how to shrink undo tablespace on 10GR2?

  • From: dba1 mcc <mccdba1@xxxxxxxxx>
  • To: oracle-l@xxxxxxxxxxxxx
  • Date: Tue, 19 Oct 2010 07:43:51 -0700 (PDT)

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.


      
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