigger a step adjustment when the metric is greater than or equal to 50 and less than 60, specify a lower bound of 0 and an upper bound of 10.

  • To trigger a step adjustment when the metric is greater than 40 and less than or equal to 50, specify a lower bound of -10 and an upper bound of 0.

For more information, see Step Adjustments in the Amazon EC2 Auto Scaling User Guide.

Syntax

To declare this entity in your AWS CloudFormation template, use the following syntax:

JSON

{ "MetricIntervalLowerBound" : Double, "MetricIntervalUpperBound" : Double, "ScalingAdjustment" : Integer }

Properties

MetricIntervalLowerBound

The lower bound for the difference between the alarm threshold and the CloudWatch metric. If the metric value is above the breach threshold, the lower bound is inclusive (the metric must be greater than or equal to the threshold plus the lower bound). Otherwise, it is exclusive (the metric must be greater than the threshold plus the lower bound). A null value indicates negative infinity.

You must specify at least one upper or lower bound.

Required: Conditional

Type: Double

Update requires: No interruption

MetricIntervalUpperBound

The upper bound for the difference between the alarm threshold and the CloudWatch metric. If the metric value is above the breach threshold, the upper bound is exclusive (the metric must be less than the threshold plus the upper bound). Otherwise, it is inclusive (the metric must be less than or equal to the threshold plus the upper bound). A null value indicates positive infinity.

You must specify at least one upper or lower bound.

Required: Conditional

Type: Double

Update requires: No interruption

ScalingAdjustment

The amount by which to scale. The adjustment is based on the value that you specified in the AdjustmentType property (either an absolute number or a percentage). A positive value adds to the current capacity and a negative number subtracts from the current capacity.

Required: Yes

Type: Integer

Update requires: No interruption

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