Help Center/ Relational Database Service_RDS for MySQL/ FAQs/ Read Replicas and Read/Write Splitting/ Does RDS for MySQL Support Read/Write Splitting?
Updated on 2026-10-08 GMT+08:00
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Does RDS for MySQL Support Read/Write Splitting?

Yes. For details, see Table 1.

Table 1 RDS read/write splitting

Database

Read/Write Splitting

Database Proxy

Usage Instructions

RDS for MySQL

Supported

Supported

Prerequisites: You have obtained the permissions required for read/write splitting. To apply for the permissions, submit a service ticket.

How to enable: Enable the RDS for MySQL database proxy service for read/write splitting.

Feature description

  • If read/write splitting is enabled and there is no read replica, read and write requests are automatically routed through the read/write splitting address to the primary instance.
  • If read/write splitting is enabled and there are read replicas, RDS automatically routes write requests through the read/write splitting address to the primary instance and read requests to each read replica by user-defined weights.

Constraints: See constraints on database proxy.
Parent Topic: Read Replicas and Read/Write Splitting