select
TABLESPACE_NAME, -- TABLESPACE_NAME VARCHAR2(30)
FILE_ID, -- FILE_ID NUMBER
EXTENTS_CACHED, -- EXTENTS_CACHED NUMBER
EXTENTS_USED, -- EXTENTS_USED NUMBER
BLOCKS_CACHED, -- BLOCKS_CACHED NUMBER
BLOCKS_USED, -- BLOCKS_USED NUMBER
BYTES_CACHED, -- BYTES_CACHED NUMBER
BYTES_USED, -- BYTES_USED NUMBER
RELATIVE_FNO -- RELATIVE_FNO NUMBER
from
GV$TEMP_EXTENT_POOL
where
inst_id = USERENV('Instance')