If you have not already done so, in the Change Center of the Administration Console, click Lock & Edit (see Use the Change Center).
In the left pane of
the Administration Console, select
Deployments.
In the right pane,
select the application or module you want to configure.
Select Configuration.
Select Persistence.
Select the persistence unit you want to configure from the
table.
To activate these changes, in the Change Center of the Administration Console, click Activate Changes. Not all changes take effect immediately—some require a restart (see Use the Change Center).