Read replicas are read-only copies of the primary MySQL instance of the DB system within the same region. Read replicas provide higher performance and durability for a DB system. They scale out reads, that is, reduce query latency. Any updates that you make to the source DB system is asynchronously copied to the read replicas.

• Overview of Read Replica
• Creating a Read Replica
• Editing a Read Replica
• Monitoring Read Replica Metrics
• Limitations