ORA-38760: This database instance failed to turn on flashback database

时间 2019-11-07

标签 ora database instance failed turn flashback 栏目 Flash 繁體版

原文原文链接

昨晚学习ORACLE用HR用户执行：create table reg_copy as select * from regions;竟然一片空白没有任何反应，不想强行退出，因而用ORACLE用户来终止会话的方式来处理，前后用了三种方式：html

第一种：select sid,serial# from v$session where username='HR';sql

而后用：ALTER SYSTEM KILL SESSION 'sid,serial#' IMMEDIATE。数据库

第二种：ALTER SYSTEM DISCONNECT SESSION 'sid,serial#' IMMEDIATE
session

第三种：用如下命令查到系统级别的进程号，而后杀掉。ide

SET LINESIZE 100

COLUMN spid FORMAT A10

COLUMN username FORMAT A10

COLUMN program FORMAT A45

SELECT s.inst_id,

       s.sid,

       s.serial#,

       p.spid,

       s.username,

       s.program

FROM   gv$session s

       JOIN gv$process p ON p.addr = s.paddr AND p.inst_id = s.inst_id

WHERE  s.type != 'BACKGROUND';

结果今天起来起动数据库就有以下提示了：学习

SQL> startup
ORACLE instance started.
Total System Global Area 1536602112 bytes
Fixed Size            2213616 bytes
Variable Size          956303632 bytes
Database Buffers      570425344 bytes
Redo Buffers            7659520 bytes
Database mounted.
ORA-38760: This database instance failed to turn on flashback database

不知跟昨天的事有没有关系，先记录下来。晚些作实现进一步验证。先记录处理此故障的步骤。ui

SQL> shutdown immediate;
ORA-01109: database not open

Database dismounted.
ORACLE instance shut down.
SQL> startup
ORACLE instance started.

Total System Global Area 1536602112 bytes
Fixed Size            2213616 bytes
Variable Size          956303632 bytes
Database Buffers      570425344 bytes
Redo Buffers            7659520 bytes
Database mounted.
ORA-38760: This database instance failed to turn on flashback database

SQL> alter database flashback on;
alter database flashback on
*
ERROR at line 1:
ORA-38706: Cannot turn on FLASHBACK DATABASE logging.
ORA-38713: Flashback Database logging is already turned on.

SQL> alter database flashback off;

Database altered.

SQL> alter database flashback on;
alter database flashback on
*
ERROR at line 1:
ORA-38706: Cannot turn on FLASHBACK DATABASE logging.
ORA-38714: Instance recovery required.

SQL> alter database flashback off;

Database altered.

SQL> shutdown immediate;
ORA-01109: database not open

Database dismounted.
ORACLE instance shut down.
SQL> startup mount;
ORACLE instance started.

Total System Global Area 1536602112 bytes
Fixed Size            2213616 bytes
Variable Size          956303632 bytes
Database Buffers      570425344 bytes
Redo Buffers            7659520 bytes
Database mounted.
SQL> alter database flashback on;
alter database flashback on
*
ERROR at line 1:
ORA-38706: Cannot turn on FLASHBACK DATABASE logging.
ORA-38714: Instance recovery required.

spa

SQL> select FLASHBACK_ON from v$database;

FLASHBACK_ON
------------------
RESTORE POINT ONLY

SQL> alter database force logging;

Database altered.

SQL> alter database flashback off;

Database altered.

SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-38760: This database instance failed to turn on flashback database

SQL> shutdown immediate;
ORA-01109: database not open

Database dismounted.
ORACLE instance shut down.
SQL> startup mount;
ORACLE instance started.

Total System Global Area 1536602112 bytes
Fixed Size            2213616 bytes
Variable Size          956303632 bytes
Database Buffers      570425344 bytes
Redo Buffers            7659520 bytes
Database mounted.
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-38760: This database instance failed to turn on flashback database

SQL> alter database flashback on;
alter database flashback on
*
ERROR at line 1:
ORA-38706: Cannot turn on FLASHBACK DATABASE logging.
ORA-38714: Instance recovery required.

SQL> recover database;
ORA-00283: recovery session canceled due to errors
ORA-38760: This database instance failed to turn on flashback database
.net

参考大牛的文章，说是跟还原点有关系。
SQL> col name for a30
SQL> /

NAME                   TO_CHAR(TIME,'YYYY/ GUA
------------------------------ ------------------- ---
B1                   2016/06/06 23:03:58 YES

SQL> alter database flashback off;

Database altered.

SQL> select flashback_on from v$database;

FLASHBACK_ON
------------------
RESTORE POINT ONLY

SQL> drop restore point b1;

Restore point dropped.

SQL> select flashback_on from v$database;

FLASHBACK_ON
------------------
NO

SQL> select open_mode from v$database;

OPEN_MODE
--------------------
MOUNTED

SQL> alter database flashback on;
alter database flashback on
*
ERROR at line 1:
ORA-38706: Cannot turn on FLASHBACK DATABASE logging.
ORA-38714: Instance recovery required.

SQL> recover database;
Media recovery complete.
SQL> alter database flashback on;
alter database flashback on
*
ERROR at line 1:
ORA-38706: Cannot turn on FLASHBACK DATABASE logging.
ORA-38714: Instance recovery required.

SQL> recover database;
ORA-00283: recovery session canceled due to errors
ORA-00264: no recovery required

SQL> shutdown immediate;
ORA-01109: database not open

Database dismounted.
ORACLE instance shut down.
SQL> startup mount;
ORACLE instance started.

Total System Global Area 1536602112 bytes
Fixed Size            2213616 bytes
Variable Size          956303632 bytes
Database Buffers      570425344 bytes
Redo Buffers            7659520 bytes
Database mounted.
SQL> alter database flashback on;
alter database flashback on
*
ERROR at line 1:
ORA-38706: Cannot turn on FLASHBACK DATABASE logging.
ORA-38714: Instance recovery required.

SQL> recover database;
ORA-00283: recovery session canceled due to errors
ORA-00264: no recovery required

SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01139: RESETLOGS option only valid after an incomplete database recovery

SQL> alter database open;

Database altered.

SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup
ORACLE instance started.

Total System Global Area 1536602112 bytes
Fixed Size            2213616 bytes
Variable Size          956303632 bytes
Database Buffers      570425344 bytes
Redo Buffers            7659520 bytes
Database mounted.
Database opened.
SQL> select flashback_on,log_mode from v$database;

FLASHBACK_ON       LOG_MODE
------------------ ------------
NO           ARCHIVELOG

SQL> alter database flashback on;

Database altered.
SQL> select flashback_on,log_mode from v$database;

FLASHBACK_ON       LOG_MODE
------------------ ------------
YES           ARCHIVELOG

结论：
unix

应该是因为数据库非一致性关闭致使的38760错误，若是重启flashback都报错38714，就删除还原点后，再重启数据库，能够正常启动了。之后仍是正常关机保险。

参考：http://blog.csdn.net/aaron8219/article/details/10129503

http://blog.chinaunix.net/uid-22948773-id-2821820.html