We have 10GR2 on Linux server. I found one database "undo" tablespace has been extend to 32 GB size. I used 'dba_free_space" to check and found this data file actually is empty. I tried to "resize" it back to small size but I can only resize it to 28GB. I knew this may be cause by "high water mark". Does there has way to shrink it to small? Thanks. -- //www.freelists.org/webpage/oracle-l