"The Archivelog file size" and the question of 'db_recovery_file_dest_size.

Hello

According to the literature, DB_RECOVERY_FILE_DEST specifies the default location for the flash recovery area. The flash recovery area contains copies of files of control current multiplexes and remake online of newspapers, but also archived redo logs

And DB_RECOVERY_FILE_DEST_SIZE specifies (in bytes) of the strict limit on the total space to be used by the target database recovery files created in the flash recovery area.

Here's the info from my database (10 gr 2, RHEL 64-bit database is in archivelog mode):

Log_archive_dest_1 = ' LOCATION = + recovery /'

db_recovery_file_dest = '+ RECOVERY. "

db_recovery_file_dest_size = 550 GB

-Size of archivelog files:

Select

SUM(BLOCKS * BLOCK_SIZE)/1024/1024/1024 SIZE_GB

Of

V$ ARCHIVED_LOG

-> 672,39 GB

If I have question used flash recovery area space, it is to be:

SELECT name

, ceil (space_limit / 1024 / 1024) SIZE_M

, ceil (space_used / 1024 / 1024) USED_M

, decode (nvl (space_used, 0),)

0, 0

ceil ((space_used / space_limit) * 100)) PCT_USED

V $ recovery_file_dest

ORDER BY name

NAME SIZE_M USED_M PCT_USED

+ 563200 8 1 RECOVERY

I'm confused where are the archivelogs saved if not + recovery?

Total current total size of ARCHIVELOG files if "672.39" but especially the request saying that only 8% of the db_recovery_file_dest was used. So obviously they are either not in + RECOVERY or they are not accounted for.

I chedk on ASM using asmcmd:

ASMCMD > cd ARCHIVELOG

ASMCMD > ls

2013_09_05 /.

2013_09_06 /.

2013_09_09 /.

2013_09_10 /.

2013_09_11 /.

2013_09_12 /.

ASMCMD >

Whereas the query on the view V$ ARCHIVED_LOG shows me the file names for the month of August as well.

I don't know that I am misunderstanding/missing something. I'm lost :-(

Please advise!

Thanks in advance!

You wrong understand archiving at the area of fast recovery works. You have done the fast recovery area to a certain destination and also set up check-in to the same physical location: but Oracle doesn't know that they are in the same place. You must explicitly set:

ALTER system set log_archive_dest_1 is 'location = USE_DB_RECOVERY_FILE_DEST';.

and then Oracle will understand and follow the space in the paper archive used against the db_recovery_file_dest_size.

--

John Watson

Oracle Certified Master s/n

Tags: Database

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