Status: IN
DynamoDB capacity billing includes three hidden overhead mechanisms beyond raw item size: 100 bytes of indexing overhead per item, rounding up to 4 KB for reads and 1 KB for writes, and a minimum 200-byte storage cost per GSI-projected item — collectively making small-item workloads (e.g., IoT telemetry, session tokens) pay dramatically more per byte than large-item workloads.