DB Parameter Groups

DB Parameter Group is a container for database engine configuration values that are applied to one or more DB Instances. If you do not supply your own DB Parameter Group, then RDS instance creates a default one for you. If you create multiple RDS instances for the same database engine and version, this default DB Parameter Group will be used for all the RDS DB instances for that given database engine. The default DB Parameter Group contains database engine specific defaults and AWS system defaults based on the DB instance class and storage size that you specify at the time of launch. You cannot change the configuration values in the default DB Parameter Group. You have to create a new DB Parameter Group and update the values in that newly created group. You can then associate that newly created group with the DB instance. Hence, it is always best practice to create a DB Parameter Group for each RDS DB instance that you spin up for your production use. This way, changing...