Amazon DynamoDB has two read/write capacity modes for processing reads and writes on your tables:

On-demand

Provisioned (default, free-tier eligible)

The read/write capacity mode controls how you are charged for read and write throughput and how you manage capacity. You can set the read/write capacity mode when creating a table or you can change it later.

Secondary indexes inherit the read/write capacity mode from the base table. For more information, see Considerations when changing read/write Capacity Mode.