For RCU:
for an item up to 4 KB in size
It’s not for “an item”, it’s for a read request of item(s) up to 4KB in size. For a collection of 400B items, a query for 10 items consumes 1 RCU.
The AWS docs are less than clear about this, but a query is a single read.
For reads, DynamoDB charges one read request unit for each strongly consistent read (up to 4 KB)
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For RCU:
It’s not for “an item”, it’s for a read request of item(s) up to 4KB in size. For a collection of 400B items, a query for 10 items consumes 1 RCU.
The AWS docs are less than clear about this, but a query is a single read.