Temporary tablespace/OS-Oracle DB/Redo change vector

At minimum, this tablespace should be as large as the
largest index that will be created, plus 10% for
overhead. Can anyone please throw more light on this . Why is this .Is this a hard and fast rule and left to the discretion of the DBA?
This is just a general question.How big of an impact can an operating system have on an oracle database . I mean with respect to everything . Performance/security etc. Unix vs Windows . I do know that on a Unix based system it will be more better to have oracle installed. But isn't there anything that can be done to have the same efffect in every aspect oracle for an database on a windows machine ?
Responses are appreciated!
A redo record consists of
1.redo record header
2.one or more change vectors
What is this change vector.This vwent over my head.Can anyone please elaborate on this.
null
null

Within the limits of the Windows operating system, sure.
Realistically, most organizations use Unix for their large databases because
- when they made the decision about what operating system to use a decade (or more) ago, Windows was nowhere near enterprise ready
- given the human capital they have invested in Unix, there would be no point to moving to Windows
- there are many fewer high-quality Windows admins and Oracle DBAs with substantial Windows skills than Unix admins and Oracle DBAs with Unix experience
There is plenty that can be done to run a large Oracle database on a Windows machine successfully. Unfortunately, doing all these things tends to be harder on Windows, finding people knowledgable enough to do them properly tends to be hard, and relatively few organizations are invested enough in Windows to bother. That's changing over time, though-- there are a lot more Oracle databases on Windows today than there were 5 years ago.
Justin

Similar Messages

Temporary tablespaces in Oracle 10g

Hi,
I have created temporary tablespaces in Oracle 10g from the SQL prompt,but when i list the corresponding datafiles from v$datafile there tempfiles are not listed there,why is it so?
Regards,
Cherry

Hi,
Take a look in
1 - DBA_TEMP_FILES :http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96536/ch2398.htm
2 - V$TEMPFILE: http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96536/ch3225.htm
Cheers,
Marcello M.

Temporary tablespace in oracle 8i

hi,
i am working in oracle 8.1.7.4.0.i am creating a temporary tablespace.
After creating the temp tablespace i am going to assign it as default temporary tablespace.
alter database default temporary tablespace <tbs-name>;
but its showing error...as
ora-02231 - missing or invalid option to alter database,
how to assign the default temporary tablespace in this oracle version.
Rgds...

You can not set the temporary tablespace at the database level as default temporary tablespace in Oracle 8i. From Oracle 9i onwards, you can create and assign the temporary tablespace at the database level.
Only possible way in Oracle 8i is at the user level.
i.e.
SQL> alter user scott default tablespace TEMP;
HTH.
Regards,
Sabdar Syed.

Resizing temporary tablespace in oracle 8i

Please,
I some questions on oracle 8i.
1. how do I know on oracle 8i if the tablespace X is the temporary tablespace?
2. I have someone that increase the size of the temporary tablespace, so I have to decrease it to its normal size, my question is when I do the following command.
alter database tempfile '/u02/oradata/TESTDB/temp01.dbf' resize 250M;
alter database tempfile '/u02/oradata/TESTDB/temp01.dbf' resize 250M
ERROR at line 1:
ORA-03297: file contains used data beyond requested RESIZE value
Does someone show me how to solve this issue?
Thanks

you can use the below sqls
sql>SELECT tablespace_name, extent_size, total_extents, used_extents,
free_extents, max_used_size FROM v$sort_segment;
From the output of the v$sort_segment query:
extent_size      : size of one extent, in number of Oracle blocks
total_extents     : total number of extents in the segment (free or in use)
used_extents      : total number of extents currently in use
free_extents      : total number of extents currently marked as free
max_used_size: maximum number of extents ever needed by an operation (like a sort):
sql> SELECT s.username, u.tablespace, u.contents, u.extents, u.blocks FROM v$session s,
v$sort_usage u WHERE s.saddr=u.session_addr;
SQL> select s.username, s.sid, u.tablespace, u.contents, u.segtype,
round(u.blocks*8192/1024/1024,2) MB
from v$session s, v$sort_usage u
where s.saddr = u.session_addr
and u.contents = 'TEMPORARY'
order by MB DESC ;
reference
### search MetaLink on: resize tempfile
Note 273276.1 How to Shrink the datafile of Temporary Tablespace
Note 274283.1 How to resize Tempfiles if receive an ORA-03297 error Gen RDBMS.
RD-9014 :
Note 132663.1 ORA-03296 Resizing Temporary Locally Managed Tablespace
Note 180578.1 Cannot Resize Tempfiles in Bitmapped Temporary Tablespaces
Note 161103.1 Space For a Tempfile Not Allocated In The Filesystem

Can i change the temporary tablespace for schemas during the transactions??

In My Prod database some of the tablespaces assigned system as Temporary tablespace. I want to change the temporary tablespace for these schemas and the default temporary tablespace of the database.
Can I make this change while the users are accessing the database. Is there any impact If i make this change while the transactions are running.
Below is the change i want to do........
1. Change the users for SYSTEM to TEMP in the temporary tablespace by executing the following SQL
statements:
alter user SYSTEM temporary tablespace TEMP;
alter user SYS temporary tablespace TEMP;
alter user AD_MONITOR temporary tablespace TEMP;
alter use SI_INFORMTN_SCHEMA temporary tablespace TEMP;
alter user EM_MONITOR temporary tablespace TEMP;
alter user ORDPLUGINS temporary tablespace TEMP;
alter user TSMSYS temporary tablespace TEMP;
alter user XDB temporary tablespace TEMP;
alter user SCOTT temporary tablespace TEMP;
alter user DBSNMP temporary tablespace TEMP;
alter user DIP temporary tablespace TEMP;
alter user OUTLN temporary tablespace TEMP;
alter user ANONYMOUS temporary tablespace TEMP;
alter user ORDSYS temporary tablespace TEMP;
alter user MDDATA temporary tablespace TEMP;
2. Set the default temporary tablespace to TEMP by executing the following SQL statement:
alter DATABASE default temporary tablespace TEMP;

user11829256 wrote:
But if one transaction is using the old temporary tablespace and if i change the temporary tablespace of user will that transactions of that user fails which is using the old temp segment....It will continue to use the old one till the end of transaction.
Here a quick test (hopefully readable) :
-- session 1 as a dba user
SQL> grant create session to nga identified by nga;
Grant succeeded.
SQL> alter user nga temporary tablespace tmp;
User altered.
SQL> select temporary_tablespace from dba_users where username='NGA';
TEMPORARY_TABLESPACE
TMP
-- session 2 as NGA
SQL> insert into gtt
2 select * from (select * from all_objects union all select * from all_objects union all select * from all_objects);
80559 rows created.
-- session 1 as a dba user
SQL> select tablespace from v$tempseg_usage where username='NGA';
TABLESPACE
TMP
SQL> alter user nga temporary tablespace pstemp;
User altered.
SQL> select tablespace from v$tempseg_usage where username='NGA';
TABLESPACE
TMP
SQL> select temporary_tablespace from dba_users where username='NGA';
TEMPORARY_TABLESPACE
PSTEMP
-- session 2 as NGA
80559 rows created.
SQL> roll;
Rollback complete.
-- session 1 as a dba user
SQL> select tablespace from v$tempseg_usage where username='NGA';
no rows selected
-- session 2 as NGA
SQL> insert into gtt
2 select * from (select * from all_objects union all select * from all_objects union all select * from all_objects);
80559 rows created.
-- session 1 as a dba user
SQL> select tablespace from v$tempseg_usage where username='NGA';
TABLESPACE
PSTEMPNicolas.

Default temporary tablespace in 8i

Hi
is it possible to change the default temporary tablespace in oracle 8.1.6
SQL> Create temporary tablespace temp1 tempifle '/oradata/temp01' size 2000m;
SQ>alter database default temporary tablespace temp1; this shows invalid option for alter database

As far as I remember, there wasn't a default temporarary tablespace at the database level before 9i.
You need to define it at the user level.
Nicolas.

Temporary tablespace size

Hi,
I have a doubt regarding temporary tablespace. Oracle 9.2.0.5
When I create the default tablespace temp I see it growing and growing during some days until it reaches the maximum size and then it give the error ORA-01652: unable to extend temp segment by 128 in tablespace TEMP
but monitoring the v$sort_segment I see one or 2 users logged and using the temp.
So my doubt is: what I have to do to find the BEST size for my temp tablespace. which queries is the recomended one to see the temp segments being used ?
Thank you

See http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96521/tspaces.htm#9566
To improve the concurrence of multiple sort operations, reduce their overhead, or avoid Oracle space management operations altogether, create temporary tablespaces. A temporary tablespace can be shared by multiple users and can be assigned to users with the CREATE USER statement when you create users in the database.
Within a temporary tablespace, all sort operations for a given instance and tablespace share a single sort segment. Sort segments exist for every instance that performs sort operations within a given tablespace. The sort segment is created by the first statement that uses a temporary tablespace for sorting, after startup, and is released only at shutdown. An extent cannot be shared by multiple transactions.
You can view the allocation and deallocation of space in a temporary tablespace sort segment using the V$SORT_SEGMENT view. The V$TEMPSEG_USAGE view identifies the current sort users in those segments.

Queries about Space Info of Temporary Tablespace

Hi
I want to know the free space, used space, total space of Temporary Tablespace,
and also how much space is currently using by different active sessions of Temporary Tablespace.
Oracle version is 9.2.0.1.0
Can any body send the links or queries regarding this.
Thanks,

This link might help http://www.orafaq.com/faqdba.htm#TEMPSPACE

Change temporary tablespace for session

hi.
i wonder if it's possible to change temporary tablespace for session in the way other then `alter user <user> temporary tablespace <tbc>'?

Hi,
Temporary tablespace is set at database level and user level. It is not set at the session level.
The below is an extract from Oracle Docs for 10gR2
The DEFAULT TEMPORARY TABLESPACE clause of the CREATE DATABASE statement
creates a default temporary tablespace for the database. Oracle Database assigns this
tablespace as the temporary tablespace for users who are not explicitly assigned a
temporary tablespace.
You can explicitly assign a temporary tablespace or tablespace group to a user in the
CREATE USER statement. However, if you do not do so, and if no default temporary
tablespace has been specified for the database, then by default these users are assigned
the SYSTEM tablespace as their temporary tablespace.You can specifically assign a temporary tablespace for the user but not for the session.
regards,
Vijayaraghavan K

Oracle 8.0 - how to identify temporary tablespace using dba v$ views

Hello experts,
can someone tell me how can I query a v$ or dba_ view to identify which are the temporary tablespace in a 8.0.5 Oracle database?
Thx in advance.

8.0 did not have the concept of tempfiles.
However, a Tablespace could be created as a Temporary tablespace (still using "normal" datafiles) with CREATE/ALTER TABLESPACE tablespacename TEMPORAR.
Meaning : You can't query DBA_TEMP_FILES or V$TEMPFILEs. You have to query DBA_USERS to identify the designated Temporary Tablespace(s) and then query DBA_TABLESPACES for the storage parameters and then query DBA_DATA_FILES for the files.
You can also query DBA_TABLESPACES for CONTENTS='TEMPORARY' and then query DBA_DATA_FILES.
Hemant K Chitale

Temporary tablespace Oracle 8i

Hi,
We are having oracle 8i database on windows OS.
Now, the existing TEMP TS in our database is dictionary managed.
So, can i drop the existing TEMP TS and create a new one with locally managed ?
if i create new TEMP TS (locally managed) then, should i keep temp datafiles autoextend ON or OFF ? which is advisable ?
doing so, will it help in improving the performance of the database upto some level ?
With regards

Hi,
I have dropped the exiting TEMP (dictionary managed) TS but getting error when i am trying to create a new one .i.e. locally managed
Storage parameters of existing TEMP TS (dictionary) that i dropped :-
CREATE TABLESPACE TEMP DATAFILE
'D:\ORACLE\ORADATA\EITXIS\TEMP01.DBF' SIZE 8388800K AUTOEXTEND ON NEXT 640K MAXSIZE UNLIMITED,
'D:\ORACLE\ORADATA\EITXIS\TEMP02.DBF' SIZE 500M AUTOEXTEND OFF
MINIMUM EXTENT 64K
LOGGING
DEFAULT STORAGE (
INITIAL 64K
NEXT 64K
MINEXTENTS 1
PCTINCREASE 0
ONLINE
TEMPORARY
EXTENT MANAGEMENT DICTIONARY;
Storage parameters of TEMP TS (locally) that i am trying to create :-
CREATE TEMPORARY TABLESPACE TEMP TEMPFILE
'D:\ORACLE\ORADATA\EITXIS\temp01.dbf' SIZE 1024M AUTOEXTEND ON NEXT 1M,
'D:\ORACLE\ORADATA\EITXIS\temp02.dbf' SIZE 1024M AUTOEXTEND OFF
EXTENT MANAGEMENT LOCAL UNIFORM SIZE 1M;
But when i am trying to create the new TEMP TS (locally managed) i get the below error :-
ORA-03214: File Size specified is smaller than minimum requrired
where i have done mistake ?
Its ok now ...... TEMP TS created with locally managed, but does new storage parameters for TEMP TS (locally), mentioned above are proper now ?
With Regards
Edited by: user640001 on May 11, 2009 1:02 AM

How to check temporary tablespace size in Oracle 7?

Hi,
Anyone still using Oracle 7 ? I would like to know the sql to check the temporary tablespace and its datafile size.
Thank,
Regards,
Eye Gee

http://www.oracle.com/technetwork/documentation/oracle7-091910.html

Force to change temporary tablespace

Hi,
in 9i there is a way to force use different tablespace after 'alter user ... temporary tablespace tempx'?

jgarry wrote:
I believe he is saying the jdbc connection stays there, so sessions continue to use the old temp space.Ahan, since I know nothing about the middleware stuff so obviously, it wouldn't had come to my mind , thanks Joel :-) .
The solution is to break the connection. The polite way would be to notify of a brief system outage. The impolite way would be to shutdown abort. Politics and mid-tier architecture probably would have some influence on the decision.I guess, I shall just say, sounds the right thing to do :-) .
Regards
Aman....

Shrinking a Locally Managed Temporary Tablespace

So, even thoguh the documentation is pretty clear about how to use this feature, I cannot get it to do what I expect it to do for me.
And that would be shrinking the tempfile ;)
Now lets face it, I have a large tempfile and want to resize it without restarting the database:
C:\Users\Administrator>sqlplus / as sysdba
SQL*Plus: Release 11.2.0.2.0 Production on Di Nov 20 05:49:59 2012
Copyright (c) 1982, 2010, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Release 11.2.0.2.0 - 64bit Production
SQL> select file_name
, ceil(bytes / 1024 / 1024) "size MB"
from dba_temp_files
FILE_NAME size MB
R:\MXVC01\TEMP01.DBF 31,231
SQL> select su.username
, ses.sid
, ses.serial#
, su.tablespace
, ceil((su.blocks * dt.block_size) / 1048576) MB
from v$sort_usage su
, dba_tablespaces dt
, v$session ses
where su.tablespace = dt.tablespace_name
and su.session_addr = ses.saddr
USERNAME SID SERIAL# TABLESPACE MB
VPXADMIN 15 15 TEMP 14
VPXADMIN 17 5 TEMP 1,203
VPXADMIN 17 5 TEMP 1
VPXADMIN 18 3 TEMP 7
VPXADMIN 19 3 TEMP 1
VPXADMIN 144 3 TEMP 1
VUMADMIN 156 2597 TEMP 1
7 rows selected.
Or this one:
SQL> select tablespace_size/1024/1024 "tablespace_size mb"
, allocated_space/1024/1024 "allocated_space mb"
, free_space/1024/1024 "free_space mb"
from dba_temp_free_space
tablespace_size mb allocated_space mb free_space mb
31230,9922 1228,99219 30002
Documetation from here: http://docs.oracle.com/cd/E11882_01/server.112/e25494/tspaces007.htm#ADMIN12353
+"Shrinking a Locally Managed Temporary Tablespace+
+Large sort operations performed by the database may result in a temporary tablespace growing and occupying a considerable amount of disk space. After the sort operation completes, the extra space is not released; it is just marked as free and available for reuse. Therefore, a single large sort operation might result in a large amount of allocated temporary space that remains unused after the sort operation is complete. For this reason, the database enables you to shrink locally managed temporary tablespaces and release unused space.+
+You use the SHRINK SPACE clause of the ALTER TABLESPACE statement to shrink a temporary tablespace, or the SHRINK TEMPFILE clause of the ALTER TABLESPACE statement to shrink a specific tempfile of a temporary tablespace. Shrinking frees as much space as possible while maintaining the other attributes of the tablespace or tempfile. The optional KEEP clause defines a minimum size for the tablespace or tempfile.+
+Shrinking is an online operation, which means that user sessions can continue to allocate sort extents if needed, and already-running queries are not affected.+
+The following example shrinks the locally managed temporary tablespace lmtmp1 to a size of 20M.+
+ALTER TABLESPACE lmtemp1 SHRINK SPACE KEEP 20M;+
+The following example shrinks the tempfile lmtemp02.dbf of the locally managed temporary tablespace lmtmp2. Because the KEEP clause is omitted, the database attempts to shrink the tempfile to the minimum possible size.+
+ALTER TABLESPACE lmtemp2 SHRINK TEMPFILE '/u02/oracle/data/lmtemp02.dbf';"+
OK, lets do it:
SQL> alter tablespace temp shrink tempfile 'R:\MXVC01\TEMP01.DBF';
alter tablespace temp shrink tempfile 'R:\MXVC01\TEMP01.DBF'
ERROR at line 1:
ORA-03214: File Size specified is smaller than minimum required
It seems there is a bug? Should I report it, or is it the expected behaviour?
Now lets try this one:
SQL> alter tablespace temp shrink tempfile 'R:\MXVC01\TEMP01.DBF' keep 2048M;
Tablespace altered.
SQL> select file_name
, ceil(bytes / 1024 / 1024) "size MB"
from dba_temp_files
FILE_NAME size MB
R:\MXVC01\TEMP01.DBF 31,231
So .... this lasts about *10 minutes*, and nothing changes?
It seems there is a bug? Should I report it, or is it the expected behaviour?
Could someone enlighten me, what this SHRINK is actually doing?
Is it worth to report this as bug, if not a software bug it is at least a documentation bug because it doesn't mention under which conditions it is working?
P.S.: OMG the posting looks terrible, who's the one to blame for this forum software where it is not possible to use fixed size fonts, or format paragraphs as code, or what about the fact that the forum software is using default SQLPlus output as META for some graphical lines?
Isn't this the forum for Oracle Database users?
Edited by: Gerrit Haase on 20.11.2012 13:44

So, you are kidding with me? No? Who are you?
How can I block users here? Is there a moderator present at this forum?
Maybe you read my initial post again?
I didn't look at the wrong place.
I reported you for general abuse.
SQL> define
DEFINE _DATE           = "20.11.12" (CHAR)
DEFINE CONNECTIDENTIFIER = "MXVC01" (CHAR)
DEFINE _USER           = "SYS" (CHAR)
DEFINE _PRIVILEGE      = "AS SYSDBA" (CHAR)
DEFINE SQLPLUSRELEASE = "1102000200" (CHAR)
DEFINE _EDITOR         = "Notepad" (CHAR)
DEFINE OVERSION = "Oracle Database 11g Release 11.2.0.2.0 - 64bit Production" (CHAR)
DEFINE ORELEASE = "1102000200" (CHAR)
SQL> SELECT * FROM dba_temp_free_space;
TABLESPACE_NAME TABLESPACE_SIZE ALLOCATED_SPACE FREE_SPACE
TEMP 3,2748E+10 1306517504 3,1443E+10
SQL> select TABLESPACE_SIZE/power(2,20), ALLOCATED_SPACE/power(2,20), FREE_SPACE/power(2,20) from dba_temp_free_space ;
TABLESPACE_SIZE/POWER(2,20) ALLOCATED_SPACE/POWER(2,20) FREE_SPACE/POWER(2,20)
31230,9922 1245,99219 29986
SQL> ALTER TABLESPACE temp SHRINK SPACE;
Tablespace altered.
SQL> select TABLESPACE_SIZE/power(2,20), ALLOCATED_SPACE/power(2,20), FREE_SPACE/power(2,20) from dba_temp_free_space ;
TABLESPACE_SIZE/POWER(2,20) ALLOCATED_SPACE/POWER(2,20) FREE_SPACE/POWER(2,20)
31230,9922 1244,99219 *29986*
R:\mxvc01>dir temp
Volume in drive R is Disk_R
Volume Serial Number is 248B-61D4
Directory of R:\mxvc01
20.11.2012 08:09 32.748.077.056 TEMP01.DBF
1 File(s) 32.748.077.056 bytes
0 Dir(s) 8.259.297.280 bytes free
SQL> alter tablespace temp shrink tempfile 'R:\mxvc01\TEMP01.DBF';
alter tablespace temp shrink tempfile 'R:\mxvc01\TEMP01.DBF'
ERROR at line 1:
ORA-03214: File Size specified is smaller than minimum required
*It clearly says that there is 29986 MB Space FREE and the above shrink space changes nothing and so does shrink tempfile:*
SQL> alter tablespace temp shrink tempfile 'R:\mxvc01\TEMP01.DBF';
alter tablespace temp shrink tempfile 'R:\mxvc01\TEMP01.DBF'
ERROR at line 1:
ORA-03214: File Size specified is smaller than minimum required
SQL> alter tablespace temp shrink tempfile 'R:\mxvc01\TEMP01.DBF' KEEP 20M;
Tablespace altered.
R:\mxvc01>dir temp
Volume in drive R is Disk_R
Volume Serial Number is 248B-61D4
Directory of R:\mxvc01
20.11.2012 08:24 32.748.077.056 TEMP01.DBF
1 File(s) 32.748.077.056 bytes
0 Dir(s) 8.259.280.896 bytes free
*... nothing changes, the tempfile isn't smaller now ...*

Temporary tablespace is not being used

hello all,
we have oracle 10g 10.2.1.0 on windows server 2003 platform (32-bit). we have 24*7 database. we have OLTP with heavy transactions. last night we ran a report which is supposed to fetch more than 2500 rows and query include group by and order by clause.
i have rebuild all indexes on index tablespace, which were previously on users tablespace where my all data resides.
but it is taking too much long to generate report more that 40 minutes (expected 5 minutes) my SGA is set to 1.2 GB shared pool sixe is 500M and db_cache_size=400M. and when i check tablespace status from enterprise manager everytime , i see that temporary tablespace is never being used..it always shows that temporary tablespace usages 0.0 and i allocated 4 GB to temp tablespace and it is also default temporary tablespace.
what else i can do to force oracle to use temporary tablespaces??? it is not using for sorting also...thats why it is taking so long to generating report..
any suggestion would be appreciable..
thanks and regards
VD

vikrant dixit wrote:
we have oracle 10g 10.2.1.0 on windows server 2003 platform (32-bit). we have 24*7 database. we have OLTP with heavy transactions. last night we ran a report which is supposed to fetch more than 2500 rows and query include group by and order by clause.
i have rebuild all indexes on index tablespace, which were previously on users tablespace where my all data resides.
but it is taking too much long to generate report more that 40 minutes (expected 5 minutes) Are you saying that you tried rebuilding all your indexes because the report started to run slowly, or conversely that you rebuilt all the indexes and then the report ran slowly ?
If it's just a report that you could simply re-run, then all you have to do is re-run it and watch exactly where the time goes (you've been told about the 10046 trace already).
If it's a report that ran, and was tuned, regularly in the past then you presumably have the execution plan stored somewhere so you could even check the current execution plan compared to the old one to see if it has changed.
Regards
Jonathan Lewis
http://jonathanlewis.wordpress.com
http://www.jlcomp.demon.co.uk
To post code, statspack/AWR report, execution plans or trace files, start and end the section with the tag {noformat}{noformat} (lowercase, curly brackets, no spaces) so that the text appears in fixed format.
"There's no sense in being precise when you don't even know what you're talking about"
John von Neumann

Temporary tablespace/OS-Oracle DB/Redo change vector

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