Oracle闪回区满(ORA-16014)

     一台老的测试AIX服务器，没人理过，最近一看Oracle闪回满了。清理了下。

Version: Oracle 10gR2 for AIX

现象:     

SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-16014: log 3 sequence# 157 not archived, no available destinations
ORA-00312: online log 3 thread 1:
'/opt/oracle/software/oradata/orcl/redo03.log'

报这个错误是因为闪回区满了：   

-- 扩大闪回区空间
SQL> alter system set db_recovery_file_dest_size=3g scope=both;

System altered.

SQL> alter database open;

Database altered.

闪回区相关信息查询:  

--查看归档模式
 SQL> archive log list;

--归档空间使用率
SQL> select * from v$flash_recovery_area_usage;

--闪回区所占用的空间
SQL> select sum(percent_space_used)*3/100 from v$flash_recovery_area_usage;

释放空间:

--删除备份
crosscheck backupset;
delete noprompt expired backupset;
delete obsolete;
delete noprompt expired backup;
delete noprompt expired copy;

--清掉归档
--清掉过期的归档
crosscheck archivelog all;
delete noprompt expired archivelog all;
--要还不够，强制删除掉指定天数前的归档
delete noprompt archivelog all completed before 'sysdate-7';

除了在闪回区删文件，或扩空间的方式，还可以通过将归档指定到其它目录的方式来做。  

SQL> alter system set log_archive_dest_1='location=/nfsdisk/oraarc' scope=both ;

System altered.

SQL> archive log list;
Database log mode              Archive Mode
Automatic archival             Enabled
Archive destination            /nfsdisk/oraarc
Oldest online log sequence     161
Next log sequence to archive   161
Current log sequence           163

  设完成后，测试一下:
SQL>alter system switch logfile;
但我测试时，因为粗心，授权时没注意，导致执行时发现被卡住了，检查v$archive_dest，
发现LOG_ARCHIVE_DEST_1状态为ERROR. 这个是目录权限问题引起的。 

SQL> col DESTINATION format a20
SQL> col dest_name format a20
SQL> select dest_id,dest_name,STATUS,DESTINATION from v$archive_dest;

   DEST_ID DEST_NAME            STATUS             DESTINATION
---------- -------------------- ------------------ --------------------
         1 LOG_ARCHIVE_DEST_1   ERROR              /nfsdisk/oraarc
         2 LOG_ARCHIVE_DEST_2   INACTIVE
         3 LOG_ARCHIVE_DEST_3   INACTIVE
         4 LOG_ARCHIVE_DEST_4   INACTIVE
         5 LOG_ARCHIVE_DEST_5   INACTIVE
         6 LOG_ARCHIVE_DEST_6   INACTIVE
         7 LOG_ARCHIVE_DEST_7   INACTIVE
         8 LOG_ARCHIVE_DEST_8   INACTIVE
         9 LOG_ARCHIVE_DEST_9   INACTIVE
        10 LOG_ARCHIVE_DEST_10  INACTIVE

10 rows selected.

重新授权一下目录所属用户和权限:

# chown oracle:oinstall /nfsdisk/oraarc
# chmod -R 777 /nfsdisk/oraarc

此时就可以归档成功了。

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