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)...

立即学习:https://edu.csdn.net/course/play/10667/238272?utm_source=blogtoedu

-----------------------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