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dba_data_files£º
file_name                 Êý¾ÝÎļþÃû¼°Â·¾¶
file_id                      Êý¾ÝÎļþ±êʶ
bytes                       Êý¾ÝÎļþ´óС
bocks                      Êý¾ÝÎļþ´óС¶ÔÓ¦µÄÊý¾Ý¿â¿éÊý
tablespace_name     Êý¾ÝÎļþ¶ÔÓ¦µÄ±í¿Õ¼äÃû³Æ
autoextensible          Êý¾Ý¿âÎļþÊÇ·ñ¿ÉÒÔ×Ô¶¯À©Õ¹
maxbytes      
maxblocks               ¸ÃÎļþ×î´ó¿ÉÒÔÀ©Õ¹µÄ×Ö½ÚÊý£¬¼°Êý¾Ý¿éÊý¡£
user_bytes
user_blocks            ±íʾÓû§ËùÄÜʹÓõÄÊý¾ÝÎļþ´óС£¬Í¨¹ýµÈÓÚ datafile size-LMT/DMTËùʹÓõĿռ䡣
#¹ØÓÚ×Ô¶¯À©Õ¹ÊôÐÔ
alter tablespace ...
datafile '...' size ...
autoextent on
next ...
maxsize ...

#LML(local management tablespace)
alter tablespace ...
datafile '...' size ...
extent management local autoallocate/uniform size ...;

#DML(dictionary management tablespace)
create tablespace ...
datafile '...' size ...
extent management dictionary
blocksize ...
default storage (initial
                        next
                        minextents
                        maxextents
                        pctincrease     )

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dba_free_space£º
bytes,blocks             ±íʾ¸Ã±í¿Õ¼ä¿ÕÏпռä´óС¼°¿éÊý

v$filestat£º
phyrds,phywrts         ±íʾÎïÀí´ÅÅ̶Á¡¢Ð´µÄÊý¾Ý¿â

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