An PolarDB cluster endpoint is used as a unified portal to access all nodes in the cluster. It provides capabilities such as high availability, read/write splitting, and automatic load balancing. This topic describes how to modify the consistency level for the endpoint of a PolarDB for PostgreSQL cluster.


  1. Log on to the PolarDB console.
  2. On the top of the page, select the region where the target cluster is located.
  3. Find the target cluster and click the cluster ID to go to the Overview page.
  4. On the Overview page, click Modify in the Connection Information section.
  5. On the Configure Nodes page, specify the following parameters.
    Parameter Description
    Load Balancing Policy The policy for distributing read requests among multiple read-only nodes when read/write splitting is enabled. This parameter is set to Load-based Automatic Scheduling and cannot be changed.
    Consistency Level
    • Eventual Consistency: provides the best performance.
    • Session Consistency (Recommended): ensures the read consistency at the session level. In this mode, the load on the primary node is slightly increased.
    Note After you change the consistency level, the new consistency level is immediately applied to all connections.
  6. Click OK.

Related API operations

API Description
DescribeDBClusterEndpoints Queries the endpoints of an PolarDB cluster.
ModifyDBClusterEndpoint Modifies an endpoint of an PolarDB cluster.