rollback segment中文什么意思

例句与用法

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1. recreate the rollback tablespace with all of its rollback segments
   用它的所有回滚段重新创建回滚表空间。
2. create few additional rollback segments to handle the database activities
   创建少数附加回滚段来处理数据库活动。
3. a rollback segment is only online until the instance is shut down
   直到实例关闭后，回滚段才联机。不明白什么意思。
4. the database was not cleanly shut down there are active transactions in the rollback segments
   数据库没有彻底关闭（在回滚段中有活动的事务）。
5. recovering from the loss of a data file that belongs to a traditional rollback segment tablespace
   从属于传统回滚段表空间的数据文件的丢失中恢复。