下班的时候，想不到又碰到了ORA-19815错误，这个10g的数据库最近数据量狂增，天天产生大约5~6个G的归档：
ORA-19815: WARNING: db_recovery_file_dest_size of 53687091200 bytes is 85.00% used,
and has 8052259328 remaining bytes available.
*************************************************************
You have the following choices to free up space from
flash recovery area:
1. Consider changing your RMAN retention policy.
If you are using dataguard, then consider changing your
RMAN archivelog deletion policy.
2. Backup files to tertiary device sUCh as tape using the
RMAN command BACKUP RECOVERY AREA.
3. Add disk space and increase the db_recovery_file_dest_size
parameter to reflect the new space.
4. Delete unncessary files using the RMAN DELETE command.
If an OS command was used to delete files, then use
RMAN CROSSCHECK and DELETE EXPIRED commands.
db_recovery_file_dest_size设置的是50G，在当前的备份策略下已经不足够。只好临时扩展一下恢复区：
SQL> show parameter recov
NAME TYPE VALUE
------------------------------------ ----------- ------------
db_recovery_file_dest string /msflsh
db_recovery_file_dest_size big integer 50G
recovery_parallelism integer 0
SQL> alter system set db_recovery_file_dest_size=65G scope=both;
System altered.
SQL> show parameter recov
NAME TYPE VALUE
------------------------------------ ----------- ----------------
db_recovery_file_dest string /msflsh
db_recovery_file_dest_size big integer 65G
recovery_parallelism integer 0
再修改下冗余策略，释放部分磁盘空间：
$ rman target /
Recovery Manager: Release 10.1.0.3.0 - 64bit Production
Copyright (c) 1995, 2004, Oracle. All rights reserved.
connected to target database: MMSDB (DBID=799462343)
RMAN> show all;
using target database controlfile instead of recovery catalog
RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 2;
....
RMAN> CONFIGURE RETENTION POLICY TO REDUNDANCY 1;
old RMAN configuration parameters:
CONFIGURE RETENTION POLICY TO REDUNDANCY 2;
new RMAN configuration parameters:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1;
new RMAN configuration parameters are successfully stored
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=127 devtype=DISK
Deleting the following obsolete backups and copies:
Type Key Completion Time Filename/Handle
-------------------- ------ ------------------ --------------------
Backup Set 672 27-NOV-05
Backup Piece 672 27-NOV-05
/msflsh/MMSDB/backupset/2005_11_27/o1_mf_annnn_TAG20051127T043004_1rkkggjh_.bkp
Backup Set 673 27-NOV-05
Backup Piece 673 27-NOV-05
/msflsh/MMSDB/backupset/2005_11_27/o1_mf_annnn_TAG20051127T043004_1rkkh05d_.bkp
Backup Set 674 27-NOV-05
Backup Piece 674 27-NOV-05
/msflsh/MMSDB/backupset/2005_11_27/o1_mf_annnn_TAG20051127T043004_1rkkhvtb_.bkp
Backup Set 676 28-NOV-05
Backup Piece 676 28-NOV-05
/msflsh/MMSDB/backupset/2005_11_28/o1_mf_annnn_TAG20051128T043004_1rn5tfoo_.bkp
Backup Set 718 03-DEC-05
Backup Piece 718 03-DEC-05
/msflsh/MMSDB/autobackup/2005_12_03/o1_mf_s_576045489_1s1d5kgd_.bkp
Do you really want to delete the above objects (enter YES or NO)? yes
deleted backup piece
backup piece handle=/msflsh/MMSDB/backupset/2005_11_27/
o1_mf_annnn_TAG20051127T043004_1rkkggjh_.bkp recid=672 stamp=575440206
deleted backup piece
backup piece handle=/msflsh/MMSDB/backupset/2005_11_27/
o1_mf_annnn_TAG20051127T043004_1rkkh05d_.bkp recid=673 stamp=575440224
deleted backup piece
backup piece handle=/msflsh/MMSDB/backupset/2005_11_27/
o1_mf_annnn_TAG20051127T043004_1rkkhvtb_.bkp recid=674 stamp=575440251
deleted backup piece
backup piece handle=/msflsh/MMSDB/backupset/2005_11_28/
o1_mf_annnn_TAG20051128T043004_1rn5tfoo_.bkp recid=676 stamp=575526605
deleted backup piece
backup piece handle=/msflsh/MMSDB/autobackup/2005_12_03/
o1_mf_s_576045489_1s1d5kgd_.bkp recid=718 stamp=576045489
Deleted 5 objects
RMAN> exit
Recovery Manager complete.
赶紧跑回家，北京冷的要命了，明天需要重新规划一下这个数据库了。以前的设计容量太小了。
