flashback_area 区域溢出导致数据库宕机

问题：

ORA-00257       
ORA-16014 log 1 sequence# 1085 not archived,no available destinations
ORA-00312 online log 1 thread 1 'usrapporacleoradatawanyanredo01.log'

检查步骤：

SQL>shutdown immediate
SQL>startup
ORA-00257       
ORA-16014 log 1 sequence# 1085 not archived,no available destinations
ORA-00312 online log 1 thread 1 'usrapporacleoradatawanyanredo01.log'


SQL> alter database open;
ERROR at line 1:
ORA-16014: log 1 sequence# 92 not archived,no available destinations
ORA-00312: online log 1 thread 1: 'C:ORACLEPRODUCT10.2.0ORADATAORCLREDO01.LOG'

SQL> select * from v$log
;

    GROUP#    THREAD#  SEQUENCE#      BYTES    MEMBERS ARC STATUS           FIRST_CHANGE# FIRST_TIME
---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- ----------
         1          1         93   52428800          1 NO  INACTIVE               4345718 04-FEB-09
         3          1         94   52428800          1 NO  INACTIVE               4347356 04-FEB-09
         2          1         95   52428800          1 NO  CURRENT                4368182 04-FEB-09

从以上信息猜测，由于GROUP1无法归档引起，检查归档空间

SQL> show parameter db_recovery_file_dest_size

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
db_recovery_file_dest_size           big integer 3G

解决问题步骤

第一种方法、删除recovery 文件

通过检查实际的归档文件夹后发现，实际使用的归档空间的远远小于3G，猜测可能由于手工删除归档日志所致。
采用以下方法解决：

当手工删除了归档日志以后，Rman备份会检测到日志缺失，从而无法进一步继续执行。
所以此时需要手工执行crosscheck过程，之后Rman备份可以恢复正常。
1.crosscheck日志

$ rman target /
Recovery Manager: Release 9.2.0.4.0 - 64bit Production
Copyright (c) 1995,2002,Oracle Corporation. All rights reserved.
connected to target database: AVATAR2 (DBID=2480694409)

RMAN> crosscheck archivelog all;

using target database controlfile instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=25 devtype=DISK
validation failed for archived log
.........................................

2.使用delete expired archivelog all 命令删除所有过期归档日志:

RMAN> delete expired archivelog all;


RCLARCHIVELOG2009_02_04O1_MF_1_86_4RL2RJWB_.ARC
81      1    87      X 04-2月 -09 C:ORACLEPRODUCT10.2.0FLASH_RECOVERY_AREAO
RCLARCHIVELOG2009_02_04O1_MF_1_87_4RL2RYGN_.ARC
82      1    88      X 04-2月 -09 C:ORACLEPRODUCT10.2.0FLASH_RECOVERY_AREAO
RCLARCHIVELOG2009_02_04O1_MF_1_88_4RL2SGFO_.ARC
83      1    89      X 04-2月 -09 C:ORACLEPRODUCT10.2.0FLASH_RECOVERY_AREAO
RCLARCHIVELOG2009_02_04O1_MF_1_89_4RL2SY0H_.ARC
84      1    90      X 04-2月 -09 C:ORACLEPRODUCT10.2.0FLASH_RECOVERY_AREAO
RCLARCHIVELOG2009_02_04O1_MF_1_90_4RL2TOB8_.ARC
85      1    91      X 04-2月 -09 C:ORACLEPRODUCT10.2.0FLASH_RECOVERY_AREAO
RCLARCHIVELOG2009_02_04O1_MF_1_91_4RL2VHC7_.ARC

SQL> alter database open;
 

Database altered.

?

第二种方法：修改默认参数文件，让数据库允许存放过大的recovery文件

据数据库目前可用存储空间为200GB、FLASH_RECOVERY_AREA空间为2GB的实际情况，把FLASH_RECOVERY_AREA的空间修改为20GB。

alter system set DB_RECOVERY_FILE_DEST_SIZE=20g;