V$FLASHBACK_DATABASE_STAT displays statistics for monitoring the I/O overhead of logging flashback data.
This view also displays the estimated flashback space needed based on previous workloads.
| Column | Datatype | Description |
|---|
BEGIN_TIME | DATE | Beginning of the time interval |
END_TIME | DATE | End of the time interval |
FLASHBACK_DATA | NUMBER | Number of bytes of flashback data written during the interval |
DB_DATA | NUMBER | Number of bytes of database data read and written during the interval |
REDO_DATA | NUMBER | Number of bytes of redo data written during the interval |
ESTIMATED_FLASHBACK_SIZE | NUMBER | Value of ESTIMATED_FLASHBACK_SIZE inV$FLASHBACK_DATABASE_LOG at the end of the time interval |

本文详细介绍了SQL闪回数据监控的工具V$FLASHBACK_DATABASE_STAT视图,包括其显示的I/O开销、闪回数据写入数量、数据库数据读写量、重做数据写入量以及估计的闪回空间需求等关键信息。通过此视图,数据库管理员可以有效地监控和管理闪回操作带来的资源消耗。
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