What about exporting the objects in that tablespace. Drop the tablespace
with huge datafile sizes, recreate with smaller data file sizes then
import the objects.
"Sheryl" <oracledba-ezmlmshield-x12107357.[Email address protected]
03/26/2008 09:23 AM
To
"LazyDBA Discussion" <[Email address protected]
cc
Subject
Deleting a datafile from a tablespace.
Hi All,
My prod DB is a 2-node Oracle 10g R1 RAC on HP-UX. The datafiles reside on
RAW Device.
We are presently doing a resizing of the Db. As a part of this activity we
were re-allocating the space from those Tablespaces that don't have much
usage , to the others with greater space usage.
I have a tablespace of 16 GB - two datafiles each of 8GB. But the space
utilization is approx 1 GB. And the data is not expected to grow much for
this tablespace. So I want to drop one of the datafiles associated with
this tablespace. The data is spread over both the datafiles.
To do the dropping of the datafile I have the following statements,
Either
Alter database datafile 'Path_of_datafile' offline;
Alter database datafile 'Path_of_datafile' drop;
Or
Alter database datafile 'Path_of_datafile' offline drop;
Now my queries are:-
1. Will the system allow me to drop the datafile if there is data in it
and it is offline?
2. How do I transfer data from one Dbf of tbs to other? that is,
If the tablespace A has 2 dbf's - A1.dbf and A2.dbf , how do I transfer
the data from A2.dbf to A1.dbf ?
3. Is export of tablespace --> drop tablespace --> recreate tablespace -->
import data to the new tablespace, the only option??
4. Will resizing the datafile to 0K as in "" Alter database datafile
'Path_of_datafile' resize 0 K; "" force the data to move from one dbf to
other of the same tbs? Or will it throw an error ,. since it has data more
than 0K size???
Thanks in advance,
Warm Regards,
Sheryl Philip
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