Updated on 2023-12-28 GMT+08:00

Rebooting DB Instances or Read Replicas


You may need to reboot a DB instance during maintenance. For example, after you modify some parameters, a reboot is required for the modifications to take effect. You can reboot a primary DB instance or a read replica on the management console.


  • If the DB instance status is Abnormal, the reboot may fail.
  • Rebooting DB instances will cause service interruptions. During the reboot process, the DB instance status is Rebooting.
  • Rebooting DB instances will cause instance unavailability and clear cached memory. To prevent traffic congestion during peak hours, you are advised to reboot DB instances during off-peak hours.
  • After a primary/standby DB instance is rebooted, it takes about one minute to establish the replication relationship. During this period, some operations, such as changing the instance class, cannot be performed.


  1. Log in to the management console.
  2. Click in the upper left corner of the page and choose Databases > Relational Database Service.
  3. On the Instances page, locate the target DB instance, or click and then locate the target read replica. Choose More > Reboot in the Operation column.

    Alternatively, click the target DB instance on the Instances page to go to the Basic Information page. In the upper right corner, click Reboot.

    For primary/standby DB instances, if you reboot the primary DB instance, the standby DB instance is also rebooted automatically.

  4. In the displayed dialog box, click OK.

    • Immediate: RDS reboots the instance immediately.
    • During maintenance window: RDS will reboot the instance during the maintenance window you configured.

  5. Refresh the DB instance list and view the status of the DB instance. If its status is Available, it has rebooted successfully.