Amazon CloudWatch
User Guide

Amazon Simple Storage Service Dimensions and Metrics

Amazon Simple Storage Service sends data points to CloudWatch for several metrics, such as object counts and bytes stored, once a day. For more information, see Monitoring Amazon S3 with CloudWatch in the Amazon Simple Storage Service Developer Guide.

Amazon S3 CloudWatch Metrics

The AWS/S3 namespace includes the following metrics.


The amount of data in bytes stored in a bucket in the Standard storage class, Standard - Infrequent Access (Standard_IA) storage class, or the Reduced Redundancy Storage (RRS) class.

Valid storage type filters: StandardStorage, or StandardIAStorage, or ReducedRedundancyStorage (see StorageType dimension)


The total number of objects stored in a bucket for all storage classes except for the GLACIER storage class.

Valid storage type filters: AllStorageTypes only (see StorageType dimension)

Amazon S3 CloudWatch Dimensions

The following dimensions are used to filter Amazon S3 metrics.




This dimension filters the data you request for the identified bucket only.


This dimension filters the data you have stored in a bucket by the type of storage. The types are StandardStorage for the Standard storage class, StandardIAStorage for the Standard_IA storage class, ReducedRedundancyStorage for the Reduced Redundancy Storage (RRS) class, and AllStorageTypes. The AllStorageTypes type includes the Standard, Standard_IA, and RRS storage classes, it does not include the GLACIER storage class.