标题: ORA-30018: Create Rollback Segment failed [打印本页] 作者: admin 时间: 2016-9-4 19:05 标题: ORA-30018: Create Rollback Segment failed ORA-30018: Create Rollback Segment failed, USN string is out of range Cause: the system runs outof undo segment number. Too many undo segments
exist. Action: drop some of theunused undo segments and retry operation.