The article specifies that the instance classes are `m6g`, in the variants `large` all the way up to `16xlarge`. According to the AWS documentation (here¹ and h

The article specifies that the instance classes are `m6g`, in the variants `large` all the way up to `16xlarge`. According to the AWS documentation (here¹ and here²), they are Graviton2. AWS is opaque about the underlying hardware underlying an RDS instance; there may be no way to find out exactly which are the CPU models (although I'm not 100% sure). The writer may have cleared the waters upfront about this, but this is a limit of AWS. ¹: https://docs.amazonaws.cn/en_us/AmazonRDS/latest/UserGuide/Concepts.DBInstanceClass.html https://docs.amazonaws.cn/en_us/AmazonRDS/latest/UserGuide/C... ²: https://aws.amazon.com/ec2/instance-types/m6g https://aws.amazon.com/ec2/instance-types/m6g