Reducing Read Pressure with RDS Read/Write Splitting

RDS for MySQL, RDS for PostgreSQL, and RDS for SQL Server 2017 Enterprise Edition DB instances support read replicas to offload read traffic from primary DB instances.

RDS for MySQL primary instances and read replicas have independent connection addresses. A maximum of 10 read replicas can be created for each RDS for MySQL instance. For details about how to create a read replica, see Creating a Read Replica.

To offload read pressure on the primary DB instance, you can create one or more read replicas in the same region as the primary instance. These read replicas can process a large number of read requests and increase application throughput.