Tablespaces

• Space management for 10g (oracle-base.com)

Update all datafiles in the database to be autoextend on and maxsize unlimited

A quick fix to ensure all tablespaces can be extended to the max. Have to keep an eye on the filesystem growth now.

set lines 1000 pages 0 newpa none feedb off trims on echo off termo off
spool fix_ts.sql
select 'alter database datafile '||''''||file_name||''''||' autoextend on maxsize unlimited;' from dba_data_files;
spool off
@fix_ts

User quotas on all tablespaces

col quota format a10
select username
,      tablespace_name
,      decode ( max_bytes
              , -1, 'unlimited'
              , ceil(max_bytes / 1024 / 1024)||'M'
              ) quota
from   dba_ts_quotas
where  1=1
and    tablespace_name not in ('TEMP');

Tablespace Growth Report 1

select b.tsname tablespace_name
,      MAX(b.used_size_mb) cur_used_size_mb
,      round(AVG(inc_used_size_mb),2) avg_increas_mb
from   ( SELECT a.days,a.tsname , used_size_mb , used_size_mb - LAG (used_size_mb,1) OVER ( PARTITION BY a.tsname ORDER BY a.tsname,a.days) inc_used_size_mb
from   ( SELECT TO_CHAR(sp.begin_interval_time,'MM-DD-YYYY') days  ,ts.tsname ,MAX(round((tsu.tablespace_usedsize* dt.block_size )/(1024*1024),2)) used_size_mb
from   dba_hist_tbspc_space_usage  tsu , dba_hist_tablespace_stat  ts ,dba_hist_snapshot  sp, dba_tablespaces  dt   where tsu.tablespace_id= ts.ts# AND tsu.snap_id = sp.snap_id
AND    ts.tsname = dt.tablespace_name AND sp.begin_interval_time > sysdate-7
GROUP  BY TO_CHAR(sp.begin_interval_time,'MM-DD-YYYY'), ts.tsname 
ORDER  BY ts.tsname, days ) a
       ) b
GROUP BY b.tsname ORDER BY b.tsname;

Tablespace Growth Report 2

The period range for this report is dependent on the snapshot retention period set for the db
[Original page]

set linesize 120
column name format a15
column variance format 9G990D00
alter session set nls_date_format='yyyy-mm-dd';
with t as (
select ss.run_time,ts.name,round(su.tablespace_size*dt.block_size/1024/1024/1024,2) alloc_size_gb,
round(su.tablespace_usedsize*dt.block_size/1024/1024/1024,2) used_size_gb
from
dba_hist_tbspc_space_usage su,
(select trunc(BEGIN_INTERVAL_TIME) run_time,max(snap_id) snap_id from dba_hist_snapshot
group by trunc(BEGIN_INTERVAL_TIME) ) ss,
v$tablespace ts,
dba_tablespaces dt
where su.snap_id = ss.snap_id
and   su.tablespace_id = ts.ts#
and   ts.name          =upper('&TABLESPACE_NAME')
and   ts.name          = dt.tablespace_name )
select e.run_time,e.name,e.alloc_size_gb,e.used_size_gb curr_used_size_gb,b.used_size_gb prev_used_size_gb,(e.used_size_gb - b.used_size_gb) variance
from t e, t b
where e.run_time = b.run_time + 1
order by 1;

What is the size of the segments in the SYSAUX tablespace?

set lines 2000
col owner for a30
col segment_name for a40
select owner
,      segment_name
,      (bytes/1024/1024) mb
from   dba_segments
where  tablespace_name = 'SYSAUX'
order  by bytes;

What are the components that make up the SYSAUX tablespace?

set lines 2000
col occupant_name  for a30 heading "Item"
col schema_name    for a20 heading "Schema"
col move_procedure for a50 heading "Move Procedure"
col used                   heading "Space Used (GB)"
select occupant_name
,      round(space_usage_kbytes/1048576,3) used
,      schema_name
,      move_procedure
from   v$sysaux_occupants
order  by 2
/

Segment Growth Report

column "Percent of Total Disk Usage" justify right format 999.99
column "Space Used (MB)" justify right format 9,999,999.99
column "Total Object Size (MB)" justify right format 9,999,999.99
set linesize 150
set pages 80
set feedback off

select * from (select to_char(end_interval_time, 'DD-MON-YY') mydate, sum(a.space_used_delta) / 1024 / 1024 "Space used (MB)", avg(c.bytes) / 1024 / 1024 "Total Object Size (MB)",
round(sum(space_used_delta) / sum(c.bytes) * 100, 2) "Percent of Total Disk Usage"
from
   dba_hist_snapshot sn,
   dba_hist_seg_stat a,
   dba_objects b,
   dba_segments c
where begin_interval_time > trunc(sysdate) - &days_back
and sn.snap_id = a.snap_id
and b.object_id = a.obj#
and b.owner = c.owner
and b.object_name = c.segment_name
and c.segment_name = '&segment_name'
group by to_char(end_interval_time, 'DD-MON-YY'))
order by to_date(mydate, 'DD-MON-YY')
/

Report of available free space in tablespaces

Original page
You probably have a problem with the autoextend max_size if column 5 is less than column 8!

set pages 400 lines 132
-------------------------------------------------------
-- free.sql  
--
-- This SQL Plus script lists freespace by tablespace
--------------------------------------------------------

column  dummy noprint
column  pct_used     format 999.9             heading "%|Used" 
column  name         format a25               heading "Tablespace Name" 
column  Kbytes       format 999,999,999,999   heading "KBytes" 
column  used         format 999,999,999,999   heading "Used" 
column  free         format 999,999,999,999   heading "Free" 
column  largest      format 999,999,999       heading "Largest" 
column  max_size     format 9,999,999,999,999 heading "MaxPoss|Kbytes"
column  pct_max_used format 999.9             heading "%|Max|Used" 
break   on report 
compute sum of kbytes on report 
compute sum of used   on report 
compute sum of free   on report 

select (
       select decode(extent_management,'LOCAL','*',' ') ||
              decode(segment_space_management,'AUTO','a ','m ')
       from   dba_tablespaces where tablespace_name = b.tablespace_name
       )    ||
       nvl(b.tablespace_name
,      nvl(a.tablespace_name,'UNKOWN')) name
,      kbytes_alloc kbytes
,      kbytes_alloc-nvl(kbytes_free,0) used
,      nvl(kbytes_free,0) free
,      ((kbytes_alloc-nvl(kbytes_free,0))/kbytes_alloc)*100 pct_used
,      nvl(largest,0) largest
,      nvl(kbytes_max,kbytes_alloc) Max_Size
,      decode( kbytes_max, 0, 0, (kbytes_alloc/kbytes_max)*100) pct_max_used
from   (
       select sum(bytes)/1024      kbytes_free
       ,      max(bytes)/1024      largest
       ,      tablespace_name
       from   sys.dba_free_space
       group  by tablespace_name
       ) a
,
       (
       select sum(bytes)/1024      kbytes_alloc
       ,      sum(maxbytes)/1024   kbytes_max
       ,      tablespace_name
       from   sys.dba_data_files
       group  by tablespace_name
       union all
       select sum(bytes)/1024      kbytes_alloc
       ,      sum(maxbytes)/1024   kbytes_max
       ,      tablespace_name
       from   sys.dba_temp_files
       group  by tablespace_name
       ) b
where  a.tablespace_name (+) = b.tablespace_name
order  by &1
/

If you are stuck on software written last century:

set pages 400 lines 132
-------------------------------------------------------
-- free.sql  
--
-- This SQL Plus script lists freespace by tablespace
--------------------------------------------------------

column  dummy noprint
column  pct_used     format 999.9       heading "%|Used" 
column  name         format a19         heading "Tablespace Name" 
column  Kbytes       format 999,999,999 heading "KBytes" 
column  used         format 999,999,999 heading "Used" 
column  free         format 999,999,999 heading "Free" 
column  largest      format 999,999,999 heading "Largest" 
column  max_size     format 999,999,999 heading "MaxPoss|Kbytes"
column  pct_max_used format 999.9       heading "%|Max|Used" 
break   on report 
compute sum of kbytes on report 
compute sum of free   on report 
compute sum of used   on report 
                                                                                                         
select (select decode(extent_management,'LOCAL','*',' ')
          from dba_tablespaces where tablespace_name = b.tablespace_name) ||
nvl(b.tablespace_name,
             nvl(a.tablespace_name,'UNKOWN')) name,
       kbytes_alloc kbytes,
       kbytes_alloc-nvl(kbytes_free,0) used,
       nvl(kbytes_free,0) free,
       ((kbytes_alloc-nvl(kbytes_free,0))/
                          kbytes_alloc)*100 pct_used,
       nvl(largest,0) largest,
       nvl(kbytes_max,kbytes_alloc) Max_Size,
       decode( kbytes_max, 0, 0, (kbytes_alloc/kbytes_max)*100) pct_max_used
from ( select sum(bytes)/1024 Kbytes_free,
              max(bytes)/1024 largest,
              tablespace_name
       from  sys.dba_free_space
       group by tablespace_name ) a,
     ( select sum(bytes)/1024 Kbytes_alloc,
              sum(maxbytes)/1024 Kbytes_max,
              tablespace_name
       from sys.dba_data_files
       group by tablespace_name
       union all
      select sum(bytes)/1024 Kbytes_alloc,
              sum(maxbytes)/1024 Kbytes_max,
              tablespace_name
       from sys.dba_temp_files
       group by tablespace_name )b
where a.tablespace_name (+) = b.tablespace_name
order by &1
/

Which sessions are using TEMP tablespace?

set lines 1000
col killer     for a15
col username   for a15
col osuser     for a15
col spid       for a10
col mb_used    for 99999
col module for a20
col program    for a20
col tablespace for a10
col statements for 999
select s.sid||','||s.serial#                  killer
,      s.username                             username
,      s.osuser                               osuser
,      p.spid                                 spid
,      s.module                               module
,      p.program                              program
,      sum(t.blocks)*tbs.block_size/1024/1024 mb_used
,      t.tablespace                           tablespace
,      count(*)                               statements
from   v$sort_usage    t
,      v$session       s
,      dba_tablespaces tbs
,      v$process       p
where  1=1
and    t.session_addr = s.saddr
and    s.paddr        = p.addr
and    t.tablespace   = tbs.tablespace_name
group  by s.sid
,      s.serial#
,      s.username
,      s.osuser
,      p.spid
,      s.module
,      p.program
,      tbs.block_size
,      t.tablespace
order  by killer
/

What is the currently assigned default temporary tablespace?

See DEFAULT_TEMP_TABLESPACE to see which TEMP table space is defaulted at database level

set lines 200 pages 100 newpa none
col description for a60
col property_value for a35
select *
from database_properties
/

Reduce (or recreate) size of temporary tablespace

Sometimes the TEMP tablespace grows too big - out of all proportion to the size of the database.
Create a temporary temp tablespace

create temporary tablespace tempx tempfile '/oracle/RMANV12/oradata1/temp1.dbf' size 1g autoextend on next 1g maxsize unlimited;

Assign this new temporary temp tablespace to the database

alter database default temporary tablespace tempx;

Check for any sessions still holding on to the TEMP tablespace

select vsu.username
,      vsu.session_num
,      vsu.session_addr
,      vs.sid
from   v$sort_usage vsu
,      v$session    vs
where  1=1
and    vsu.session_num = vs.serial#
/

Kill any sessions still holding on to the TEMP tablespace

alter system disconnect session '&sid,&serial' immediate;

Drop the original temp tablespace

drop tablespace temp including contents and datafiles;

Recreate the original temp tablespace (smaller, or with fewer datafiles)

create temporary tablespace temp tempfile '/oracle/RMANV12/oradata2/temp01.dbf' size 2g autoextend on next 1g maxsize unlimited
                                 ,        '/oracle/RMANV12/oradata2/temp02.dbf' size 2g autoextend on next 1g maxsize unlimited
                                 ,        '/oracle/RMANV12/oradata2/temp03.dbf' size 2g autoextend on next 1g maxsize unlimited
                                 ,        '/oracle/RMANV12/oradata2/temp04.dbf' size 2g autoextend on next 1g maxsize unlimited;

Assign the new temp tablespace to the database

alter database default temporary tablespace temp;

Drop the temporary temp tablespace

drop tablespace tempx including contents and datafiles;

Which tablespaces are encrypted

Encrypt tablespaces to protect data (after having created a wallet)

select tablespace_name, encrypted from dba_tablespaces;

Check encryption algorithm

select t.name
,      e.encryptionalg
,      e.encryptedts
from   v$tablespace t
,      v$encrypted_tablespaces e
where  t.ts# = e.ts#;