Amazon RDS is a managed database service that supports MySQL. The DBA can reduce
operational overhead by moving to RDS and having less work to do to manage the
database
AWS Lambda provides functions as a service. It therefore a compute service, not a
database service and cannot be used to run a MySQL database
AWS CloudFormation is used for automating the deployment of infrastructure on AWS, not
for automating operations
Migrating onto an EC2 instance will not reduce operational overhead as the DBA will
still need to manage both the operating system and the database