After you have completed upgrading your OnBase database, Hyland Software recommends that you perform maintenance on your database server. This should include creating a secondary post-upgrade backup of your database (making sure not to overwrite your pre-upgrade backups), and updating the database statistics at 100%. Review the Database Maintenance Guide for additional information.
You should also consider backing up and truncating the database transaction log for OnBase as the upgrade process may have caused the transaction log to grow considerably larger.