In this Blog, we explain when to switch to a bigger RDS instance or upgrade RDS Instance type in AWS, You need to know what differences therein configuration between my.cnf and RDS DB-Parameter.
|-> Ensure how much DB connection min required by your application
|-> Ensure NO Slow Query running more than 10sec
|-> Ensure is any scripts making more DB connection with query for select / update / alter etc…
|-> Is there any network latency between DB and application?