# TargetTrackingScalingConfiguration
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Defines when a new instance is auto-scaled into the compute fleet.

## Contents
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**Note**  
In the following list, the required parameters are described first.

 ** metricType **   <a name="CodeBuild-Type-TargetTrackingScalingConfiguration-metricType"></a>
The metric type to determine auto-scaling.  
Type: String  
Valid Values: `FLEET_UTILIZATION_RATE`   
Required: No

 ** targetValue **   <a name="CodeBuild-Type-TargetTrackingScalingConfiguration-targetValue"></a>
The value of `metricType` when to start scaling.  
Type: Double  
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/codebuild-2016-10-06/TargetTrackingScalingConfiguration) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/codebuild-2016-10-06/TargetTrackingScalingConfiguration) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/codebuild-2016-10-06/TargetTrackingScalingConfiguration)