# MetricReference
<a name="API_MetricReference"></a>

This structure contains information about one CloudWatch metric associated with this entity discovered by Application Signals.

## Contents
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 ** MetricName **   <a name="applicationsignals-Type-MetricReference-MetricName"></a>
The name of the metric.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 255.  
Required: Yes

 ** MetricType **   <a name="applicationsignals-Type-MetricReference-MetricType"></a>
Used to display the appropriate statistics in the CloudWatch console.  
Type: String  
Pattern: `[A-Za-z0-9 -]+`   
Required: Yes

 ** Namespace **   <a name="applicationsignals-Type-MetricReference-Namespace"></a>
The namespace of the metric. For more information, see [CloudWatchNamespaces](https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/cloudwatch_concepts.html#Namespace).  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 255.  
Pattern: `.*[^:].*`   
Required: Yes

 ** AccountId **   <a name="applicationsignals-Type-MetricReference-AccountId"></a>
 AWS account ID.  
Type: String  
Pattern: `[0-9]{12}`   
Required: No

 ** Dimensions **   <a name="applicationsignals-Type-MetricReference-Dimensions"></a>
An array of one or more dimensions that further define the metric. For more information, see [CloudWatchDimensions](https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/cloudwatch_concepts.html#Dimension).  
Type: Array of [Dimension](API_Dimension.md) objects  
Array Members: Minimum number of 0 items. Maximum number of 30 items.  
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/application-signals-2024-04-15/MetricReference) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/application-signals-2024-04-15/MetricReference) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/application-signals-2024-04-15/MetricReference)