Rebooting a DB instance in Amazon Neptune - Amazon Neptune
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Rebooting a DB instance in Amazon Neptune

In some cases, if you modify an Amazon Neptune DB instance, change the DB parameter group that is associated with the instance, or change a static DB parameter in a parameter group that the instance uses, you must reboot the instance to apply the changes.

Rebooting a DB instance restarts the database engine service. A reboot also applies to the DB instance any changes to the associated DB parameter group that were pending. Rebooting a DB instance results in a momentary outage of the instance, during which the DB instance status is set to rebooting. If the Neptune instance is configured for Multi-AZ, the reboot might be conducted through a failover. A Neptune event is created when the reboot is completed.

If your DB instance is a Multi-AZ deployment, you can force a failover from one Availability Zone to another when you choose the Reboot option. When you force a failover of your DB instance, Neptune automatically switches to a standby replica in another Availability Zone. It then updates the DNS record for the DB instance to point to the standby DB instance. As a result, you must clean up and re-establish any existing connections to your DB instance.

Reboot with failover is beneficial when you want to simulate a failure of a DB instance for testing or restore operations to the original Availability Zone after a failover occurs. For more information, see High Availability (Multi-AZ) in the Amazon RDS User Guide. When you reboot a DB cluster, it fails over to the standby replica. Rebooting a Neptune replica does not initiate a failover.

The time required to reboot is a function of the crash recovery process. To improve the reboot time, we recommend that you reduce database activities as much as possible during the reboot process to reduce rollback activity for in-transit transactions.

On the console, the Reboot option might be disabled if the DB instance is not in the Available state. This can be due to several reasons, such as an in-progress backup, a customer-requested modification, or a maintenance window action.


Before Release: (2022-07-21), all the read-replicas in a DB cluster were automatically rebooted whenever the primary (writer) instance restarted.

Starting with Release: (2022-07-21), restarting the primary instance does not cause any of the replicas to restart. This means that if you are changing a cluster parameter, you must restart each instance separately to pick up the parameter change (see Parameter groups).

To reboot a DB instance using the Neptune console
  1. Sign in to the Amazon Management Console, and open the Amazon Neptune console at

  2. In the navigation pane, choose Databases.

  3. Choose the DB instance that you want to reboot.

  4. Choose Instance actions, and then choose Reboot.

  5. To force a failover from one Availability Zone to another, select Reboot with failover? in the Reboot DB Instance dialog box.

  6. Choose Reboot. To cancel the reboot, choose Cancel instead.