flash_recovery_area空间不足报错

• 现象
• 基本原因
• 解决方法

现象

…
2235_g28w3d16_.bkp tag=TAG20181227T142235 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:02
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================

RMAN-03009: failure of backup command on ORA_DISK_1 channel at 12/27/2018 14:25:46
ORA-19809: limit exceeded for recovery files
ORA-19804: cannot reclaim 52428800 bytes disk space from 4294967296 limit

基本原因

db_recovery_file_dest有size 2G限制，如果用户没有设置过，应该是归档的文件超过了这个大小，导致归档失败了。
查看：

SQL> archive log list
Database log mode              Archive Mode
Automatic archival             Enabled
Archive destination            /u01/app/oracle/archive_log
Oldest online log sequence     255
Next log sequence to archive   257
Current log sequence           257
SQL> show parameter db_recovery_file_dest_size

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
db_recovery_file_dest_size           big integer 2G

解决方法

删除多余归档，然后是指定大的db_recovery_file_dest_size
找出无效的expired的归档日志

RMAN> crosscheck archivelog all;

using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=1619 devtype=DISK
validation succeeded for archived log
archive log filename=/u01/app/oracle/archive_log/1_254_974460126.dbf recid=98 stamp=995973231
validation succeeded for archived log
archive log filename=/u01/app/oracle/archive_log/1_255_974460126.dbf recid=99 stamp=995973433
validation succeeded for archived log
archive log filename=/u01/app/oracle/archive_log/archive_1_256_974460126.log recid=100 stamp=995973902
Crosschecked 3 objects

直接全部删除过期的日志

RMAN> delete expired archivelog all;

released channel: ORA_DISK_1
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=1619 devtype=DISK
specification does not match any archive log in the recovery catalog

也可以直接用一个指定的日期来删除

RMAN> delete noprompt archivelog until time "sysdate -3";

released channel: ORA_DISK_1
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=1619 devtype=DISK
specification does not match any archive log in the recovery catalog

指定retention的策略，使archivelog不至于这样增加

7天外的备标记为expired

RMAN> configure retention policy to recovery window of 7 days;

new RMAN configuration parameters:
CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 7 DAYS;
new RMAN configuration parameters are successfully stored

RMAN> configure retention policy to redundancy 3;

using target database control file instead of recovery catalog
old RMAN configuration parameters:
CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 7 DAYS;
new RMAN configuration parameters:
CONFIGURE RETENTION POLICY TO REDUNDANCY 3;
new RMAN configuration parameters are successfully stored

更改限制

SQL> alter system set db_recovery_file_dest_size=4G scope=both;

System altered.

也可以更改到没有限制的地方

SQL> alter system set log_archive_dest='/home/oracle';