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Change configurations

Last Updated: Apr 19, 2018

You can change the RDS instance configurations (including the specifications, type, and storage space) to meet service requirements. We recommend that you change the configuration when the service is not busy because a brief disconnection may occur and certain features become unavailable during this period. RDS now supports scheduled configuration changes. For more information, see the procedure in this document.

This document describes how to change the configuration of RDS instances. For information about billing of configuration changes, see Configuration Change Billing. Different rules may apply when you change the configurations of instances with different billing methods.

  • Subscription instances

    • Within the subscription duration of an instance, you can only upgrade the configuration. The changes take effect immediately. During the renewal of an instance, you can upgrade or downgrade the configuration. The changes take effect at the beginning of the next subscription duration.

    • You can upgrade or downgrade an expired instance during the renewal. The changes take effect at the beginning of the new subscription. For more information about renewals, see Maunally renew the subscription instance.

  • You can upgrade or downgrade Pay-As-You-Go instances at any time.


  • During configuration changes, you cannot perform most database, account, and network management operations. The following table lists the details. Choose a proper time to change the instance configuration.


    • Modify Whitelist
    • Enable SQL Audit
    • Set Maintenance Time Window

    Not supported:

    • Add Read-only Instances
    • Add Instances for Failover
    • Release Instances
    • Switch to Subscription
    • Move Instances across Zones
    • Create User Accounts/Master Accounts
    • Reset Password
    • Change Account Permissions
    • Create and Delete Databases
    • Change Network Type
    • Change Access Mode
    • Change Connection Address
    • Apply for Public Address
    • Switchover between Primay and Slave Instances
    • Change Backup Mode
    • Restore Data
    • Modify Parameters
  • Changing the configuration of an instance does not affect the data on the instance. However, when the system is applying the changes, a brief disconnection may occur (30 seconds). To minimize the impact, change the configuration when the service is not busy or make sure your application supports automatic reconnection.


  1. Log on to the RDS console.

  2. Select the region where the target instance is located.

  3. In the Action column, choose More > Change Configuration.

  4. Select the new specification.

    Parameter nameDescription
    TypeAvailable RAM and CPU specifications.
    CapacityAvailable storage space. Specify the proper storage space for an instance based on the space usage of the database.
    Note: The storage space varies depending on the instance specifications. If the storage space of the current instance cannot meet your requirements, upgrade the instance. For more information, see Instance type list.
    Switch AtThe execution time of the configuration change. Configuration changes may involve underlying data migration tasks. You can choose to change the configuration immediately after data migration. When the system applies the changes, many features become unavailable, such as database mangement, account management, and network type switching. To minimize the impact, you also can apply the changes during the maintenance period.
  5. To modify the maintenance period, follow the following procdedure. Skip to step 7 if you don’t want to modify the maintenance period.

    1. Click Modify to open the Basic Information page.

      Modify maintenance period

    2. In the Configuration Information area, specify the maintenance period, and click Save.

    3. Return to the Change Configuration page.

  6. Click Upgrade Now.

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