Oracle monitor occupied space for each tablespace

Oracle monitor occupied space for each tablespace

/*
Copyright (c) 2015, Gheorghita Stanciu gheorghita(dot)stanciu(at)gmail(dot)com
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met: 

1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer. 
2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution. 

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

The views and conclusions contained in the software and documentation are those
of the authors and should not be interpreted as representing official policies, 
either expressed or implied, of the FreeBSD Project.
*/

set linesize 10000;
set pagesize 50000;
set trimspool on;

spool free_space.txt;

select distinct substr("NAME",
                       1,
                       case
                         when instr("NAME", '\', -1) > instr("NAME", '/', -1) then
                          instr("NAME", '\', -1)
                         else
                          instr("NAME", '/', -1)
                       end) as "Path"
  from v$datafile
 order by 1;

column "Tablespace"  format a32
column "Used MB"     format 99,999,999
column "Free MB"     format 99,999,999
column "Total MB"    format 99,999,999
column "Max Size MB" format 99,999,999
column "Pct. Free" format 99,999,999.00
select fs.tablespace_name "Tablespace",
       (df.totalspace - fs.freespace) "Used MB",
       fs.freespace "Free MB",
       df.totalspace "Total MB",
       df.max_size "Max Size MB",
       100 - round(100 * ((df.totalspace - fs.freespace) / df.max_size), 2) "Pct. Free"
  from (select tablespace_name,
               round(sum(bytes) / 1048576) TotalSpace,
               round(sum(decode(autoextensible, 'YES', maxbytes, 'NO', bytes)) /
                     1048576) max_size
          from dba_data_files
         group by tablespace_name) df,
       (select tablespace_name, round(sum(bytes) / 1048576) FreeSpace
          from dba_free_space
         group by tablespace_name) fs
 where df.tablespace_name = fs.tablespace_name
 order by fs.tablespace_name;

-- now I need to know what datafiles are created for each tablespace that have less than 50% free space

select distinct substr(v."NAME",
                       case
                         when instr(v."NAME", '\', -1) > instr(v."NAME", '/', -1) then
                          instr(v."NAME", '\', -1)
                         else
                          instr(v."NAME", '/', -1)
                       end + 1) as "File"
  from v$datafile v, v$tablespace t
 where v."TS#" = t."TS#"
   and t.NAME in
       (select fs.tablespace_name
          from (select tablespace_name,
                       round(sum(bytes) / 1048576) TotalSpace,
                       round(sum(decode(autoextensible,
                                        'YES',
                                        maxbytes,
                                        'NO',
                                        bytes)) / 1048576) max_size
                  from dba_data_files
                 group by tablespace_name) df,
               (select tablespace_name, round(sum(bytes) / 1048576) FreeSpace
                  from dba_free_space
                 group by tablespace_name) fs
         where df.tablespace_name = fs.tablespace_name
           and (100 -
               round(100 * ((df.totalspace - fs.freespace) / df.max_size),
                      2) <= 50))
 order by 1;
spool off;
exit;
/