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How to Change Oracle Mount point on Linux serever

Posted on 2011-09-13
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Last Modified: 2013-12-19
Hi this is production server. Due recent increase of space usage, A new mount point /oracle/oradata2 have been created with 600GB on server ***dbprod.

"If Addtional space is required, please use the new mount point, the data files should be under /oracle/oradata2/prod. Please make sure the filenames are unique within the tablespaces. The original mount point /oracle is at 97%, we should not adding or expending any datafile there whenever possible. "

Please give me steps in brief to do this activity.

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Question by:udayveera123
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by:slightwv (䄆 Netminder)
ID: 36535679
Look for what data files are allowed to autoextend in the current filesystem:
select file_name,file_id,autoextensible from dba_data_files;

then disable them.

from:
http://download.oracle.com/docs/cd/B28359_01/server.111/b28310/dfiles003.htm

The next example disables the automatic extension for the datafile.
 ALTER DATABASE DATAFILE '/u02/oracle/rbdb1/users03.dbf'
    AUTOEXTEND OFF;


then you should probably alter the tablespaces and create autoextending datafiles on the new filesystem.

Same doc should have the syntax.


I suppose you could also just MOVE some of the datafiles to the new filesystem.
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by:udayveera123
ID: 36558396
Actually its Production DB, and current mount point is filled up to capacity, so i have to move it to new mount point. I am not able to extend datafiles due to lack of space.

so please guide me for the steps what should i have to follow.

Is there requirement of down time while doing this activity?
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slightwv (䄆 Netminder) earned 2000 total points
ID: 36560189
>>so please guide me for the steps what should i have to follow.

I thought I had.

>>Is there requirement of down time while doing this activity?

Minimal if you move some of the old data files to the new mount point.

If you just disable autoextend on the old files and add new datafiles to the existing tablespaces there is no downtime.

The link I posted above also shows the command:
ALTER TABLESPACE users
    ADD DATAFILE ...

What additional parameters you need to add are based on your configuration.  We really cannot say the exact ones you need to set or what their values should be.

Do you have a Senior DBA or someone that can assist you with this?
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