My production database is on oracle11g on windows 2008 R2 and i have setup datagaurd.My undo tablespace got full and i created another undo tablespace named undotbs1 and make it default on primary database. i have kept standby_file_management to auto. when i checked on standby database it is still showing old undo table space. i changed in pfile and created spfile from pfile and restarted the standby database still it is showing me old undo tablespace on standby database. Please suggest what can be done so that standby database should point to new undo tablespace.