Releasing TEMP tablespace segments

Hi All
Due to some SQL Queries, the temp tablespace is getting full. I want to release the space in the TEMP tablespace by a command. I know SMON does it (correct me). I have Oracle 9i, and the TEMP tablespace is a local tablespace.
Any help will be appreciated.
Thanks
Bala

temp segment is full may be normal...you need to add some space! well, you can't clean the temp segments when it is used by some running process! smon allocates and deallocates space in temp segment, users doesn't have any control!! how did you define the temp segments...temporary or permanent? and why smon is not doing the cleanup...couple of stack dump of smon would be helpful. you can use any debugger in your system to dump the stack.
Thanks,
G

Similar Messages

Queries are not releasing temp tablespace in 11g standard edition

Queries are not releasing temp tablespace in 11g standard edition

user8928004 wrote:
Hi any one faced one issue.... please help
Patience, Grasshopper
You posted this follow-up a mere two minutes after your previous post.
This forum is not a chat line, and it is not paid support.
Everyone here has a job for which they are paid, and this forum is not it.
No one is responsible for monitoring it and giving a quick response.
Furthermore, it is a global forum. The person with the information you seek may very well live 20 time zones away from you and was going to bed just as you posted. He will not even see your post for several more hours.
Your original post went up in the middle of the night for half the world.
No one with the information you seek is deliberately withholding it until you sound sufficiently desperate.
======================================================
Please present evidence to backup your assertion that "Queries are not releasing temp tablespace"
From the very fine 11g Database Administrator's Guide, at Managing Tablespaces
Space Allocation in a Temporary Tablespace
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.
When a sort operation that uses temporary space completes, allocated extents in the sort segment are not deallocated; they are just marked as free and available for reuse.

Can you tell me why my temp tablespace can not release automatically?

when i up the database, the temp tablespace is used by o,but after some time it is used 99.99%,even all the task are finished,it is still used 99.99%,and can not release automatically!
who can tell me than is why?

Are you receiving an error ?
A "Temporary" tablespace manages it's allocation differently than a normal tablespace. The idea is to avoid the overhead of extent allocation, etc.
Take a look at:
http://asktom.oracle.com/pls/ask/f?p=4950:8:134496932618587661::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:108812348061,
or
http://asktom.oracle.com/pls/ask/f?p=4950:8:134496932618587661::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:1384603628260,
or (these URLs don't seem to be pasting correctly)
go to Ask Tom and search on "temporary" in the "page contains" option in advance search.
Ken

TEMP tablespace is always full in Enterprise Manager

The TEMP tablespace is always (99.99%) full in Enterprise Manager console. How can I release it and check it?

Yes, Kamal did give the answer. owever, it still remains confusing to most people.
The temp tablespace, like all tablespaces, is used to hold SEGMENTS. There are several kinds of temporary segments, including sort segments and segments for global temporary tables.
WHen a segment is allocated, it takes time to find the blocks that are free and to format those blocks.
Oracle's performance measure to counter the cost of finding and formatting free blocks is to leave the segment allocated at that kind of block. When a session terminates, any temprary segments it holds will be released to the free pool of 'that type of temprary segment', and another session can then (as you say) reuse the space.
Still, this is frustrating for the new DBA who has not read the concepts manual and not searched the forum on 'v$sort' or 'temporary tablespace usage'.
http://download-east.oracle.com/docs/cd/B19306_01/server.102/b14220/logical.htm#sthref399

Temp tablespace - why so big?

Temp tablespace (size 6gb) is twice the size of my data and index tablespace combined. I am running into space issues and am wondering is it possible to resize this tablespace and/or take some other action to prevent the temp tablespace getting so relatively large?
Thanks in advance.

The Temporary Tablespace holds only 1 Temporary Segment shared all by all user sessions. Each session takes one or more extents. When a session finishes its operation, it "releases" the extent it used for use by another session but the size of the Segment does NOT shrink.
Therefore, the Segment would grow to the peak concurrent temporary extent usage -- eg at some point in time, if you had 4 very large queries running concurently taking up 8GB then the segment would have grown to 8GB. However, even if you never have such concurrent usage (for example the normal load is for 20 users concurrently taking up 500MB only !), the segment remains at 8GB.
In some environments, the Temporary tablespace could grow during periodic (say Monthly Reporting) batch jobs after which it is dropped and recreated again.
This segment is used not just for "SORT" operations. It is also used for HASH JOIN overflows to disk and also for SORT MERGE operations.
You can monitor the size of the segment in V$SORT_SEGMENT. You can monitor users currently using it in V$SORT_USAGE or V$TEMPSEG_USAGE.
Hemant K Chitale
http://hemantoracledba.blogpsot.com

TEMP tablespace fills up quickly

Hi All,
I know this is a very classic question.
In my client, we run annual reports during 1-2 days a year and the TEMP tablespace gets filled up very quickly.
What is the best practice of managing the TEMP tablespace size in a very busy database. (Oracle Applications is running)
Thanks,
Sinan Topuz

A temporary tablespace contains transient data that persists only for the duration of the session. Temporary tablespaces can improve the concurrency of multiple sort operations, reduce their overhead, and avoid Oracle Database space management operations. A temporary tablespace can be assigned to users with the CREATE USER or ALTER USER statement and can be shared by multiple users.
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.
You cannot explicitly create objects in a temporary tablespace.
Please note all this point.

Should I increase TEMP tablespace size here ?

Version: 10.2.0.4
Platform : RHEL 5.8
Currently we are running a batch job in a schema. The default temporary tablespace for that schema is TEMP.
But I see that the tablespace is full.
SQL> select file_name, bytes/1024/1024/1024 gb from dba_temp_files where tablespace_name = 'TEMP';
FILE_NAME                                                                 GB
/prd/fdms/oradata_db18/fdmsc1sdb/oradata/ts_temp/temp01.dbf               10
SQL> SELECT     TABLESPACE_NAME, FILE_ID,
        BYTES_USED/1024/1024,
        bytes_free/1024/1024
FROM V$TEMP_SPACE_HEADER where tablespace_name = 'TEMP' 2    3    4 ;
TABLESPACE_NAME                             FILE_ID BYTES_USED/1024/1024 BYTES_FREE/1024/1024
TEMP                                              1                10240
So, far the application users have not complained and I didn't see any 'unable to extend' error in the alert log yet, but the above scenario is dangerous. Right? I mean SQL statements with sorting can error out. Right ? Unlike UNDO, with temp tablespace, temp segments cannot be reused. Right ?

Hello,
As said previously, the Sort Segments can be reused, the Views V$SORT_SEGMENT and V$TEMPSEG_USAGE are relevant to monitore the usage of the Temporary Tablespace.
You'll find in the Note below a way to control over time the Temporary Tablespace:
How Can Temporary Segment Usage Be Monitored Over Time? [ID 364417.1]
More over, you may also check for any ORA-01652 in the Alert Log.
But don't worry to much to get a Full Temporary Tablespace, here "Full" doesn't mean "unreusable".
Hope this help.
Best Regards,
Jean-Valentin Lubiez

9i on Linux. Problems with Temp tablespace cleanup

I am currently running Oracle 9i Enterprise on SUSE Linux 7.2.
I am executing queries against the new XMLType datatype and every query adds to the Temp tablespace, which doesn't get cleaned up. Eventually, the tablespace will run out of space and Oracle will issue and error:
ORA-01652: unable to extend temp segment by 128 in tablespace <name>
The only way to clean up the Temp tablespace seems to be by restarting the server.
Is that happening on other platforms as well? I would appreciate any help.

Hi
You can connect to the database as DBA (Sys or System) and make a bigger temporal tablespace. Or create a new bigger temporary tablespace and assign it to the user.
A10!
PS: Temporary tablespace is used when no memory available for the session, for example when a big ORDER BY is done. Try to increase the memory assigned, just look at initXXX.ora (sort_size)

Oracle 9i TEMP tablespace backup problem using RMAN!

Oracle8/8i whole backup is ok for our backup software(using RMAN without RC database), but for Oracle 9i, I get following error messages when backing up temp tablespace.
1. RMAN-20202: tablespace not found in the recovery catalog
2. RMAN-06019: could not translate tablespace name "TEMP"
I check some views of Oracle9i, and know some changes happen for temp tablespace in 9i, but how to deal with this problem. Any idea, please!

In 9i RMAN does not restore temporary datafiles. Instead, you should create them after your restore. I believe that Oracle is going to make a change to this in the next release of 9i and have RMAN create the temporary files. You can view the temporary datafiles @ v$tempfile.
I believe RMAN doesn't restore temporary files because they are locally managed and not in the control files. RMAN reads the controlfile of the target database to obtain info about backups, datafiles, etc.
Hope this helps.

To shrink the size of TEMP tablespace

Dear all,
There is a databse with RAC, now in OEM the size of TEMP tablespace has been reached at 99.9%. now we want to shrink the size of TEMP tablespace.
how to we do that???????
plz help me...........

Temporary tablespaces usually show they are full, however this space is not actually in use. It is rather allocated. Oracle has evaluated the best way to obtain the most of performance, and he said it is better to allocate once than allocate-deallocate-reallocate extents, so temporary space is not 'released'.
If you want to feel psychologically more confortable with lower allocated space, you can drop your tablespace (create an interim default temporary tablespace first) and recreate it.
You can also rebuild temporary datafiles:
alter tablespace temp add tempfile 'C:\ORACLE\ORACLEXE\ORADATA\XE\TEMP01.dbf' size 32m;
SQL> select name from v$tempfile;
NAME
C:\ORACLE\ORACLEXE\ORADATA\XE\TEMP.DBF
C:\ORACLE\ORACLEXE\ORADATA\XE\TEMP01.DBF
SQL> alter database tempfile 'C:\ORACLE\ORACLEXE\ORADATA\XE\TEMP01.DBF' drop including datafiles;
Database altered.

Temp tablespace issue

Hi,
We are facing continuous problem of slow performance in some applications...i found that temp tablespace is becoming full frequently...so after that reports are getting delayed..is there any permanent fix for this problem..
We have recreated the temp tablespace...
Regards,
Joshua

Hi,
pls find the details...
VERSION:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
PL/SQL Release 10.2.0.4.0 - Production
CORE 10.2.0.4.0 Production
TNS for Linux: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production
some info abt temp tablespace:
TABLESPACE_NAME BYTES_COALESCED EXTENTS_COALESCED PERCENT_EXTENTS_COALESCED BLOCKS_COALESCED PERCENT_BLOCKS_COALESCED
TEMP_SCHEMA_USR 50724864 2 100 6192 100
is that means coalescing would solve the problem ?...
We have some limitation that we cant control the users since they are very critical in operation...
Is Adding datafile will solve the problem(bcoz b4 sometime i added one file....no improvement)...

Informatica Workflow fails because of TEMP tablespace

Hi,
I am trying to do a Complete Oracle 11.5.10 load. However my execution plan fails because the SDE_ORA_Payroll_Fact fails. The error in the session log is as follows:
READER_1_1_1> RR_4035 SQL Error [
ORA-01652: unable to extend temp segment by 128 in tablespace TEMP
From the error message it is very clear that the Source Qualifier is unable to select the data from the source tables. i have increased the TEMP tablespace too however I keep getting the error. Because of this error my other mappings are also Stopped. Any solutions to this problem?

Hi,
Would you not want to use the following parameters to say load one fiscal year at a time?
Analysis Start Date
The start date used to build the day dimension and to flatten exchange rates and costs lists.
$$ANALYSIS_START, $$ANALYSIS_START_WID
Default : Jan 1, 1980
Analysis End Date
The end date used to build the day dimension and to flatten exchange rates and costs lists.
$$ANALYSIS_END, $$ANALYSIS_END_WID
Default : Dec 31, 2010
Thanks,
Chris

Temp Tablespace Goes Berzerk using XMLGEN

The following procedure seems to maxout my temporary tablespace (2G!!!!)
I use this procedure to pump XML to a client given a sql statement and a few parameters.
I am using the plxmlparser_v1_0_2 release and the XSU12_ver1_2_1 release.
There seems to be some discussion concerning this in other threads but no soloution seems to be forth coming. Any advice?
PS I am also having a problem with XMLGEN returning XML datasets >90k. Methinks the two issues are related.
Regards
James Crockart
[email protected]
procedure createDynamicXML(
sql_string varchar2,
result_name varchar2 default 'results',
row_name varchar2 default 'row',
error_name varchar2 default 'error_results',
rowid_name varchar2 default null,
rowid_col varchar2 default null,
useLowerCase boolean default true,
useNullAttrib boolean default false)
is
no_sql exception;
--XML Variables
xmlString CLOB := null;
amount integer:= 255;
position integer := 1;
charString varchar2(255);
begin
if sql_string is null then
raise no_sql;
end if;
--Set XML preferences
xmlgen.resetOptions;
xmlgen.setErrorTag(error_name);
xmlgen.setRowsetTag(result_name);
xmlgen.setRowTag(row_name);
if rowid_name is not null then
xmlgen.setRowIdAttrName(rowid_name);
end if;
if rowid_col is not null then
xmlgen.setRowIdColumn(rowid_col);
end if;
if useLowerCase then
xmlgen.useLowerCaseTagNames();
end if;
xmlgen.useNullAttributeIndicator(useNullAttrib);
--Set mime header
--owa_util.mime_header('text/xml');
--Generate XML
xmlString := xmlgen.getXML(sql_string);
--Output XML
dbms_lob.open(xmlString,DBMS_LOB.LOB_READONLY);
loop
dbms_lob.read(xmlString,amount,position,charString);
htp.prn(charString);
position := position + amount;
end loop;
dbms_lob.close(xmlString);
dbms_lob.freetemporary(xmlString);
exception
when no_data_found then
dbms_lob.close(xmlString);
dbms_lob.freetemporary(xmlString);
end createDynamicXML;
null

The user the xml sdk was installed in and its privs is:
CREATE USER "XML" PROFILE "DEFAULT"
DEFAULT TABLESPACE "USERS"
TEMPORARY TABLESPACE "TEMP"
ACCOUNT UNLOCK;
grant connect to XML;
grant resource to XML;
grant javauserpriv to XML;
grant javasyspriv to XML;
I suppose I can give the XML user it's own temp tablespace to save the rest of the production environment from going down.
But does not solve the problem :(
-James
null

Relation between temp tablespace and index creation

Hi,
I have my Oracle database (11gR1) on windows 2008 server R1 64 bit..
This is my development database. i have one table which has more than 2 billion rows , the problem i m facing here is while creating the index on this table i m getting temp segment error , while my temp tablespace size is 32 gb.
Here my doubt is :
1.What will happen in temp tablespace when index is created ? Relation between temp and index creation ?
2. how to create the index on a huge table?
3. What is the meaning og logging and no logging in INDEX creation .
4. how can we over come for these kind of problem and manage the temp TS..
Thanks & Regards,
Vikash Chauradia

add another tempfile?
1.What will happen in temp tablespace when index is created ? Relation between temp and index creation ?
index creation needs sort. how much depends on the size of the index.
2. how to create the index on a huge table?
create an interim (temporary? :)) huge temporary space for the very purpose.
http://docs.oracle.com/cd/B28359_01/server.111/b28310/indexes003.htm#i1006643
3. What is the meaning og logging and no logging in INDEX creation .
nologging means you the creation isnt in the logs so if you need to recover you cant get back to it. when using nologging in a prod env you might do it for performance during a period of heavy dml such as a large index creation and then backup afterwards. common enough.
4. how can we over come for these kind of problem and manage the temp TS..
current tempspace size =X
is X big enough? if yes, cup of tea, if no, make X bigger.
It doesnt matter what X is.

ORA-01652 in TEMP Tablespace

Hi,
We have the following errors:
RMAN> crosscheck archivelog all;
starting full resync of recovery catalog
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of crosscheck command at 01/07/2009 14:26:10
RMAN-03014: implicit resync of recovery catalog failed
RMAN-03009: failure of full resync command on default channel at 01/07/2009 14:26:10
ORA-01652: unable to extend temp segment by in tablespace
RMAN>
We have tried to increase the size of the TEMP tablespace, but this operation keeps using up the entire temp tablespace. It's the temp tablespace in the target database that is filling up.
We cannot keep increasing the size of the TEMP ts to fill the disk.
We have also tried to create a new repository but this had the same outcome.
I reckon there is something in the database tables, as one of our backups used the target control file as its repository. Should I remove the entries from these tables in the target tablespace to make the repository think there is no re-synching to be done?
Regards,
Tim.

If you are sure that it is on the target DB what you can do is enable a trace for the event to see what triggers this error
it doesnt have to be on temporary table because there are temp segments on normal tables used for index creation type operations as well so you need to find the problem before assuming it is temp tablespace error
alter system set events '1652 trace name errorstack level 1';
to turn off
alter system set events '1652 trace name context off';
If you cant find anything from trace then you can send the trace output here maybe somebody can catch something.
Coskan Gundogar
http://coskan.wordpress.com
Edited by: coskan on Mar 30, 2009 4:28 PM

Releasing TEMP tablespace segments

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