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doc-exports/docs/opengauss/umn/opengauss_01_0045.html
Wang , Deng Ke 04da47cae2 openGauss UMN 20221109 version 
Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-authored-by: Wang , Deng Ke <wangdengke2@huawei.com>
Co-committed-by: Wang , Deng Ke <wangdengke2@huawei.com>
2022-11-29 07:39:44 +00:00

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Changing Failover Priority

Scenarios

You can change the failover priority of a DB instance on the Basic Information page.

Procedure

  1. Click Service List. Under Database, click GaussDB.
  2. In the navigation pane on the left, choose GaussDB(openGauss) > Instance Management.
  3. Click the target DB instance that you want to change its failover priority. The Basic Information page is displayed.
  4. In the DB Information area, click Change in the Failover Priority field.
  5. In the displayed dialog box, select Reliability or Availability as required.

    • Reliability: Data consistency is given priority during a failover. This is recommended for users with highest priority for data consistency.
    • Availability: Database availability is given priority during a failover. This is recommended for users who require their databases to provide uninterrupted online services.
    • In availability scenarios, contact technical support if you want to change the following database parameters:
      • recovery_time_target: If this parameter is incorrectly changed, the DB instance will undergo forcible failovers frequently.
      • audit_system_object: If this parameter is incorrectly changed, DDL audit logs will be lost.
    • You need to manually reboot the DB instance for the change to take effect.
    • Failover priority cannot be changed when the DB instance is rebooting.

  6. Click OK.
Parent topic: Instance Management