Deleting the flashback recovery area and the files (Oracle 10g on Solaris 8
Hi,
We have a dev. db which is small about 3 gb in all (crd files). for this I had enabled flashback and also put it in archivelog mode. then the db_recovery_file_dest_size grew to 3 gb. since space is an issue, I turned off the flashback feature. (by the command: ALTER DATABASE FLASHBACK OFF;)
Tomorrow I will also make it into noarchivelog mode. My question is: it is having lots of archived logs (may be 3 gb or more) in the flashback recovey area. What is the correct syntax to delete them? There is a warning in alert log which says that use RMAN delete command but I am not aware of exact syntax.
Thanks
Nirav
You can use variations of delete. (As you say there are many files, incude noprompt)
Once the database goes into noarchivelog mode, the archived redo logs are essentially worthless. They would be useful/necessary if you wanted to restore the database to a point in time prior to going noarchive, but if you don't need that, the two ways you are looking at deleting (depending how you go about it) are at the OS level and within the database (what Oracle knows or remembers about the archived redo logs and where they were sent to via the arch process). The RMAN approach is cleaner, assuming you were using that.
http://download.oracle.com/docs/cd/B19306_01/backup.102/b14192/maint009.htm#sthref776
Delete unnecessary files from the flash recovery area using the RMAN DELETE command. (Note that if you use host operating system commands to delete files, then the database will not be aware of the resulting free space. You can run the RMAN CROSSCHECK command to have RMAN re-check the contents of the flash recovery area and identify expired files, and then use the DELETE EXPIRED command to remove missing files from the RMAN repository.)
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Thanks4joey1 wrote:
Hallo! I have just installed Oracle 10g in Solaris 10.When I logged into sqlplus / as sysdba if found that I was connected to an idle instance. When I tried to startup open the db, the following error appeared
Connected to an idle instance.
SQL> startup open;
ORA-01078: failure in processing system parameters
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My pfile has the name init.ora and not initsolaris.ora.How can I change the settings to make the Oracle database start via pfile init.ora.
By default, oracle will look first for a spfile named "spfile<ORACLE_SID>.ora". Lacking that, it will try to find "init<ORACLE_SID>).ora.
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Flashback Recovery area Full in Oracle 10g
Before the flashback recovery area is full our
Archive destination is USE_DB_RECOVERY_FILE_DEST
Our DB_RECOVERY_FILE_DEST =/S01/app/oracle/flash_recovery_area/
We got the Error:- ORA-00257
Inorder to resolve the error we changed the log_archive_dest_1='/S01/app/oracle/db/archive'
now the archive destination is changed to /S01/app/oracle/db/archive
Archive logs getting generated in the above directory from now onwards.
In the mean time i moved all the files from /S01/app/oracle/flash_recovery_area/
to diff directory.
But the below query gives still the space used is 3935.27 MB, where physically there are no files in /S01/app/oracle/flash_recovery_area/
When will these values in the query update. Is there anything i have to do to reclaim the space 3935.27 MB (in the query below). Now after reclaiming the space, i want to use the Flash Back Recovery area (/S01/app/oracle/flash_recovery_area/) for the archive logs, like a switchback to where we are initially. How to reclaim the space ? How to switch back archive logs to Flash Back Recovery Area (/S01/app/oracle/flash_recovery_area/).
Please the below report for the above conversation.
Sat May 20 page 1
Flash Recovery Area Status
Space Space Reclm
Limit Used Space
File Name (MB) (MB) (MB) Files
/S01/app/oracle/flash_recovery_a 4000.00 3935.27 3935.27 90
rea
Experts share your experience. Appreciate your reply in this regard..........
ThanksIn UNIX style environments you often don't see reclaimed space until the database is restarted. Backup the database and archivelogs and the flashback area shoudl take care of itself in future. If not, you can always delete obsolete archivelogs manually by using the DELETE command in RMAN.
To cleanup now, first you must tell RMAN that the files you've moved are no longer available:
crosscheck archivelog all;
You can then delete the obsolete archivelogs using the following RMAN command:
delete obsolete;
I'm assuming you use RMAN for all your backups :)
Cheers
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I am using the flash recovery area for all my backup files (archive logs, data and control files). I want to use the redundancy retention policy because it is easy to calculate the space requirement. However, I am not clear how the retention policy applies to archive logs.
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Thanks.I am using the flash recovery area for all my backup
files (archive logs, data and control files). I want
to use the redundancy retention policy because it is
easy to calculate the space requirement. However, I
am not clear how the retention policy applies to
archive logs.
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2> ;
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2> ;
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2> ;
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First, RMAN decides which datafile and control file backups are obsolete. Then, RMAN considers as obsolete all archived
log backups that are older than the oldest datafile or control file backup that must be retained."
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consider it here that i am getting archived before any taking backup i.e backup database in order to make
archive older then the oldest datafile.
SQL> show parameter control_file_record_keep_time
NAME TYPE VALUE
control_file_record_keep_time integer 7
SQL> create table a1 as select * from all_objects
2 /
Table created.
SQL> create table a2 as select * from all_objects
2 /
Table created.
C:\>dir C:\oracle\product\10.1.0\flash_recovery_area\ORCL\ARCHIVELOG\2008_03_17
Volume in drive C is khurram
Volume Serial Number is F49D-FF2B
Directory of C:\oracle\product\10.1.0\flash_recovery_area\ORCL\ARCHIVELOG\2008_03_17
03/17/2008 03:44 PM <DIR> .
03/17/2008 03:44 PM <DIR> ..
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2 Dir(s) 62,714,875,904 bytes free
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2> ;
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using channel ORA_DISK_1
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2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
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RMAN> backup database
2> ;
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using channel ORA_DISK_1
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
Report of obsolete backups and copies
Type Key Completion Time Filename/Handle
Archive Log 402 17-MAR-08 C:\ORACLE\PRODUCT\10.1.0\FLASH_RE
COVERY_AREA\ORCL\ARCHIVELOG\2008_03_17\O1_MF_1_15_3XWLVK6T_.ARCYou can see the obsolete archived files which is the older then the oldest file which has been obsolete.It also
does'nt make sense to keep the archived log files which is older then the oldest file cause it will no longer
be useful for recovery process.
now back to pavillion
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2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
using channel ORA_DISK_1
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Type Key Completion Time Filename/Handle
Archive Log 402 17-MAR-08 C:\ORACLE\PRODUCT\10.1.0\FLASH_RE
COVERY_AREA\ORCL\ARCHIVELOG\2008_03_17\O1_MF_1_15_3XWLVK6T_.ARC
Do you really want to delete the above objects (enter YES or NO)? yes
deleted archive log
archive log filename=C:\ORACLE\PRODUCT\10.1.0\FLASH_RECOVERY_AREA\ORCL\ARCHIVELO
G\2008_03_17\O1_MF_1_15_3XWLVK6T_.ARC recid=402 stamp=649611842
Deleted 1 objects
RMAN> delete backup
2> ;
using channel ORA_DISK_1
RMAN> list backup
2> ;
C:\>dir C:\oracle\product\10.1.0\flash_recovery_area\ORCL\ARCHIVELOG\2008_03_17
Volume in drive C is khurram
Volume Serial Number is F49D-FF2B
Directory of C:\oracle\product\10.1.0\flash_recovery_area\ORCL\ARCHIVELOG\2008_
03_17
03/17/2008 03:59 PM <DIR> .
03/17/2008 03:59 PM <DIR> ..
0 File(s) 0 bytes
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then the oldest datafile backup.
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2> ;
Starting backup at 17-MAR-08
using channel ORA_DISK_1
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
no obsolete backups foundnow i come to at SQL and make redo log file filled by creating 2 big tables in order to get it archived
SQL> create table a3 as select * from all_objects
2 /
Table created.
SQL> create table a4 as select * from all_objects
2 /
Table created.
C:\>dir C:\oracle\product\10.1.0\flash_recovery_area\ORCL\ARCHIVELOG\2008_03_17
Volume in drive C is khurram
Volume Serial Number is F49D-FF2B
Directory of C:\oracle\product\10.1.0\flash_recovery_area\ORCL\ARCHIVELOG\2008_
03_17
03/17/2008 04:09 PM <DIR> .
03/17/2008 04:09 PM <DIR> ..
03/17/2008 04:09 PM 9,751,552 O1_MF_1_16_3XWNCGRS_.ARC
1 File(s) 9,751,552 bytes
2 Dir(s) 62,563,205,120 bytes free
RMAN> backup database
2> ;
Starting backup at 17-MAR-08
using channel ORA_DISK_1
channel ORA_DISK_1: starting compressed full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
no obsolete backups foundYou can see no archived logs get obsolete yet cause the archivelog O1_MF_1_16_3XWNCGRS_.ARC
is not older then oldest datafile backup.
But this archivelog file will get obsolete if its beyond the retention policy,lest see how ,just take one more
backup ,as i have already taken two time backup and the moment i go to take third backup it will cross ours
retetnion policy from the period of 2.
RMAN> backup database
2> ;
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
Report of obsolete backups and copies
Type Key Completion Time Filename/Handle
Backup Set 240 17-MAR-08
Backup Piece 231 17-MAR-08 C:\ORACLE\PRODUCT\10.1.0\FLASH_RE
COVERY_AREA\ORCL\BACKUPSET\2008_03_17\O1_MF_NNNDF_TAG20080317T160604_3XWN4WTB_.B
KP
Backup Set 241 17-MAR-08
Backup Piece 232 17-MAR-08 C:\ORACLE\PRODUCT\10.1.0\FLASH_RE
COVERY_AREA\ORCL\BACKUPSET\2008_03_17\O1_MF_NCSNF_TAG20080317T160604_3XWN6Z95_.B
KP
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