AWS RDS Postgresql 12.10
max_worker_processes Set this to the number of CPUs you want to share for PostgreSQL exclusively. This is the number of background processes the database engine can use. Setting this parameter will require a server restart. The default is 8.
The default is also
8 in AWS RDS Postgresql, no matter the Instance type (and thus number of vCPUs). Am I cheating myself by paying for a db.r5.12xlarge (48 CPUs) while using the default