Temp tablespace usage...
hi,,
how to check the usage of temp tablespace?
thanks,
bicho
Temp used:
SELECT A.tablespace_name tablespace, D.mb_total,
SUM (A.used_blocks * D.block_size) / 1024 / 1024 mb_used,
D.mb_total - SUM (A.used_blocks * D.block_size) / 1024 / 1024 mb_free
FROM v$sort_segment A,
SELECT B.name, C.block_size, SUM (C.bytes) / 1024 / 1024 mb_total
FROM v$tablespace B, v$tempfile C
WHERE B.ts#= C.ts#
GROUP BY B.name, C.block_size
) D
WHERE A.tablespace_name = D.name
GROUP by A.tablespace_name, D.mb_total;
Temp usage per session:
SELECT S.sid || ‘,’ || S.serial# sid_serial, S.username, S.osuser, P.spid, S.module,
P.program, SUM (T.blocks) * TBS.block_size / 1024 / 1024 mb_used, T.tablespace,
COUNT(*) statements
FROM v$sort_usage T, v$session S, dba_tablespaces TBS, v$process P
WHERE 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 sid_serial;
Thanks
Similar Messages
-
Check and identify cause of previous temp tablespace usage
Hi
Our production ERP database is on solaris and on version 9.2.0.8.0. The application tier and database tier are on two separate nodes.
Recently we observed that the temporary tablespace is being consumed more on a particular day. While monitoring the database,we observed the free temp tablespace was less and hence added 10gb space to it. However within 5-6 hours this space was utilised and certain requests/jobs failed due to no space in temp. This happened on 04th December 2012. Though the situation returned to normal post that,we need to find the cause of consumption of temporary tablespace in such large volumes. We are on 9i database and hence tried identifying the queries through statspack report as no views in particular exist for 9i.
We came across many queries which would help us identfy the current temp usage,but in 9i,we didnot find anything which would guide us on the historic temp tablespace usage. Can it be found via statspack? If yes,what exactly to check for in it? Request you to all please advice. Thanks.
Regards
Rdxdba-- To get historic information for a spesific sid,serial
column temp_mb format 99999999
column sample_time format a25
prompt
prompt DBA_HIST_ACTIVE_SESS_HISTORY
prompt
select sample_time,session_id,session_serial#,sql_id,temp_space_allocated/1024/1024 temp_mb,
temp_space_allocated/1024/1024-lag(temp_space_allocated/1024/1024,1,0) over (order by sample_time) as temp_diff
from dba_hist_active_sess_history
--from v$active_session_history
where
session_id=&1
and session_serial#=&2
order by sample_time asc
prompt
prompt ACTIVE_SESS_HIST
prompt
select sample_time,session_id,session_serial#,sql_id,temp_space_allocated/1024/1024 temp_mb,
temp_space_allocated/1024/1024-lag(temp_space_allocated/1024/1024,1,0) over (order by sample_time) as temp_diff
--from dba_hist_active_sess_history
from v$active_session_history
where
session_id=&1
and session_serial#=&2
order by sample_time asc
=========================================================================
---- For global temp usage info
col sid_serial format a10
col username format a17
col osuser format a15
col spid format 99999
col module format a15
col program format a30
col mb_used format 999999.999
col mb_total format 999999.999
col tablespace format a15
col statements format 999
col hash_value format 99999999999
col sql_text format a50
col service_name format a15
prompt
prompt #####################################################################
prompt #######################LOCAL TEMP USAGE#############################
prompt #####################################################################
prompt
SELECT A.tablespace_name tablespace, D.mb_total,
SUM (A.used_blocks * D.block_size) / 1024 / 1024 mb_used,
D.mb_total - SUM (A.used_blocks * D.block_size) / 1024 / 1024 mb_free
FROM v$sort_segment A,
SELECT B.name, C.block_size, SUM (C.bytes) / 1024 / 1024 mb_total
FROM v$tablespace B, v$tempfile C
WHERE B.ts#= C.ts#
GROUP BY B.name, C.block_size
) D
WHERE A.tablespace_name = D.name
GROUP by A.tablespace_name, D.mb_total;
prompt
prompt #####################################################################
prompt #######################LOCAL TEMP USERS#############################
prompt #####################################################################
prompt
SELECT S.sid || ',' || S.serial# sid_serial, S.username, S.osuser, P.spid,
--S.module,
--P.program,
s.service_name,
SUM (T.blocks) * TBS.block_size / 1024 / 1024 mb_used, T.tablespace,
COUNT(*) statements
FROM v$tempseg_usage T, v$session S, dba_tablespaces TBS, v$process P
WHERE 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,
s.service_name,TBS.block_size, T.tablespace
ORDER BY mb_used;
--prompt
--prompt #####################################################################
--prompt #######################LOCAL ACTIVE SQLS ############################
--prompt #####################################################################
--prompt
-- SELECT sysdate "TIME_STAMP", vsu.username, vs.sid, vp.spid, vs.sql_id, vst.sql_text,vsu.segtype, vsu.tablespace,vs.service_name,
-- sum_blocks*dt.block_size/1024/1024 usage_mb
-- FROM
-- SELECT username, sqladdr, sqlhash, sql_id, tablespace, segtype,session_addr,
-- sum(blocks) sum_blocks
-- FROM v$tempseg_usage
-- group by username, sqladdr, sqlhash, sql_id, tablespace, segtype,session_addr
-- ) "VSU",
-- v$sqltext vst,
-- v$session vs,
-- v$process vp,
-- dba_tablespaces dt
-- WHERE vs.sql_id = vst.sql_id
-- AND vsu.session_addr = vs.saddr
-- AND vs.paddr = vp.addr
-- AND vst.piece = 0
-- AND vs.status='ACTIVE'
-- AND dt.tablespace_name = vsu.tablespace
-- order by usage_mb;
--prompt
--prompt #####################################################################
--prompt #######################LOCAL TEMP SQLS##############################
--prompt #####################################################################
--prompt
--SELECT S.sid || ',' || S.serial# sid_serial, S.username, Q.sql_id, Q.sql_text,
--T.blocks * TBS.block_size / 1024 / 1024 mb_used, T.tablespace
--FROM v$tempseg_usage T, v$session S, v$sqlarea Q, dba_tablespaces TBS
--WHERE T.session_addr = S.saddr
--AND T.sqladdr = Q.address
--AND T.tablespace = TBS.tablespace_name
--ORDER BY mb_used;
-- -
Temp tablespace usage coming in Negative values
Hi,
We got the error in our alert.log stating "unable to extend temp segment by 128 in tablespace"
TABLESPACE_NAME FILE_ID BYTES_USED/1024/1024 BYTES_FREE/1024/1024
TEMP1 2 622 878
TEMP1 3 -4826 5326
TEMP1 1 414 2586
TABLESPACE SIZE MB USED MB FREE MB % USED % FREE
TEMP1 4997 -3793 8790 -75.9 % 175.9 %
If we see the above we can see tempusage is showing in negativevalues.
is that a Bug in Oracle 10g.
Please advice
CheersAccording to the following Oracle support note you should drop and re-create your temp file:
V$Temp_space_header.Bytes_used=-133112528896 [ID 467435.1]
HTH -- Mark D Powell -- -
Temporary tablespace usage is always 0%
Friends,
I have this strange issue. My Oracle 9iR2 database always show temp tablespace usage as 0% no matter how much sorting is going on, it is never used.
select status from dba_temp_files;
=> AVAILABLE
select tablespace_name, status from dba_tablespaces where contents = 'TEMPORARY';
=> TEMP1, ONLINE
All users have TEMP1 as temporary tablespace.
I ran this random query to analyze temp usage.
SELECT * FROM DBA_EXTENTS ORDER BY 1,4,2,3,7,8;
I am using this query to analyze temp usage
http://www.oracle.com/technology/oramag/code/tips2004/110104.html
[re]
SELECT s.sid "SID",s.username "User",s.program "Program", u.tablespace "Tablespace",
u.contents "Contents", u.extents "Extents", u.blocks*8/1024 "Used Space in MB", q.sql_text "SQL TEXT",
a.object "Object", k.bytes/1024/1024 "Temp File Size"
FROM v$session s, v$sort_usage u, v$access a, dba_temp_files k, v$sql q
WHERE s.saddr=u.session_addr
and s.sql_address=q.address
and s.sid=a.sid
and u.tablespace=k.tablespace_name;
Any idea what going on here.
Regards,
Vishal V.Hi,
===To find out the who is using the temp space===
SELECT b.tablespace, b.segfile#, b.segblk#, b.blocks, a.sid, a.serial#,
a.username, a.osuser, a.status
FROM v$session a,v$sort_usage b
WHERE a.saddr = b.session_addr
ORDER BY b.tablespace , b.segfile#, b.segblk#, b.blocks;
===== to find out the free space in temp space ===
SQL> select tablespace_name, file_id, bytes_used, bytes_free
2 from v$temp_space_header ; -
How to monitor temp tablespace
I server in 11gR2 and 10gR2.
Is there a way to monitor its usage, like, who is using it, how much space a session is using, what are the objects crated, ie. temp tables.
Thanks.Hi
This might helpful
select TABLESPACE_NAME, BYTES_USED, BYTES_FREE from V$TEMP_SPACE_HEADER;Also checkout the below link.
http://blog.flimatech.com/2010/06/15/how-to-monitor-temp-tablespace-usage/
Cheers
Kanchana -
How to find the sessions/user consuming more temp tablespace
Environment details
IBM-AIX 64 bit
Oracle 10.2.0.4.0
Recently we encountered the issue of sudden peak in CPU utilization and temp tablespace usage. We are noticing this issue after Apr CPU 2009 patch and upgrade to 10.2.0.4.
Recently temp space was full and we added 18 GB of space to temp tablespace, within few hours, they are also consumed.
Application team is telling that they did not modify any code. ADDM report suggests most of the recommendations related to SQL tuning only
not sure about the real issue. Can somebody tell me how I can find what are all sessions/user consuming high temp tablespace
Edited by: user1368801 on Sep 1, 2009 5:32 PMHi,
Run below query to check if it is used by any session.
select sum(a.BYTES_USED)/1024/1024 used_mb, sum(b.bytes)/1024/1024 total_mb,
sum(a.BYTES_USED)/sum(b.bytes)*100 pct_used
from V$TEMP_EXTENT_POOL a, v$tempfile b
where a.file_id(+) = b.file#
Check who is using it by the below query.
SELECT s.sid,s.serial#,osuser,process,program,s.sql_hash_value,u.extents, u.blocks
FROM v\$session s, v\$sort_usage u
WHERE s.saddr = u.session_addr order by extents,blocks desc
Hope this solves your issue.
Regards
Regards,
Satishbabu Gunukula
Click here to improve RMAN backup Performance using [Block change tracking in Oracle 10g|http://oracleracexpert.blogspot.com/2009/09/block-change-tracking-in-oracle-10g.html]
http://oracleracexpert.blogspot.com -
Reasons to use separate temp tablespace for user tablespace
Hi,
I know that guideline says is not use system tablespace for user tables. But need i create for user tablespace separate TEMP teblespace or i can use same TEMP tablespace for all tablespaces?Hi,
>>But need i create for user tablespace separate TEMP tablespace or i can use same TEMP tablespace for all tablespaces?
You can use one temp tablespace for a database , Temp tablespace usage are for sorting the data.
for more detail you can go with :Creating Tablespaces
HTH -
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$TEMPSEG_USAGE are relevant to monitore the usage of the Temporary Tablespace.
You'll find in the Note below a way to control over time the Temporary Tablespace:
How Can Temporary Segment Usage Be Monitored Over Time? [ID 364417.1]
More over, you may also check for any ORA-01652 in the Alert Log.
But don't worry to much to get a Full Temporary Tablespace, here "Full" doesn't mean "unreusable".
Hope this help.
Best Regards,
Jean-Valentin Lubiez -
TEMP tablespace is always full in Enterprise Manager
The TEMP tablespace is always (99.99%) full in Enterprise Manager console. How can I release it and check it?
Yes, Kamal did give the answer. owever, it still remains confusing to most people.
The temp tablespace, like all tablespaces, is used to hold SEGMENTS. There are several kinds of temporary segments, including sort segments and segments for global temporary tables.
WHen a segment is allocated, it takes time to find the blocks that are free and to format those blocks.
Oracle's performance measure to counter the cost of finding and formatting free blocks is to leave the segment allocated at that kind of block. When a session terminates, any temprary segments it holds will be released to the free pool of 'that type of temprary segment', and another session can then (as you say) reuse the space.
Still, this is frustrating for the new DBA who has not read the concepts manual and not searched the forum on 'v$sort' or 'temporary tablespace usage'.
http://download-east.oracle.com/docs/cd/B19306_01/server.102/b14220/logical.htm#sthref399 -
Is there any way to alter temp tablespace into normal tablespace
Even though It might be stupid question, i want to know the solution for that...
Is it possible to alter TEMP tablespace into Normal tablespace?
One more question, is it possible to create user with TEMP tablespace,
(I know the usage of temp tablespace also, and we cannot create user with temp tablespace.)
If some trick or any solution, share with me.
Thanks in advance.1) Can you explain why you want such an unusual situation. By understanding your requirement, perhaps we can suggest alternatives
2) The requirements and restrictions are described in the CREATE USER command in the SQL Reference manual for whatever version you are using. (The stupid part of your question happens by not specifying any version range. <g>)
The requirement to use a TEMPORARY tablespace is documented and enforced in 9i. In 8i, we only required a tablespace to be named.
3) On 10gR2 you see the following response:
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
C:\Documents and Settings\Hans>sqlplus system/oracle
SQL*Plus: Release 10.2.0.1.0 - Production on Wed Jun 18 06:33:31 2008
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Express Edition Release 10.2.0.1.0 - Production
SQL> create user test1 identified by test account unlock
2 default tablespace temp
3 temporary tablespace temp;
create user test1 identified by test account unlock
ERROR at line 1:
ORA-12910: cannot specify temporary tablespace as default tablespace
SQL> create user test2 identified by test account unlock
2 default tablespace users
3 temporary tablespace users;
create user test2 identified by test account unlock
ERROR at line 1:
ORA-10615: Invalid tablespace type for temporary tablespace
SQL> create user test3 identified by test account unlock
2 default tablespace users
3 temporary tablespace temp;
User created.
SQL Rem Just on case it's complaining about using the same temp tablespace
SQL> create temporary tablespace temp2 tempfile 'C:\ORACLE\ORADATA\XE\TEMP2.DBF'
size 10m;
Tablespace created.
SQL> create user test4 identified by test account unlock
2 default tablespace temp
3 temporary tablespace temp2;
create user test4 identified by test account unlock
ERROR at line 1:
ORA-12910: cannot specify temporary tablespace as default tablespace
SQL> -
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$TEMPSEG_USAGE.
Hemant K Chitale
http://hemantoracledba.blogpsot.com -
I have a problem with storage space of my default temporary table space.
For my application, I specified the default table space as "DEFTBSPACE" with size 4000MB and temporary table space as "TEMP" with size 14486MB. Now, my usage of my temporary table space is increasing rapidly (Now, the used temp tablespace is 14485MB almost 99.99%). What could be the reason..? Is there any thing going into TEMP tablespace by mistake?.
Please help.
Reagrds,
Satish.Can we deallocate manually the data file or a part of the datafile so that the usage space is reduced. What's the solution to reduce the usage space of this TEMP tablespace.If you bounce the db, you will get all used space.
I heared, dropping and recreating the TEMP tablespace is the only the solution for this..??Is it true?
Yes it is absolutely true.
Create another temp tabelspace and set as default temp tablespace and drop the previous one. However, make sure no one is currently using that temp tablespace.
The reason that you haven't get any result query v$sort_usge is that no one is using temp currently.
You can also use v$tempseg_usage.
Jaffar
OCP DBA -
Temp Tablespace space needed to create an index of 52GB - preventing 01652
Hi,
I've seen quiet a few threads on the subject, but could not find a clear (to me) answer on the subject.
We have a huge table made by 30/40 partitions of roughly 20M records each (each record being about 1k of size), overall 800GB.
The index we already have shows:
1* select sum(bytes/1024/1024) from dba_segments where segment_name like 'CALL_LOG_I0'
SQL> /
SUM(BYTES/1024/1024)
52088
so that I assume it's 52GB in size. Since we have to create another very similar one I would assume the size would be similar.
Command would be:
create index call_log_i0_new on call_log (msisdn, generation_timestamp, cdr_reference_number, Multiple_AMA_Sequence_Number) NOLOGGING online;
Tried the NOSORT option but it's not compatible with the online option.
After a while the TEMP tablespace got filled up (we have about 20GB space in there).
My question is if I need to have a temp tablespace at least as big as the index size (52GB) to let the index be built online.
Thanks in advance !
Cheers,
MikeThanks to all, found useful information in Metalink following your suggestions:
You need to add more space to the tablespace where the index is created.
A possible option to reduce sort space usage is to use the NOSORT option.
Your table contains 66 million rows. The average row length is
50-60 bytes and you are indexing 4 of 5 columns in the table.
Example space calculation:
66 million rows * 50 (avg row length) = 3.3 gig of data
Rule of thumb:
upper bound for sort (not guaranteed) is 3 times data_
= about 10 gig of sort space needed
These numbers are scaring since assume that I may need much more space than the index size (about 3x) which is something we cannot afford. Will go with the NOSORT option once the system is brought down and we could skip the online option.
Thanks to all !
Mike -
Hi,
in 8.1.7 under Win 2003 (yes not supported). TEMP tablespace is used at 98%. Should we enlarge temp file or it is not necessary and Oracle manges it automatically ?
Many thanks.> TEMP tablespace is used at 98%.
Question.. what is better? A 50% used TEMP tablespace? And if you think so, why would it be "better"?
Consider this for CPUs. Let's say you have 32 CPUs in your server. Only 2 are used at 100%. The remaining 30 CPUs are idle.
What is good about this? Nothing much. And bad? What is especially bad is that you/your company paid loads of money for those 30 CPUs that are now sitting and doing absolutely nothing. What a waste!
Back to temp space. Is a 50% temp space usage "better" than 98%? No.
Temp space is a resource. A resource (CPU, space, memory, etc) is there to be used. If it is only used 50%, then the remaining 50% is a "waste". So in that respect, 98% is a LOT better than 50%. It seems that temp space has been correctly sized and that the vast majority of it, is being used.
When is 98% (or 99% or a 100%) a problem? When there is not enough.. and more is still needed. And Oracle will inform you of that via error messages. (e.g. unable to extend temp space by x)
This is only part of the resource utilisation puzzle of course. The other parts deal with how effectively the resources are being used. Is that 98% utilisation effective and efficient utilisation? (which needs you to look at HOW it is being used in order to determine WHY it is being used in order to answer these questions) -
Dear all,
Is there any script which gives the
list of quaries which heavily uses temp tablespace.Because my temp tablespace size is 32 gb , some times usage will go till 28gb , and it will reset to 0,
i need to know what quary it is running when the usage is at 28 gb.
Please help me regard this,
Regards,
Vamsi.Check with below query.
SELECT
b.tablespace tablespace_name
, a.username username
, a.sid sid
, a.serial# serial_id
, b.contents contents
, b.segtype segtype
, b.extents extents
, b.blocks blocks
, (b.blocks * c.value) bytes
FROM
v$session a
, v$sort_usage b
, (select value from v$parameter
where name = 'db_block_size') c
WHERE
a.saddr = b.session_addr
========= output =======================
Tablespace Name Username SID Serial# Contents Segment Type Extents Blocks Bytes
TEMP SYS 128 9 TEMPORARY LOB_DATA 1 128 1,048,576
SYS 137 1 TEMPORARY DATA 1 128 1,048,576
sum 2 256 2,097,152
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