Amazon Neptune
User Guide (API Version 2017-11-29)

Amazon Neptune DB Parameter Groups

You manage your database configuration in Amazon Neptune by using parameters in a DB parameter group. DB parameter groups act as a container for engine configuration values that are applied to one or more DB instances.

There are two types of DB parameter groups: DB cluster parameter groups and DB parameter groups.

  • DB cluster parameter groups apply to every instance in the cluster and generally have broader settings.

  • DB parameter groups apply at the instance level and generally are associated with the Neptune graph engine, such as the neptune_query_timeout parameter.

A default DB parameter group is used if you create a DB instance without specifying a custom DB parameter group. You can't modify the parameter settings of a default DB parameter group. You must create your own DB parameter group to change parameter settings from their default value. Not all DB engine parameters can be changed in a custom DB parameter group.

Here are some important points you should know about working with parameters in a DB parameter group:

  • When you change a static parameter and save the instance DB parameter group, the parameter change takes effect after you manually reboot the DB instance.

  • When you change a static parameter and save the DB cluster parameter group, the parameter change takes effect after you manually reboot every DB instance in the cluster.

  • Improperly setting parameters in a DB parameter group can have unintended adverse effects, including degraded performance and system instability. Always exercise caution when modifying database parameters, and back up your data before modifying a DB parameter group. Try out your parameter group setting changes on a test DB instance before applying those changes to a production DB instance.

Editing a DB Parameter Group

  1. Sign in to the AWS Management Console, and open the Amazon Neptune console at https://console.aws.amazon.com/neptune/home.

  2. Choose Parameter groups in the navigation pane.

  3. Choose the Name link for the DB parameter group that you want to edit.

    (Optional) Choose Create parameter group to create a new cluster parameter group and create the new group. Then choose the Name of the new parameter group.

    Important

    This is required if you only have the default DB cluster parameter group because the default DB cluster parameter group can't be modified.

  4. Choose Edit parameters.

  5. Set the value for the parameters that you want to change.

  6. Choose Save changes.

  7. Reboot every Neptune DB instance in the Neptune cluster.

Creating a DB Parameter Group

  1. Sign in to the AWS Management Console, and open the Amazon Neptune console at https://console.aws.amazon.com/neptune/home.

  2. Choose Parameter groups in the left navigation pane.

  3. Choose Create DB parameter group.

    The Create DB parameter group page appears.

  4. In the Type list, choose DB Parameter Group or DB Cluster Parameter Group.

  5. In the Group name box, type the name of the new DB parameter group.

  6. In the Description box, type a description for the new DB parameter group.

  7. Choose Create.