You can change the specifications of your cluster to meet business requirements. PolarDB supports capacity scaling in three dimensions:

  • Scale up or down the computing capacity: Upgrade or downgrade the specifications of a cluster. [DO NOT TRANSLATE]

  • Scale in or out the computing capacity: Add or delete read-only instances. For more information about the detailed procedures, see Add or delete read-only instances.

  • Scale in or out the storage capacity: The storage capacity is provisioned in a serverless model. As your data increases in size, the storage is automatically expanded.

This topic describes how to upgrade or downgrade the specifications of a PolarDB cluster. It will take only 5-10 minutes for the new specification of each instance to take effect.

Note

  • Specification upgrades or downgrades only apply to clusters. You cannot change the specifications of an instance.

  • The specification upgrades or downgrades will not affect the existing data in the cluster.

  • We recommend that you modify cluster specifications during your service off-peak periods. During a specification upgrade or downgrade, the PolarDB service will be disconnected for a few seconds and some of the functions will be disabled. You will need to reconnect from your applications once PolarDB is disconnected.

  • You can only change cluster specifications when the cluster does not have pending specification changes..

Procedure

  1. Log on to the PolarDB console.
  2. Select a region.
  3. Select Clusters, and find your targeted cluster. Click More in the Actions column of the specific cluster, and then select Upgrade Cluster or Downgrade Cluster.
  4. Select a specification.
    Note All instances in a cluster have the same specifications.
  5. Read and accept the Terms of Service, and click Pay Now.

    Note It will take only 5-10 minutes for the new specification of each instance to take effect.