aws-cdk-lib.aws_applicationautoscaling.TargetTrackingScalingPolicyProps

TargetTrackingScalingPolicyProps Struct

Properties for a concrete TargetTrackingPolicy.

Adds the scalingTarget.

TargetTrackingScalingPolicyProps

extends

• BasicTargetTrackingScalingPolicyProps

Source

aws-applicationautoscaling/lib/target-tracking-scaling-policy.ts

Type last changed

v2.234.0 · 8 Jan 2026

Example

// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import * as cdk from 'aws-cdk-lib';
import { aws_applicationautoscaling as appscaling } from 'aws-cdk-lib';
import { aws_cloudwatch as cloudwatch } from 'aws-cdk-lib';
import { aws_applicationautoscaling as interfaces_applicationautoscaling } from 'aws-cdk-lib/interfaces';

declare const metric: cloudwatch.Metric;
declare const scalableTargetRef: interfaces_applicationautoscaling.IScalableTargetRef;
const targetTrackingScalingPolicyProps: appscaling.TargetTrackingScalingPolicyProps = {
  scalingTarget: scalableTargetRef,
  targetValue: 123,

  // the properties below are optional
  customMetric: metric,
  disableScaleIn: false,
  policyName: 'policyName',
  predefinedMetric: appscaling.PredefinedMetric.APPSTREAM_AVERAGE_CAPACITY_UTILIZATION,
  resourceLabel: 'resourceLabel',
  scaleInCooldown: cdk.Duration.minutes(30),
  scaleOutCooldown: cdk.Duration.minutes(30),
};

Properties

customMetricIMetriccustom_metricIMetriccustomMetricIMetricCustomMetricIMetricCustomMetricIMetric= No custom metric.#

A custom metric for application autoscaling.

notes

The metric must track utilization. Scaling out will happen if the metric is higher than the target value, scaling in will happen in the metric is lower than the target value.

The metric must be in the same account and region as the scaling policy.

Exactly one of customMetric or predefinedMetric must be specified.

disableScaleInbooleandisable_scale_inbooldisableScaleInBooleanDisableScaleInboolDisableScaleIn*bool= false#

Indicates whether scale in by the target tracking policy is disabled.

If the value is true, scale in is disabled and the target tracking policy won't remove capacity from the scalable resource. Otherwise, scale in is enabled and the target tracking policy can remove capacity from the scalable resource.

policyNamestringpolicy_namestrpolicyNameStringPolicyNamestringPolicyName*string= Automatically generated name.#

A name for the scaling policy.

predefinedMetricPredefinedMetricpredefined_metricPredefinedMetricpredefinedMetricPredefinedMetricPredefinedMetricPredefinedMetricPredefinedMetricPredefinedMetric= No predefined metrics.#

A predefined metric for application autoscaling.

notes

The metric must track utilization. Scaling out will happen if the metric is higher than the target value, scaling in will happen in the metric is lower than the target value.

Exactly one of customMetric or predefinedMetric must be specified.

resourceLabelstringresource_labelstrresourceLabelStringResourceLabelstringResourceLabel*string= No resource label.#

Identify the resource associated with the metric type.

Only used for predefined metric ALBRequestCountPerTarget.

Example value: app/<load-balancer-name>/<load-balancer-id>/targetgroup/<target-group-name>/<target-group-id>

scaleInCooldownDurationscale_in_cooldownDurationscaleInCooldownDurationScaleInCooldownDurationScaleInCooldownDuration= Duration.seconds(300) for the fo…#

Period after a scale in activity completes before another scale in activity can start.

default

Default: Duration.seconds(300) for the following scalable targets: ECS services, Spot Fleet requests, EMR clusters, AppStream 2.0 fleets, Aurora DB clusters, Amazon SageMaker endpoint variants, Custom resources. For all other scalable targets, the default value is Duration.seconds(0): DynamoDB tables, DynamoDB global secondary indexes, Amazon Comprehend document classification endpoints, Lambda provisioned concurrency

scaleOutCooldownDurationscale_out_cooldownDurationscaleOutCooldownDurationScaleOutCooldownDurationScaleOutCooldownDuration= Duration.seconds(300) for the fo…#

Period after a scale out activity completes before another scale out activity can start.

default

Default: Duration.seconds(300) for the following scalable targets: ECS services, Spot Fleet requests, EMR clusters, AppStream 2.0 fleets, Aurora DB clusters, Amazon SageMaker endpoint variants, Custom resources. For all other scalable targets, the default value is Duration.seconds(0): DynamoDB tables, DynamoDB global secondary indexes, Amazon Comprehend document classification endpoints, Lambda provisioned concurrency

scalingTargetIScalableTargetRefscaling_targetIScalableTargetRefscalingTargetIScalableTargetRefScalingTargetIScalableTargetRefScalingTargetIScalableTargetRefrequired#

targetValuenumbertarget_valueint | floattargetValueNumberTargetValuedoubleTargetValue*float64required#

The target value for the metric.

Used as props by

• TargetTrackingScalingPolicy