Newbie: tablespace

[ulag]

Newbie question:

How to know the tablespace has auto-extend features?

The system tablespace (dictionary) in my database is almost filled-up. Does it have auto-extend features?

Please help me.

[rsuri]

AUTOEXTENSIBLE is a feature at datafile level (not tablespace level)

If your SYSTEM tablespace (meaning the datafiles underneath) is almost full you can do any of the following --

1. RESIZE the datafile to increase in size --

ALTER DATABASE DATAFILE 'C:\ORACLE\ORADATA\DBA1\SYSTEM01.DBF' RESIZE 200000K

2. Add a new datafile to the System tablespace --

ALTER TABLESPACE "SYSTEM" ADD DATAFILE 'C:\ORACLE\ORADATA\DBA1\SYSTEM02.DBF' SIZE 10M

3. Set the AUTOEXTEND on --

ALTER DATABASE DATAFILE 'C:\ORACLE\ORADATA\DBA1\SYSTEM01.DBF' AUTOEXTEND ON NEXT 20K

- Rajeev

[Dave_A]

You can see whether autoextend is enabled for a datafile by querying as follows, depending on Oracle version...

In Oracle 7

select f.tablespace_name, f.file_name, e.maxextend, e.inc
from dba_data_files f, sys.filext$ e
where f.file_id = e.file#;

Note that if the sys.filext$ view does not exist, no datafiles are set to autoextend.

In Oracle 8,

select f.tablespace_name, f.file_name, f.maxbytes, f.increment_by
from dba_data_files f
where f.autoextensible = 'YES';

Note that the inc and increment_by columns are both in database blocks.

HTH

David.