This topic describes how to modify parameter values of a cluster in the ApsaraDB for PolarDB console. For more information about the parameters, see Server System Variables.

Important notes

  • You must modify parameter values according to the Value Range column on the Parameters page.
  • For some parameters, you need to restart all nodes after the parameter values are modified. We recommend that you make appropriate service arrangements before you restart the nodes. Proceed with caution. You can determine whether the modification of a parameter value requires a node restart according to the value in the Force Restart column on the Parameters page.


  1. Log on to the ApsaraDB for PolarDB console.
  2. Select a region.
  3. Find the target cluster and click the cluster ID in the Cluster Name column.
  4. In the left-side navigation pane, choose Settings and Management > Parameters.
  5. Modify the values of one or more parameters in the Current Value column, and click Apply Changes.
  6. In the Save Changes dialog box that appears, click OK.

Related API operations

API operation Description
DescribeDBClusterParameters Views cluster parameters.
ModifyDBClusterParameters Modifies the values of cluster parameters.