Accessing CloudWatch metrics - Amazon Simple Storage Service
This documentation is a draft for private preview for regions in the AWS European Sovereign Cloud. Documentation content will continue to evolve. Published: January 1, 2026.

Accessing CloudWatch metrics

You can use the following procedures to view the storage metrics for Amazon S3. To get the Amazon S3 metrics involved, you must set a start and end timestamp. For metrics for any given 24-hour period, set the time period to 86400 seconds, the number of seconds in a day. Also, remember to set the BucketName and StorageType dimensions.

For example, if you want to use the AWS CLI to get the average of a specific bucket's size in bytes, you could use the following command:

aws cloudwatch get-metric-statistics --metric-name BucketSizeBytes --namespace AWS/S3 --start-time 2016-10-19T00:00:00Z --end-time 2016-10-20T00:00:00Z --statistics Average --unit Bytes --region us-west-2 --dimensions Name=BucketName,Value=amzn-s3-demo-bucket Name=StorageType,Value=StandardStorage --period 86400 --output json

This example produces the following output.

{
    "Datapoints": [
        {
            "Timestamp": "2016-10-19T00:00:00Z", 
            "Average": 1025328.0, 
            "Unit": "Bytes"
        }
    ], 
    "Label": "BucketSizeBytes"
}
To view metrics by using the Amazon CloudWatch console

  1. Open the CloudWatch console at https://eusc-de-east-1.console.amazonaws-eusc.eu/cloudwatch/.

  2. In the left navigation pane, choose Metrics.

  3. Choose the S3 namespace.

  4. (Optional) To view a metric, enter the metric name in the search box.

  5. (Optional) To filter by the StorageType dimension, enter the name of the storage class in the search box.

To view a list of valid metrics stored for your AWS account by using the AWS CLI

  • At a command prompt, use the following command.

    aws cloudwatch list-metrics --namespace "AWS/S3"

For more information about the permissions required to access CloudWatch dashboards, see Amazon CloudWatch dashboard permissions in the Amazon CloudWatch User Guide.