Its showing up '-1'. May be descriptive purpose comments are like that . Verson is 815 .

TABLESPACE USERNAME BYTES MAX_BYTES BLOCKS MAX_BLOCKS
---------- ---------- --------- --------- --------- ----------
TOOLS SYSTEM 102522880 -1 25030 -1
TEMP SYSTEM 0 -1 0 -1
USERS SFAGO 0 -1 0 -1
USERS HELER 0 -1 0 -1
TEMP HLLER 0 -1 0 -1
USERS PROD 0 -1 0 -1
USERS NAV3 626688 -1 153 -1