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.

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. Go to the Basic Information page.
    1. Log on to the RDS management console, click on the left Instances , and then select a region above.
      Select a region
    2. Find your RDS instance and click its ID. In the left-side navigation pane, click Basic Information.
  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 storage usage 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.