查看UNDO事务占用情况 SELECT s.username, s.sid, pr.PID, s.OSUSER, s.MACHINE, s.PROGRAM, rs.segment_id, r.usn, rs.segment_name, r.rssize/1024/1024, sq.sql_text FROM v$transaction t, v$session s, v$rollstat r, dba_rollback_segs rs ,v$sql sq,v$process prWHERE s.…