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;
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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