DB_FLASHBACK_RETENTION_TARGET参…

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DB_FLASHBACK_RETENTION_TARGET

 

Property Description
Parameter type Integer
Default value 1440 (minutes)
Modifiable ALTER SYSTEM
Range of values 0 to 232
 - 1 (max value represented by 32 bits)
Basic No


DB_FLASHBACK_RETENTION_TARGET specifies the upper limit (inminutes) on how
far back in time the database may be flashed back.

How far back one can flashback a database depends on how muchflashback data Oracle has kept in the flash recovery

 

也就是这个参数用来设定数据库可以最大闪回到的时间点,同时还要看有多少闪回数据在闪回区中,

这个参数也是flashback log的保留时间

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