Oracle® Database 11g / 12c / 18c error codes ORA-01593: rollback segment optimal size ([string] blks) is smaller than the computed initial size ([string] blks)

ORA-01593: rollback segment optimal size ([string] blks) is smaller than the computed initial size ([string] blks)

Oracle Error Code: ORA-01593

Cause: Specified OPTIMAL size is smaller than the cumulative size of the initial extents during create rollback segment.

Action: Specify a larger OPTIMAL size.