Hello all,
I have an interesting problem on hand. I am using the following query to determine the
free space in table space and corressponding data files:-
SELECT d.tablespace_name,d.file_name,
SUM(d.bytes)/1048576,
free_space/1048576,
extent_cnt,
free_space/sum(d.bytes)*100,
count(*)
FROM dba_tablespaces t,
dba_data_files d,
(SELECT tablespace_name f_tablespace_name,
SUM(bytes) free_space,
count(*) extent_cnt
FROM dba_free_space
GROUP BY tablespace_name )
WHERE t.tablespace_name = d.tablespace_name AND
f_tablespace_name(+) = t.tablespace_name
GROUP BY d.tablespace_name, d.file_name, free_space, extent_cnt
/
Running the above query gives me :-
TbsName Datafile FreeSpace Extents TotalSpace %FreeSpac
TEMP temp01.dbf 318.82 1275 313.83 101.59
RBS rbs01.dbf 134.74 388 543.35 24.79
TEMP temp02.dbf 318.82 1275 5.00 6376.56
USERS users01.dbf **** **** 274.31 ****
SYSTEM system01.dbf 37.74 19 175.00 21.56
Now my questions that I confused are :-
1. How come it is showing for TEMP tablespace, the Free space is more than the total
space( for temp01.dbf free space is 318.92 MB and total space is 313.82 MB)? This is
illogical.
2. The %Free space for both the TEMP tablespace is showing as 101.59% and 6376.56%.
How is this possible?
3. It is not that the query is wrong is it? If so please tell me where? But for eg for
SYSTEM and RBS tablespace, it is showing correctly.
4. For USERS tablespace, it does not show any data for freespace or for extents or for
the %free space, makes me wonder what is going on here?
Can you please explain the above phenomena is happening?
Thanks a ton.
rgds,
raja
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