RE: Tablespace shrink, HWM, interval partitionig

  • From: Quamrul Polash <quapol@xxxxxxxxxxx>
  • To: <john.hallas@xxxxxxxxxxxxxxxxxx>, <s.cislaghi@xxxxxxxxx>, <oracle-l@xxxxxxxxxxxxx>
  • Date: Mon, 28 Mar 2011 16:49:54 +0000

What about using DBMS_REDEFINITION to reorganize the tables online? 

Q Polash

From: John.Hallas@xxxxxxxxxxxxxxxxxx
To: s.cislaghi@xxxxxxxxx; oracle-l@xxxxxxxxxxxxx
Date: Mon, 28 Mar 2011 15:54:59 +0100
Subject: RE: Tablespace shrink, HWM, interval partitionig

I sympathise Stefano as I am currently doing similar work. In my case we had a 
2.8Tb tablespace that had 56Gb of data in it. Another has 900Gb total and 500Gb 
free. In both cases the space was not at the end and therefore I could not 
resize the datafile downwards. I think that HWM on datafiles issue is an area 
that Oracle have completely overlooked.   Another problem I am seeing is that 
when you do identify which objects are at the end of the datafile and move them 
within the tablespace they do not necessarily go to the beginning and you can 
move objects around for no appreciable gain. Another word of caution if using 
rename tablespace after moving segments into a new tablespace beware ORA-00959 
due to a problem I blogged about  last week.
 -----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On 
Behalf Of Stefano Cislaghi
Sent: 28 March 2011 10:34
To: Oracle L
Subject: Tablespace shrink, HWM, interval partitionig My tablespace is about 
30gb. As HWM is at the end of tablespace I'vetried with ALTER TABLE ... MOVE 
PARTITION ... without success.Ok I know I can export, recreate tablespace and 
import. Also I canmove the table to another tablespace and move back ... but 
I'm lookingfor a correct solution to be used ONLINE.  


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