Deleting "Applied" archive logs of primary
I have a data guard environment with a 2 node RAC primary database having a single instance standby database. I am taking incremental backup copy of standby database.
My question is that how can i configure the environment to delete archived redo logs on the primary database only if they have been applied on the standby by. On the RMAN of primary i set up "CONFIGURE ARCHIVELOG DELETION POLICY TO APPLIED ON STANDBY", but it only works if i also configure my standby destination as "MANDATORY" which i don't want.
1. Is there any other automatic way of deleting archives of primary only if they are applied on the standby?