Amazon Redshift now allows you to get started with Amazon Redshift Serverless with a lower data warehouse base capacity configuration of 8 Redshift Processing Units (RPU). Amazon Redshift Serverless measures data warehouse capacity in RPU and you pay only for the duration of workloads you run in RPU-hours on a per-second basis. Previously the minimum base capacity required to run serverless was 32 RPU. With the new lowered base capacity minimum of 8 RPU, you now have even more flexibility to support diverse set of workloads of small to large complexity based on your price performance requirements.
Source:: Amazon AWS