Many operations take time in the Database like full table scan, backup, full index scan, and joins. We can estimate the % completion or monitor the session using the v$session_longops view in Oracle. This is a very useful view and provides quite an accurate estimate.
How to find the %completion for the long operation for a session
select OPNAME,SOFAR/TOTALWORK*100 ,to_char(start_time,'dd-mon-yy hh:mi')
started ,elapsed_seconds/60/60 from v$session_longops where sid=&1;
How to find all the longops in the Oracle Database
select sid, SOFAR, to_char(LAST_UPDATE_TIME,'DD-MON-RRRR:HH24:MI:SS') , to_char(start_time,'DD-MON-RRRR:HH24:MI:SS'),TIME_REMAINING from V$SESSION_LONGOPS where time_remaining > 0 and TOTALWORK != 0
In the case of Oracle RAC, we need to use gv$ view
select inst_id,sid, SOFAR, to_char(LAST_UPDATE_TIME,'DD-MON-RRRR:HH24:MI:SS') , to_char(start_time,'DD-MON-RRRR:HH24:MI:SS'),TIME_REMAINING from gV$SESSION_LONGOPS where time_remaining > 0 and TOTALWORK != 0
How to find the % Backup completion from Longops
SELECT inst_id,SID, SERIAL#, CONTEXT, SOFAR, TOTALWORK,
ROUND(SOFAR/TOTALWORK*100,2) "%_COMPLETE",START_TIME,LAST_UPDATE_TIME
FROM GV$SESSION_LONGOPS
WHERE OPNAME LIKE '%RMAN%'
---AND OPNAME NOT LIKE '%aggregate%'
AND TOTALWORK != 0
Hope you like these queries
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