port
The port number on which the DB instances in the DB cluster accept connections. Default:
When
`EngineMode`is`provisioned`,`3306`(for both Aurora MySQL and Aurora PostgreSQL)When
`EngineMode`is`serverless`:`3306`when`Engine`is`aurora`or`aurora-mysql``5432`when`Engine`is`aurora-postgresql`The`No interruption`on update behavior only applies to DB clusters. If you are updating a DB instance, see Port for the AWS::RDS::DBInstance resource. Valid for: Aurora DB clusters and Multi-AZ DB clusters