Parameter groups

A parameter group is a named set of MongoDB engine settings. Attach one parameter group to a MongoDB cluster at a time.

Concepts

• Parameter schema group — allowed parameters for an engine and version
• Parameter group — your values for that schema
• MongoDB parameter group — the assignment of a group to a cluster

Default assignment

When you create a cluster, myStack attaches a default parameter group for the engine if one is configured.

To create a parameter group

1. Choose MongoDB, Parameter Groups, then create a group.
2. Enter a name.
3. Choose a parameter schema group (for example, MongoDB 7.0).
4. Set parameter values.
5. Choose Save.

To attach a parameter group to a cluster

1. Open the cluster detail page.
2. In Parameter Group, choose a group (or No parameter group to detach).
3. Choose Save.
4. If attaching a group, choose whether to restart the engine when static parameters change.

Changing parameter values

Editing a parameter value in a parameter group that is already attached does not automatically apply those changes to existing clusters. Copy the group, edit the copy, then attach the copy to apply updates.