Spacewalk documentation: https://fedorahosted.org/spacewalk/wiki/DatabaseMigrations
These are now live and on the portal: https://access.redhat.com/documentation/en-US/Red_Hat_Satellite/5.7/html/Installation_Guide/sect-Migrating_from_an_Embedded_Database_to_an_External_PostgreSQL_Database.html https://access.redhat.com/documentation/en-US/Red_Hat_Satellite/5.7/html/Installation_Guide/sect-Migrating_from_an_Embedded_Database_to_an_External_Oracle_Database.html https://access.redhat.com/documentation/en-US/Red_Hat_Satellite/5.7/html/Installation_Guide/sect-Migrating_from_an_External_PostgreSQL_Database_to_an_Embedded_Database.html https://access.redhat.com/documentation/en-US/Red_Hat_Satellite/5.7/html/Installation_Guide/sect-Migrating_from_an_External_Oracle_Database_to_an_Embedded_Database.html