MySQL Database Service users can now easily deploy and maintain up to 18 read replicas to scale out/in read-intensive workloads. The applications can connect to a read-only endpoint that balances the queries between all read replicas in the DB system. As a result, you can achieve read scalability without worrying about managing additional infrastructure to balance the read queries. To create read replicas using the console, go to the DB System Details page, and click Read Replicas under the Resources list.

For more information, see Read Replicas and Load Balancer