因发现 flash area 不多了，通过 select * from v$flash_recovery_area_usage ； 发现是备份集占用空间太多。
于是delete obsolete; 发现出现报错 ORA-19606: Cannot copy or restore to snapshot control file
RMAN> delete obsolete;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 1
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=174 device type=DISK
Deleting the following obsolete backups and copies:
Type Key Completion Time Filename/Handle
-------------------- ------ ------------------ --------------------
Control File Copy 1 23-AUG-13 /u01/app/Oracle/product/11.2.0/dbhome_1/dbs/snapcf_finaprim.f
Backup Set 560 20-SEP-13
Backup Piece 560 20-SEP-13 +DATADG/finaprim/backupset/2013_09_20/annnf0_tag20130920t233259_0.1829.826673579
Backup Set 561 20-SEP-13
Backup Piece 561 20-SEP-13 +DATADG/finaprim/autobackup/2013_09_20/s_826673580.945.826673581
Backup Set 562 21-SEP-13
Backup Piece 562 21-SEP-13 +DATADG/finaprim/backupset/2013_09_21/annnf0_tag20130921t233004_0.623.826759805
Backup Set 563 21-SEP-13
Backup Piece 563 21-SEP-13 +DATADG/finaprim/backupset/2013_09_21/nnndf0_tag20130921t233011_0.693.826759813
Backup Set 564 21-SEP-13
Backup Piece 564 21-SEP-13 +DATADG/finaprim/backupset/2013_09_21/annnf0_tag20130921t233257_0.807.826759977
Backup Set 565 21-SEP-13
Backup Piece 565 21-SEP-13 +DATADG/finaprim/autobackup/2013_09_21/s_826759979.743.826759979
Backup Set 566 22-SEP-13
Backup Piece 566 22-SEP-13 +DATADG/finaprim/backupset/2013_09_22/annnf0_tag20130922t233005_0.1800.826846207
Backup Set 567 22-SEP-13
Backup Piece 567 22-SEP-13 +DATADG/finaprim/backupset/2013_09_22/nnndf0_tag20130922t233021_0.624.826846223
Backup Set 568 22-SEP-13
Backup Piece 568 22-SEP-13 +DATADG/finaprim/backupset/2013_09_22/annnf0_tag20130922t233307_0.1887.826846387
Backup Set 569 22-SEP-13
Backup Piece 569 22-SEP-13 +DATADG/finaprim/autobackup/2013_09_22/s_826846388.1891.826846389
Backup Set 570 23-SEP-13
Backup Piece 570 23-SEP-13 +DATADG/finaprim/backupset/2013_09_23/annnf0_tag20130923t233004_0.1041.826932605
Backup Set 571 23-SEP-13
Backup Piece 571 23-SEP-13 +DATADG/finaprim/backupset/2013_09_23/nnndf0_tag20130923t233020_0.776.826932621
Backup Set 572 23-SEP-13
Backup Piece 572 23-SEP-13 +DATADG/finaprim/backupset/2013_09_23/annnf0_tag20130923t233306_0.1895.826932787
Backup Set 573 23-SEP-13
Backup Piece 573 23-SEP-13 +DATADG/finaprim/autobackup/2013_09_23/s_826932787.1061.826932789
Backup Set 574 24-SEP-13
Backup Piece 574 24-SEP-13 +DATADG/finaprim/backupset/2013_09_24/annnf0_tag20130924t233005_0.1082.827019005
Do you really want to delete the above objects (enter YES or NO)? yes
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of delete command on ORA_DISK_1 channel at 09/25/2013 09:16:59
ORA-19606: Cannot copy or restore to snapshot control file
解决办法：
就是把SNAPSHOT CONTROLFILE的配置路径改变,然后删除控制文件快照
---重命名SNAPSHOT 文件
RMAN> CONFIGURE SNAPSHOT CONTROLFILE NAME TO '/u01/app/oracle/product/11.2.0/dbhome_1/dbs/snapcf_finaprim.f_bak';
new RMAN configuration parameters:
CONFIGURE SNAPSHOT CONTROLFILE NAME TO '/u01/app/oracle/product/11.2.0/dbhome_1/dbs/snapcf_finaprim.f_bak';
new RMAN configuration parameters are successfully stored
---- crosscheck
RMAN> crosscheck controlfilecopy '/u01/app/oracle/product/11.2.0/dbhome_1/dbs/snapcf_finaprim.f';
released channel: ORA_DISK_1
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=174 device type=DISK
validation failed for control file copy
control file copy file name=/u01/app/oracle/product/11.2.0/dbhome_1/dbs/snapcf_finaprim.f RECID=1 STAMP=824231734
Crosschecked 1 objects
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