This is the new *CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [AWS CloudFormation User Guide](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/Welcome.html).

# AWS::Lambda::EventSourceMapping MetricsConfig
<a name="aws-properties-lambda-eventsourcemapping-metricsconfig"></a>

The metrics configuration for your event source. Use this configuration object to define which metrics you want your event source mapping to produce.

## Syntax
<a name="aws-properties-lambda-eventsourcemapping-metricsconfig-syntax"></a>

To declare this entity in your CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-lambda-eventsourcemapping-metricsconfig-syntax.json"></a>

```
{
  "[Metrics](#cfn-lambda-eventsourcemapping-metricsconfig-metrics)" : [ String, ... ]
}
```

### YAML
<a name="aws-properties-lambda-eventsourcemapping-metricsconfig-syntax.yaml"></a>

```
  [Metrics](#cfn-lambda-eventsourcemapping-metricsconfig-metrics): 
    - String
```

## Properties
<a name="aws-properties-lambda-eventsourcemapping-metricsconfig-properties"></a>

`Metrics`  <a name="cfn-lambda-eventsourcemapping-metricsconfig-metrics"></a>
 The metrics you want your event source mapping to produce, including `EventCount`, `ErrorCount`, `KafkaMetrics`.   
+ `EventCount` to receive metrics related to the number of events processed by your event source mapping.
+ `ErrorCount` (Amazon MSK and self-managed Apache Kafka) to receive metrics related to the number of errors in your event source mapping processing.
+ `KafkaMetrics` (Amazon MSK and self-managed Apache Kafka) to receive metrics related to the Kafka consumers from your event source mapping.
 For more information about these metrics, see [ Event source mapping metrics](https://docs.aws.amazon.com/lambda/latest/dg/monitoring-metrics-types.html#event-source-mapping-metrics).   
*Required*: No  
*Type*: Array of String  
*Allowed values*: `EventCount | ErrorCount | KafkaMetrics`  
*Minimum*: `0`  
*Maximum*: `3`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)