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[oracle@netbackuptest bin]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.2.0 Production on Sat Nov 26 07:57:52 2011

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Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> select length(addr)*4 || '-bits' word_length from v$process where rownum=1;

WORD_LENGTH
---------------------------------------------
64-bits

SQL>

SQL> SELECT /* + RULE */ df.tablespace_name "Tablespace",
2 df.bytes / (1024 * 1024) "Size (MB)",
3 SUM(fs.bytes) / (1024 * 1024) "Free (MB)",
4 Nvl(Round(SUM(fs.bytes) * 100 / df.bytes),1) "% Free",
5 Round((df.bytes - SUM(fs.bytes)) * 100 / df.bytes) "% Used"
6 FROM dba_free_space fs,
7 (SELECT tablespace_name,SUM(bytes) bytes
8 FROM dba_data_files
9 GROUP BY tablespace_name) df
10 WHERE fs.tablespace_name (+) = df.tablespace_name
11 GROUP BY df.tablespace_name,df.bytes
12 UNION ALL
13 SELECT /* + RULE */ df.tablespace_name tspace,
14 fs.bytes / (1024 * 1024),
15 SUM(df.bytes_free) / (1024 * 1024),
16 Nvl(Round((SUM(fs.bytes) - df.bytes_used) * 100 / fs.bytes), 1),
17 Round((SUM(fs.bytes) - df.bytes_free) * 100 / fs.bytes)
18 FROM dba_temp_files fs,
19 (SELECT tablespace_name,bytes_free,bytes_used
20 FROM v$temp_space_header
21 GROUP BY tablespace_name,bytes_free,bytes_used) df
22 WHERE fs.tablespace_name (+) = df.tablespace_name
23 GROUP BY df.tablespace_name,fs.bytes,df.bytes_free,df.bytes_used
24 ORDER BY 4 DESC;
Tablespace Size (MB) Free (MB) % Free % Used
------------------------------ ---------- ---------- ---------- ----------
UNDOTBS1 130 102.5 79 21
USERS 5 3.625 73 28
VPX 1024 650.625 64 36
VUM 1000 601.75 60 40
SYSAUX 880 80.5625 9 91
SYSTEM 750 42.25 6 94
TEMP 119 0 0 100

7 rows selected.
SQL>