minCapacityUnits

Specifies the minimum value of the DMS capacity units (DCUs) for which a given DMS Serverless replication can be provisioned. A single DCU is 2GB of RAM, with 1 DCU as the minimum value allowed. The list of valid DCU values includes 1, 2, 4, 8, 16, 32, 64, 128, 192, 256, and 384. So, the minimum DCU value that you can specify for DMS Serverless is 1. If you don't set this value, DMS sets this parameter to the minimum DCU value allowed, 1. If there is no current source activity, DMS scales down your replication until it reaches the value specified in MinCapacityUnits.