Read Performance Considerations
With the launch of
Amazon DynamoDB Accelerator (DAX)
Because reads can be served from the DAX layer for queries with a cache hit, and the table will only serve the reads when there is a cache miss, the provisioned read capacity units can be lowered for cost savings.
Tip: Based on the size of your tables and data access pattern, consider provisioning a single DAX cluster for multiple smaller tables or multiple DAX clusters for a single bigger table or a hybrid caching strategy that will work best for your application.