This topic describes how to configure automatic storage expansion for an ApsaraDB RDS for MySQL instance after the instance is created.

Prerequisites

  • Your RDS instance runs the RDS High-availability Edition with standard or enhanced SSDs.
  • Your Alibaba Cloud account has a sufficient balance for storage expansion.

Background information

You can use one of the following methods to configure automatic storage expansion:

  • Configure automatic storage expansion when you create your RDS instance. For more information, see Create an ApsaraDB RDS for MySQL instance.
  • Configure automatic storage expansion after your RDS instance is created.

If 15% of the purchased storage capacity is greater than 5 GB, ApsaraDB RDS increases the storage capacity of the instance by 15% of the purchased storage capacity. If 15% of the purchased storage capacity is less than 5 GB, ApsaraDB RDS increases the storage capacity of the instance by 5 GB.

Procedure

  1. Visit the RDS instance list, select a region above, and click the target instance ID.
  2. In the Usage Statistics section of the page that appears, click Settings to the right of Automatic Storage Expansion.
    Automatic Storage Expansion - Settings
  3. Configure the following parameters.
    Configure Storage Size dialog box
    Parameter Description
    Automatic Storage Expansion The switch that is used to control automatic storage expansion.
    Trigger Threshold The threshold based on which ApsaraDB RDS triggers an automatic storage expansion activity. The threshold is a percentage. If the remaining storage space reaches the threshold, ApsaraDB RDS increases the storage capacity of the instance.
    Maximum Storage The maximum storage capacity that is allowed by automatic storage expansion. Valid values: 30 to 32000. Unit: GB. The value of this parameter must be greater than or equal to the purchased storage capacity of the instance.
  4. Click Confirm.

Related operations

Operation Description
ModifyDasInstanceConfig Configures automatic storage expansion for an ApsaraDB RDS instance.