oracle 在线删除归档、闪回日志后
因为开启归档、闪回后，空间磁盘不够了。没有多想就在数据库处于open状态下，rm了所有的归档、闪回日志。等到重启数据库时出现错误：
SQL> conn /as sysdba
Connected to an idle instance.
SQL> startup
ORACLE instance started.
Total System Global Area 422670336 bytes
Fixed Size 1336960 bytes
Variable Size 310380928 bytes
Database Buffers 104857600 bytes
Redo Buffers 6094848 bytes
Database mounted.
ORA-38760: This database instance failed to turn on flashback database
处理过程如下：
先关闭数据库的闪回功能，再alter database open：
SQL>
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
还是同一个错误。
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