# ScalingPolicy
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Describes a scaling policy.

## Contents
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 ** AdjustmentType **   
Specifies how the scaling adjustment is interpreted (for example, an absolute number or a percentage). The valid values are `ChangeInCapacity`, `ExactCapacity`, and `PercentChangeInCapacity`.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 255.  
Pattern: `[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*`   
Required: No

 ** Alarms.member.N **   
The CloudWatch alarms related to the policy.  
Type: Array of [Alarm](API_Alarm.md) objects  
Required: No

 ** AutoScalingGroupName **   
The name of the Auto Scaling group.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 255.  
Pattern: `[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*`   
Required: No

 ** Cooldown **   
The duration of the policy's cooldown period, in seconds.  
Type: Integer  
Required: No

 ** Enabled **   
Indicates whether the policy is enabled (`true`) or disabled (`false`).  
Type: Boolean  
Required: No

 ** EstimatedInstanceWarmup **   
The estimated time, in seconds, until a newly launched instance can contribute to the CloudWatch metrics.  
Type: Integer  
Required: No

 ** MetricAggregationType **   
The aggregation type for the CloudWatch metrics. The valid values are `Minimum`, `Maximum`, and `Average`.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 32.  
Pattern: `[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*`   
Required: No

 ** MinAdjustmentMagnitude **   
The minimum value to scale by when the adjustment type is `PercentChangeInCapacity`.   
Type: Integer  
Required: No

 ** MinAdjustmentStep **   
 *This member has been deprecated.*   
Available for backward compatibility. Use `MinAdjustmentMagnitude` instead.  
Type: Integer  
Required: No

 ** PolicyARN **   
The Amazon Resource Name (ARN) of the policy.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 1600.  
Pattern: `[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*`   
Required: No

 ** PolicyName **   
The name of the scaling policy.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 255.  
Pattern: `[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*`   
Required: No

 ** PolicyType **   
One of the following policy types:   
+  `TargetTrackingScaling` 
+  `StepScaling` 
+  `SimpleScaling` (default)
+  `PredictiveScaling` 
For more information, see [Target tracking scaling policies](https://docs.amazonaws.cn/autoscaling/ec2/userguide/as-scaling-target-tracking.html) and [Step and simple scaling policies](https://docs.amazonaws.cn/autoscaling/ec2/userguide/as-scaling-simple-step.html) in the *Amazon EC2 Auto Scaling User Guide*.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 64.  
Pattern: `[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*`   
Required: No

 ** PredictiveScalingConfiguration **   
A predictive scaling policy.  
Type: [PredictiveScalingConfiguration](API_PredictiveScalingConfiguration.md) object  
Required: No

 ** ScalingAdjustment **   
The amount by which to scale, based on the specified adjustment type. A positive value adds to the current capacity while a negative number removes from the current capacity.  
Type: Integer  
Required: No

 ** StepAdjustments.member.N **   
A set of adjustments that enable you to scale based on the size of the alarm breach.  
Type: Array of [StepAdjustment](API_StepAdjustment.md) objects  
Required: No

 ** TargetTrackingConfiguration **   
A target tracking scaling policy.  
Type: [TargetTrackingConfiguration](API_TargetTrackingConfiguration.md) object  
Required: No

## See Also
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For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon SDK for C\$1\$1](https://docs.amazonaws.cn/goto/SdkForCpp/autoscaling-2011-01-01/ScalingPolicy) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/autoscaling-2011-01-01/ScalingPolicy) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/autoscaling-2011-01-01/ScalingPolicy)