Tablespace

Definition:

A database storage unit that groups related logical structures together. The database data files are stored in tablespaces.

Query to List Tablespace Usage Greater Than 75 %:

select * from (SELECT /* + RULE */  df.tablespace_name "Tablespace",
       df.bytes / (1024 * 1024) "Size (MB)",
       SUM(fs.bytes) / (1024 * 1024) "Free (MB)",
       Nvl(Round(SUM(fs.bytes) * 100 / df.bytes),1) "% Free",
       Round((df.bytes - SUM(fs.bytes)) * 100 / df.bytes) "% Used"
  FROM dba_free_space fs,
       (SELECT tablespace_name,SUM(bytes) bytes
          FROM dba_data_files
         GROUP BY tablespace_name) df
 WHERE fs.tablespace_name (+)  = df.tablespace_name
 GROUP BY df.tablespace_name,df.bytes
UNION ALL
SELECT /* + RULE */ df.tablespace_name tspace,
       fs.bytes / (1024 * 1024),
       SUM(df.bytes_free) / (1024 * 1024),
       Nvl(Round((SUM(fs.bytes) - df.bytes_used) * 100 / fs.bytes), 1),
       Round((SUM(fs.bytes) - df.bytes_free) * 100 / fs.bytes)
  FROM dba_temp_files fs,
       (SELECT tablespace_name,bytes_free,bytes_used
          FROM v$temp_space_header
         GROUP BY tablespace_name,bytes_free,bytes_used) df
 WHERE fs.tablespace_name (+)  = df.tablespace_name
 GROUP BY df.tablespace_name,fs.bytes,df.bytes_free,df.bytes_used
 ORDER BY 4 ) tu
 where tu."% Used" > 75

Automated Sql Script to Add datafiles to Tablespace Exceeding 85 %

set echo off
set feedback off
set linesize 1000
set pagesize 0
set sqlprompt ''
set trimspool on
set headsep off

spool add_data_file.sql

SELECT 'ALTER TABLESPACE '||top.t_name||' ADD DATAFILE ''' ||SUBSTR(top.file_name, 1, INSTR(top.file_name, '/', -1))||
        SUBSTR(top.file_name, INSTR(top.file_name, '/', -1)+1, ( (INSTR(top.file_name, '.', -1)) - (INSTR(top.file_name, '/', -1)+1)) )||'_'||
        to_char(sysdate, 'yyyy_mm_dd')||
        SUBSTR(top.file_name, INSTR(top.file_name, '.', -1), length(top.file_name))||''' SIZE 2000M;'
        from
(select dt.tablespace_name t_name, max(ddf.file_name) file_name
from dba_tablespaces dt, dba_data_files ddf
where dt.tablespace_name = ddf.tablespace_name
and dt.CONTENTS like 'PERMANENT'
and dt.tablespace_name in (
select tu."Tablespace" from (SELECT /* + RULE */  df.tablespace_name "Tablespace",
       df.bytes / (1024 * 1024) "Size (MB)",
       SUM(fs.bytes) / (1024 * 1024) "Free (MB)",
       Nvl(Round(SUM(fs.bytes) * 100 / df.bytes),1) "% Free",
       Round((df.bytes - SUM(fs.bytes)) * 100 / df.bytes) "% Used"
  FROM dba_free_space fs,
       (SELECT tablespace_name,SUM(bytes) bytes
          FROM dba_data_files
         GROUP BY tablespace_name) df
 WHERE fs.tablespace_name (+)  = df.tablespace_name
 GROUP BY df.tablespace_name,df.bytes
UNION ALL
SELECT /* + RULE */ df.tablespace_name tspace,
       fs.bytes / (1024 * 1024),
       SUM(df.bytes_free) / (1024 * 1024),
       Nvl(Round((SUM(fs.bytes) - df.bytes_used) * 100 / fs.bytes), 1),
       Round((SUM(fs.bytes) - df.bytes_free) * 100 / fs.bytes)
  FROM dba_temp_files fs,
       (SELECT tablespace_name,bytes_free,bytes_used
          FROM v$temp_space_header
         GROUP BY tablespace_name,bytes_free,bytes_used) df
 WHERE fs.tablespace_name (+)  = df.tablespace_name
 GROUP BY df.tablespace_name,fs.bytes,df.bytes_free,df.bytes_used
 ORDER BY 4 ) tu
 where tu."% Used" > 85
)
group by dt.tablespace_name) top
/

spool off;

@add_data_file.sql

exit;