To increase performance, Data Archive can use database links during Restore cycles. The Data Archive engine copies data using Insert as Select SQL statements. However, since the Copy to Destination step during Restore possibly inserts into heavily indexed ERP tables, you need to properly size the UNDO tablespace on the ERP instance.
To set up the restore database links:
Connect to the ERP source instance as the application user.
Create a private database link that points to the staging user on your history instance.
Edit the Restore Destination Repository and enter the name of the database link created in the Database Link to Source attribute.
Connect to the history instance as the history agent user and create a private database link that points to the application user on the ERP instance.
Edit the Restore Source Repository and enter the name of the database link created in step 4 in the Database Link to Production (Restore only) attribute.