RMAN uses v$session_longops to record it's progress. After each backup set it uses the DBMS package to update "progress" in the V$ view, having first queried out of the view to find some relevant data within . So when the view goes "bad" RMAN does its initial backup set/piece, trys to update v$session_longops and subsequently gets an Ora-03113 (See Ora-03113.ora-code.com) error and dies. Hence, the backup "fails" inasmuch as it did not run to completion. I reality we get less than 10% of our Db backed-up when this problem is in force.
select sofar, context from v$session_longops where sid = (select distinct sid from v$mystat) and opname like 'RMAN:%' order by start_time desc, context desc
Hope this is clear
T?
>I am confused about the connection between v$session_longops and >making a backup. > >Your email asserts that the v$session_longops problem prevents >backups, but I don't see the connection. >
