Shrink system tablespace, or any laternate to reduce disk space usage!

Dear All,
My Database is 11gR1 and Linux is the operating system.
My System tablespace is consuming 24,000 MB disk space, The user i have created that contain all the objects is another tablespace.
I just want to know is there any way to shrink system tablespace or anything else that can be done to reduce its size?
Plus what are the directories from where we can delete logs and other files that do not affect the running of database. My disk space is 99% full and i have to delete files.
Regards, Imran

misterimran wrote:
Dear All,
My Database is 11gR1 and Linux is the operating system.
My System tablespace is consuming 24,000 MB disk space, The user i have created that contain all the objects is another tablespace.
I just want to know is there any way to shrink system tablespace or anything else that can be done to reduce its size?
Plus what are the directories from where we can delete logs and other files that do not affect the running of database. My disk space is 99% full and i have to delete files.
Regards, ImranFirst, do this:
sql> select distinct owner from dba_segments where tablespace_name = 'SYSTEM';Make sure the only objects in the SYSTEM ts are owned by legit users of that ts - SYS, SYSTEM, and OUTLN
As for log files .. look at your listener log. look at your alert log. look at any trace files in adump, bdump and udump that are old enough you don't want them any more.

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* Solaris
* Oracle 9.2.0.4.0
* Locally managed database (since SYSTEM is locally managed TS)
I have a Oracle 9i database with is around 7 months old. Over the 7 months it had around 400 schemas at most and SYSTEM tablespace was increased to 850MB. Now it only has around 120 schemas and size of the SYSTEM tablespace still 850MB and its 99% used.
How can I get more free space on system tablespace?
* I have made sure that non-sys(tem) user dont have objects on SYSTEM tablespace.
* I understand that dropping schema does not give you all the space back, since objects are store as row in System tables etc.
Increasing disk is not an option for me. Any tips to free space on system welcome.
Thanks,
Nazrul Islam

Thanks Joel Pérez for trying to help.
SQL> select segment_name, owner from
dba_segments
where owner not in
('SYS','SYSTEM','OUTLN','MDSYS','ORDSYS','WMSYS')
and
TABLESPACE_NAME='SYSTEM';
SEGMENT_NAME                   OWNER
TOAD_PLAN_SQL                  TOAD
TOAD_PLAN_TABLE                TOAD
PLSQL_PROFILER_RUNS            TOAD
PLSQL_PROFILER_UNITS           TOAD
PLSQL_PROFILER_DATA            TOAD
TPSQL_IDX                      TOAD
TPTBL_IDX                      TOAD
SYS_C006895561                 TOAD
SYS_C006895563                 TOAD
SYS_C006895566                 TOAD
10 rows selected.
SQL> select owner from dba_segments where
tablespace_name='SYSTEM'
group by owner;
OWNER
OUTLN
SYS
SYSTEM
TOAD
WMSYSHere is my query (to show TOAD is taking very little
space):r.- That is true, the space used by TOAD is little
>
SQL> select owner, SUM(bytes)/1048576 AS "TOTAL
(MB)"
from dba_segments
where tablespace_name = 'SYSTEM'
group by owner order by "TOTAL (MB)" desc;
OWNER                 TOTAL (MB)
SYS                     820.4375
SYSTEM                      20.5
WMSYS                     3.6875
TOAD                       .6875
OUTLN                       .375Looks like, I have to grow system. Or since I have a
fixed number of schema now, I think I will have to
recreate a DB to reduce SYSTEM size.
Joel one other info that might explain why
this happening. Part of our build process is to drop
4 schemas and roles and recreate them.
e.g.
drop user nislam cascade;
create user nislam ....And we do many builds a day. Maybe Oracle uses more
space in doing that since new userid, better might be
drop objects from the schema. WHAT do you
say?
r.- In theorical lines. Both must give the same results but... I would recommend you to carry out some intensive test about it in a test enviroment testing both methods to monitor the behavior of the growth of the tablespace system. As you said, perhaps dropping the user objects will get better results.
>
Regards,
Nazrul IslamJoel Pérez
http://otn.oracle.com/experts

How to shrink a tablespace;;;Plz Help Me

Hello,
I have droped 2 big tables (more than 20 millions of records each one) and eventually many indexes in reference.
In my Database server I don't have enougth space, I have only 5Go.
I have to free disk space now by shrinking the size of Index and Data Tablespace.
I used theses scripts to analyse my object plecement repartiton on both tablespaces : INDEX and DATA.
1- select file_id, block_id, blocks,
owner||'.'||segment_name "Name"
from sys.dba_extents
where tablespace_name = 'INDX'
UNION
select file_id, block_id, blocks,
'Free'
from sys.dba_free_space
where tablespace_name = 'INDX'
order by 1,2,3
2- select file_id, block_id, blocks,
owner||'.'||segment_name "Name"
from sys.dba_extents
where tablespace_name = 'DATA'
UNION
select file_id, block_id, blocks,
'Free'
from sys.dba_free_space
where tablespace_name = 'DATA'
order by 1,2,3
After executing these scripts, I find many free extends in the middle and the command :
ALTER DATABASE DATAFILE ... RESIZE is failed
Any idea How to resize / reduce my tablespaces ?
My database version 's :
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 On Linux Sever.
Thanks a lot
Message was edited by:
OracleJavaLinux

hi
do one thing create new tablespace like TEST move table by table to that and viseversa
ie u have emp,dept ... etc tables move emp to ne tablespace and then move back to its original tablespace
for ex:emp,dept... belongs to APPS_TS_TX_DATA
alter table emp move tablespace TEST;
alter table emp move tablespace APPS_TS_TX_DATA;
after this rebuild all indexes on that tables
alter index <index_name> rebuild;
By this action u can recover unused space by the tables
Message was edited by:
BhanuChander

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this is my Oracle version:
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Thanks Virag for ur suggestions.
I have tried to do this:
SQL> VARIABLE total_blocks NUMBER
SQL> VARIABLE total_bytes NUMBER
SQL> VARIABLE unused_blocks NUMBER
SQL> VARIABLE unused_bytes NUMBER
SQL> VARIABLE lastextf NUMBER
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SQL> VARIABLE lastusedblock NUMBER
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:total_bytes,:unused_blocks, :unused_bytes, :lastextf, -
:last_extb, :lastusedblock);and got a result.
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Mine is a Oracle 10g 10.2 on windows.
I am importing a export file into a user ,It takes some amount of space in SYSTEM and another tablespace .When I drop the user space in system tablespace is not coming back. ANY IDEA WHY
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SQL> select sum(bytes)/1024/1024 from dba_segments where owner='SYSTEM';
SUM(BYTES)/1024/1024
22.1875
SQL> select sum(bytes)/1024/1024 from dba_segments where owner='SYS';
SUM(BYTES)/1024/1024
544.1875
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SUM(BYTES)/1024/1024
41
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imp system file=filename.dmp log=logname.log fromuser=<username> touser=<username> statistics=none
AFTER IMPORT
SQL> select sum(bytes)/1024/1024 from dba_segments where segment_name='SOURCE$';
SUM(BYTES)/1024/1024
53
SQL> select sum(bytes)/1024/1024 from dba_segments where owner='SYSTEM';
SUM(BYTES)/1024/1024
22.1875
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SQL> select sum(bytes)/1024/1024 from dba_segments where owner='SYS';
SUM(BYTES)/1024/1024
728.375
SQL> select sum(bytes)/1024/1024 from dba_segments where owner='SYSTEM';
SUM(BYTES)/1024/1024
22.1875
SQL> select sum(bytes)/1024/1024 from dba_segments where segment_name='SOURCE$';
SUM(BYTES)/1024/1024
53
I even tried deleting the objects first and then dropping the user
SQL> delete from source$ where obj# in(select object_id from dba_objects where owner='USERNAME');
211252 rows deleted.
SQL> commit;
Commit complete.
SQL> drop user USERNAME cascade;
User dropped.
The space used by the schema on system tablespace is not coming back.

Hi user509593!
Adding objects to a tablespace requires space in that tablespace. This space is managed in segments and extents. If an extent is fully used (that means 100 % usage) a new extent will be added to a segment. Oracle uses a mechanism called "High Water Mark" to mark the last used extent.
Your problem is that oracle don't set this High Water Mark back if you are dropping objects from a tablespace. Once an extent is marked as it it retains marked as used.
Before Adding Objects:
u = used Extent
x = free Extent
| = High Water Mark
uuuuuuxxxxx
...........|
After Adding Objects:
uuuuuuuxxxx
............|
After dropping objects:
uuuuuuuxxxx
............|
The only chance to get your "unused" space back is to reorganized your tablespace. But before you reorganize something please read the documentation to know all about the costs and traps that comes with reorganization.
Hope this help!
null

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blocks
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ARCH      CONNECTED             0          0          0          0
ARCH      CONNECTED             0          0          0          0
ARCH      CONNECTED             0          0          0          0
ARCH      CONNECTED             0          0          0          0
ARCH      CONNECTED             0          0          0          0
ARCH      CONNECTED             0          0          0          0
RFS       IDLE                  0          0          0          0
RFS       IDLE                  1     145418        121          1
RFS       IDLE                  0          0          0          0
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RFS       IDLE                  0          0          0          0
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         1     145411 NO
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         1     145414 NO
         1     145415 NO
         2     154362 NO
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validation succeeded for archived log
archived log file name=+RECO_XORA/nmuasb00/archivelog/2013_11_26/thread_2_seq_154378.346.832521991 RECID=31 STAMP=832521993
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Shrink system tablespace, or any laternate to reduce disk space usage!

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