Question

A developer maintains a product catalog service backed by DynamoDB with provisioned capacity. Read traffic has grown, and the table is now consuming most of its provisioned read capacity units (RCUs), driving up cost. Analysis shows the application always calls GetItem with ConsistentRead set to true, but the catalog data changes only a few times per day and stale reads of a second or two are acceptable. What change will most cost-effectively reduce read capacity consumption?

Accepted Answer

Switch the reads to eventually consistent reads by removing ConsistentRead=true, so each read consumes half an RCU per 4 KB.

Answer

Enable DynamoDB Streams on the table to offload read traffic to a downstream consumer.

Answer

Add a global secondary index that duplicates the primary key so reads can be spread across two indexes.

Answer

Increase the provisioned RCUs and enable auto scaling to keep up with the higher read volume.