Fast Recovery Area space utilization

Question

Hello!
I had an issue with my FRA getting filled consistently lately and it would give me all sorts of issues. I checked the alert.log and found this:
ORA-19815: WARNING: db_recovery_file_dest_size of 6815744000 bytes is 100.00% used, and has 0 remaining bytes available.
You have following choices to free up space from recovery area:
1. Consider changing RMAN RETENTION POLICY. If you are using Data Guard,
then consider changing RMAN ARCHIVELOG DELETION POLICY.
2. Back up files to tertiary device such as tape using RMAN
BACKUP RECOVERY AREA command.
3. Add disk space and increase db_recovery_file_dest_size parameter to
reflect the new space.
4. Delete unnecessary files using RMAN DELETE command. If an operating
system command was used to delete files, then use RMAN CROSSCHECK and
DELETE EXPIRED commands.
1) I checked the retention policy in RMAN it was : CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default
2) I dont have tape backup option
3) I kept increasing the db_recovery_file_dest_size and it just keep growing
SQL> show parameter db_recovery_file_dest_size
NAME                    TYPE     VALUE
db_recovery_file_dest_size     big integer 10G
4) I did fix it by manually deleting files through the OS ( yea I know rookie mistake) , crosschecking, then delete expired archivelog all;
SQL> SELECT Sum(percent_space_used)-Sum(percent_space_reclaimable) "PCT_SPACE_USED_NOT_FREEABLE" FROM v$flash_recovery_area_usage;
PCT_SPACE_USED_NOT_FREEABLE
          9.18
I dont know what to do to avoid this in the future, I changed my retention policy to a window of 7 days but I have no idea if that will help. I dont want to keep taking manual action , I want the files to get deleted automatically.
Help me out please! Any ideas?
RMAN> show all;
RMAN configuration parameters for database with db_unique_name DB11G are:
CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 7 DAYS;
CONFIGURE BACKUP OPTIMIZATION ON;
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F'; # default
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE COMPRESSION ALGORITHM 'BASIC' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE ; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO BACKED UP 1 TIMES TO DISK;
CONFIGURE SNAPSHOT CONTROLFILE NAME TO '/u01/app/oracle/product/11.2.0/db_1/dbs/snapcf_DB11G.f'; # default

Answer 1

SQL> select * from v$flash_recovery_area_usage order by 1;
FILE_TYPE     PERCENT_SPACE_USED PERCENT_SPACE_RECLAIMABLE
NUMBER_OF_FILES
ARCHIVED LOG               4.59                0
     22
BACKUP PIECE               0                0
     0
CONTROL FILE               0                0
     0
FILE_TYPE     PERCENT_SPACE_USED PERCENT_SPACE_RECLAIMABLE
NUMBER_OF_FILES
FLASHBACK LOG               0                0
     0
FOREIGN ARCHIVED LOG          0                0
     0
IMAGE COPY               0                0
     0
FILE_TYPE     PERCENT_SPACE_USED PERCENT_SPACE_RECLAIMABLE
NUMBER_OF_FILES
REDO LOG               0                0
     0