# Monitor Apache Spark with CloudWatch metrics
<a name="notebooks-spark-metrics"></a>

Athena publishes calculation-related metrics to Amazon CloudWatch when the **[Publish CloudWatch metrics](notebooks-spark-getting-started.md#notebook-gs-metrics)** option for your Spark-enabled workgroup is selected. You can create custom dashboards, set alarms and triggers on metrics in the CloudWatch console. 

Athena publishes the following metric to the CloudWatch console under the `AmazonAthenaForApacheSpark` namespace:
+ `DPUCount` – number of DPUs consumed during the session to execute the calculations.

This metric has the following dimensions:
+ `SessionId` – The ID of the session in which the calculations are submitted.
+ `WorkGroup` – Name of the workgroup.

**To view metrics for Spark-enabled workgroups in the Amazon CloudWatch console**

1. Open the CloudWatch console at [https://console.aws.amazon.com/cloudwatch/](https://console.aws.amazon.com/cloudwatch/).

1. In the navigation pane, choose **Metrics**, **All metrics**.

1. Select the **AmazonAthenaForApacheSpark** namespace.

**To view metrics with the CLI**
+ Do one of the following:
  + To list the metrics for Athena Spark-enabled workgroups, open a command prompt, and use the following command:

    ```
    aws cloudwatch list-metrics --namespace "AmazonAthenaForApacheSpark"
    ```
  + To list all available metrics, use the following command:

    ```
    aws cloudwatch list-metrics
    ```

## List of CloudWatch metrics and dimensions for Apache Spark calculations in Athena
<a name="notebooks-spark-metrics-metrics-table"></a>

If you've enabled CloudWatch metrics in your Spark-enabled Athena workgroup, Athena sends the following metric to CloudWatch per workgroup. The metric uses the `AmazonAthenaForApacheSpark` namespace.


****  

| Metric name | Description | 
| --- | --- | 
| DPUCount  | Number of DPUs (data processing units) consumed during the session to execute the calculations. A DPU is a relative measure of processing power that consists of 4 vCPUs of compute capacity and 16 GB of memory. | 

This metric has the following dimensions.


| Dimension | Description | 
| --- | --- | 
| SessionId |  The ID of the session in which the calculations are submitted.  | 
| WorkGroup |  The name of the workgroup.  | 

## List of CloudWatch metrics and dimensions for Athena Spark interactive sessions
<a name="notebooks-spark-metrics-interactive-sessions"></a>

In the release version Apache Spark version 3.5, if you've enabled CloudWatch metrics in your Athena Spark workgroup, Athena sends the following metric to CloudWatch. The metric uses the `AmazonAthenaForApacheSpark` namespace.


****  

| Name | Description | 
| --- | --- | 
| DPUConsumed | The number of DPUs actively consumed by queries in a RUNNING state at a given time in the workgroup. | 

This metric has the following dimensions.


| Dimension | Description | 
| --- | --- | 
| Account |  The AWS account ID.  | 
| WorkGroup |  The name of the workgroup.  |