学习笔记(05):Oracle数据库性能优化整套方法论之系统与实例优化-配置undo tablespace(上)...
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-----------------------undo_tablespace
what is undo?
undo的用途:
1、ROLLBACK回滚数据
2、恢复数据库
3、
automatic undo management
undo表空间监控
undo表空间切换