> For the complete documentation index, see [llms.txt](https://dev7days.gitbook.io/dev7days/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev7days.gitbook.io/dev7days/aws/rds-and-aurora-db/rds/read-replica.md). # Read Replica RDS read replicas is the most technique that be used to improve read performance. If we create read replica within same region , the charge is free. To Know: * we can replicate the DB across `AZ` and `Region` or within `AZ`. * the read data from replica is eventual consistency. * Applications must update the connection string to leverage read replica #### Usecase * You want to run a reporting application to run some analytics and product application taking on normal load on DB.