Oracle periodically checks the rollback segments of the database to see if they have
grown larger than their optimal size. If a rollback segment is larger than is optimal
(that is, it has too many extents), then Oracle automatically deallocates one or more
extents from the rollback segment.
Oracle定期检查会管段是否增长超过它们的optimal size , 假如超过 , Oracle从回滚段中
自动回收一个或者多个extents.
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/10599713/viewspace-968506/ ，如需转载，请注明出处，否则将追究法律责任。
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