Flash Recovery Area must be monitored regularly. Sometimes FRA runs our of space and a DBA must be able to gather FRA space utilization. It is very important to monitor space usage in the fast recovery area to ensure that it is large enough to contain backups and other recovery-related files.
Below script gives you Flash Recovery Area utilization details:
sql">set linesize 500 col NAME for a50 select name, ROUND(SPACE_LIMIT/1024/1024/1024,2) "Allocated Space(GB)", round(SPACE_USED/1024/1024/1024,2) "Used Space(GB)", round(SPACE_RECLAIMABLE/1024/1024/1024,2) "SPACE_RECLAIMABLE (GB)" , (select round(ESTIMATED_FLASHBACK_SIZE/1024/1024/1024,2) from V$FLASHBACK_DATABASE_LOG) "Estimated Space (GB)" from V$RECOVERY_FILE_DEST;