在我的測試環境中使用rman備份資料庫的時候，報如下錯誤（紅色部分）：

oracle@oracle[/oracle]> rman target /

Recovery Manager: Release 10.2.0.1.0 - Production on Sat Jan 9 09:42:36 2010

Copyright (c) 1982, 2005, Oracle. All rights reserved.

connected to target database: CNHTM (DBID=1230089073)

RMAN> backup database;

Starting backup at 09-JAN-10
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=159 devtype=DISK
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00001 name=+DATA/cnhtm/datafile/system01.dbf
input datafile fno=00003 name=+DATA/cnhtm/datafile/sysaux01.dbf
input datafile fno=00005 name=+DATA/cnhtm/datafile/example01.dbf
input datafile fno=00002 name=+DATA/cnhtm/datafile/undotbs101.dbf
input datafile fno=00004 name=+DATA/cnhtm/datafile/users01.dbf
channel ORA_DISK_1: starting piece 1 at 09-JAN-10
RMAN-03009: failure of backup command on ORA_DISK_1 channel at 01/09/2010 09:43:36
ORA-19809: limit exceeded for recovery files
ORA-19804: cannot reclaim 52428800 bytes disk space from 1073741824 limitcontinuing other job steps, job failed will not be re-run
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
including current control file in backupset
including current SPFILE in backupset
channel ORA_DISK_1: starting piece 1 at 09-JAN-10
channel ORA_DISK_1: finished piece 1 at 09-JAN-10
piece handle=/oracle/flash_recovery_area/CNHTM/backupset/2010_01_09/o1_mf_ncsnf_TAG20100109T094250_5nhqtbys_.bkp tag=TAG20100109T094250 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:04
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================

RMAN-03009: failure of backup command on ORA_DISK_1 channel at 01/09/2010 09:43:36
ORA-19809: limit exceeded for recovery files
ORA-19804: cannot reclaim 52428800 bytes disk space from 1073741824 limit
RMAN> exit

Recovery Manager complete.

這是flash_recovery_area空間不足的提示

[@more@]

用如下方法檢查flash_recovery_area使用情況

oracle@oracle[/oracle]> sqlplus / as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on Sat Jan 9 09:44:30 2010

Copyright (c) 1982, 2005, Oracle. All rights reserved.

Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options

sys@CNHTM> select * from V$FLASH_RECOVERY_AREA_USAGE;

FILE_TYPE PERCENT_SPACE_USED PERCENT_SPACE_RECLAIMABLE NUMBER_OF_FILES
------------ ------------------ ------------------------- ---------------
CONTROLFILE 0 0 0
ONLINELOG 0 0 0
ARCHIVELOG 0 0 5
BACKUPPIECE 63.01 .7 7
IMAGECOPY 0 0 0
FLASHBACKLOG 0 0 0

6 rows selected.

檢查db_recovery_file_dest_size引數

sys@CNHTM> show parameter recovery

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_recovery_file_dest string /oracle/flash_recovery_area
db_recovery_file_dest_size big integer 1G
recovery_parallelism integer 0

將引數db_recovery_file_dest_size增大為20G

sys@CNHTM> alter system set db_recovery_file_dest_size=20G scope=both;

System altered.

sys@CNHTM> exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options

再次備份，沒有問題了

oracle@oracle[/oracle]> rman target /

Recovery Manager: Release 10.2.0.1.0 - Production on Sat Jan 9 09:45:43 2010

Copyright (c) 1982, 2005, Oracle. All rights reserved.

connected to target database: CNHTM (DBID=1230089073)

RMAN> backup database;

Starting backup at 09-JAN-10
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=154 devtype=DISK
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00001 name=+DATA/cnhtm/datafile/system01.dbf
input datafile fno=00003 name=+DATA/cnhtm/datafile/sysaux01.dbf
input datafile fno=00005 name=+DATA/cnhtm/datafile/example01.dbf
input datafile fno=00002 name=+DATA/cnhtm/datafile/undotbs101.dbf
input datafile fno=00004 name=+DATA/cnhtm/datafile/users01.dbf
channel ORA_DISK_1: starting piece 1 at 09-JAN-10
channel ORA_DISK_1: finished piece 1 at 09-JAN-10
piece handle=/oracle/flash_recovery_area/CNHTM/backupset/2010_01_09/o1_mf_nnndf_TAG20100109T094622_5nhqzhs0_.bkp tag=TAG20100109T094622 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:01:05
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
including current control file in backupset
including current SPFILE in backupset
channel ORA_DISK_1: starting piece 1 at 09-JAN-10
channel ORA_DISK_1: finished piece 1 at 09-JAN-10
piece handle=/oracle/flash_recovery_area/CNHTM/backupset/2010_01_09/o1_mf_ncsnf_TAG20100109T094622_5nhr1m8l_.bkp tag=TAG20100109T094622 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:03
Finished backup at 09-JAN-10

RMAN>

--end--

rman 備份中ORA-19809、ORA-19804問題解決

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