# ExternalMetricsPreference


 Describes the external metrics preferences for EC2 rightsizing recommendations. 

## Contents


 ** source **   <a name="computeoptimizer-Type-ExternalMetricsPreference-source"></a>
 Contains the source options for external metrics preferences.   
Type: String  
Valid Values: `Datadog | Dynatrace | NewRelic | Instana`   
Required: No

## See Also


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/compute-optimizer-2019-11-01/ExternalMetricsPreference) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/compute-optimizer-2019-11-01/ExternalMetricsPreference) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/compute-optimizer-2019-11-01/ExternalMetricsPreference)