ALTER TABLESPACE ora_data DEFAULT STORAGE ( INITIAL 100K 
                                   NEXT 100K 
			     MINEXTENTS 1 
			     MAXEXTENTS 300 
			    PCTINCREASE 1);
Exemple de requete generique reutilisable:
select a.tablespace_name Tablespace,
	   b.tablespace_name  "Nom TBS",
     ddf.file_name  "Nom Fichier",
     ddf.autoextensible   "Auto extend",
	   sum(b.bytes)/1024/1024/count( distinct a.file_id||'.'||a.block_id )      	Total,
	   round(sum(b.bytes)/1024/1024/count( distinct a.file_id||'.'||a.block_id ) -
	   sum(a.bytes)/1024/1024/count( distinct b.file_id ),2)			  used,
	   round(sum(a.bytes)/1024/1024/count( distinct b.file_id ),2)                   Libre,
	   round(100 * ( (sum(b.bytes)/count( distinct a.file_id||'.'||a.block_id )) -
			   (sum(a.bytes)/count( distinct b.file_id ) )) /
	   (sum(b.bytes)/count( distinct a.file_id||'.'||a.block_id )),2) Pourcentage 
from sys.dba_free_space a, 
sys.dba_data_files b, 
dba_data_files ddf 
where a.tablespace_name = b.tablespace_name
and   b.tablespace_name=ddf.tablespace_name
group by  a.tablespace_name, 
          b.tablespace_name,
          ddf.file_name,
          ddf.autoextensible
order by Pourcentage desc;
Résultat de la commande:
--UNDOTBS UNDOTBS /oradata/ORA12004/undo/ora12004_undotbs01.dbf 2500 2110,75 389,25 84,43 --J2_DAT_01 J2_DAT_01 /oradata/ORA12004/data01/j2_aa_data02.dbf 27500 20189,69 7310,31 73,42 --J2_DAT_01 J2_DAT_01 /oradata/ORA12004/data01/j2_aa_data01.dbf 27500 20189,69 7310,31 73,42 --SYSAUX SYSAUX /oradata/ORA12004/system/ora12004_sysaux01.dbf 400 290,10 109,81 72,55 --SYSTEM SYSTEM /oradata/ORA12004/system/ora12004_system01.dbf 400 257,75 142,25 64,44 --TOOLS TOOLS /oradata/ORA12004/audi/j2_aa_audit01.dbf 500 253,81 246,19 50,76 --J2_IND_01 J2_IND_01 /oradata/ORA12004/indx01/j2_aa_indx01.dbf 61440 25433,88 36006,13 41,40 --J2_IND_01 J2_IND_01 /oradata/ORA12004/indx01/j2_aa_indx02.dbf 61440 25433,88 36006,13 41,40 --J2_IND_01 J2_IND_01 /oradata/ORA12004/indx01/j2_aa_indx03.dbf 61440 25433,88 36006,13 41,40 --J2_IND_ARCH_01 J2_IND_ARCH_01 /oradata/ORA12004/indxarch01/j2_aa_indx01_arch.dbf 17000 3762,06 13237,94 22,13 --J2_DAT_ARCH_01 J2_DAT_ARCH_01 /oradata/ORA12004/dataarch01/j2_aa_data01_arch.dbf 5500 920,06 4579,94 16,73
ALTER DATABASE DATAFILE '/oradata/ORA12004/undo/ora12004_undotbs01.dbf' RESIZE 2500M;