We are now reporting some of the most well-liked DynamoDB CloudWatch metrics in 1-minute intervals instead of 5-minute intervals to give you better operational insight. DynamoDB CloudWatch metrics let you monitor the performance of your DynamoDB tables. The increased granularity will let you manufacture better decisions approximately operating your DynamoDB tables. Please see the Monitoring DynamoDB with CloudWatch section of our documentation to learn how to access the new CloudWatch metrics for your tables.
Source: amazon.com