we are using v$sort_segment to calculate temp file usage. but one of my temp tablespace not available in v$sort_segment table. IS there any other way to get the correct usage which returns the same value as in v$sort_segment?
V$SORT_SEGMENT only gets populated as a temporary segment is required. For example, if I create a second temp tablespace, then it does not appear because it is not in use
SQL> create temporary tablespace temp2 tempfile 'X:\ORACLE\ORADATA\DB19\PDB1\TEMP02.DBF' size 20m;
Tablespace created.
SQL> select tablespace_name from v$sort_segment;
TABLESPACE_NAME
------------------------
TEMP
If you want a view of all of your temporary tablespaces, you can outer join either DBA_TABLESPACES (type=TEMPORARY) or DBA_TEMP_FILES to V$SORT_SEGMENT.
Related
I was given a query that's running out of space in the TEMP tablespace. (see error-message below) As a quick solution to get the user back up and running, I simply added a TEMPFILE to the tablespace. (see alter statement below) But, when I ran the query again, it still ran out of space. I can see from querying dba_temp_files that the tablespace is pretty big, and it does contain both datafiles, but I thought the MAXSIZE UNLIMITED clause would have solved my problem by not allowing the new datafile to run out of space.
Besides rewriting the query, what would you recommend?
Thanks!
Dave
SQL Error: ORA-01652: unable to extend temp segment by 128 in tablespace TEMP
01652. 00000 - "unable to extend temp segment by %s in tablespace %s"
*Cause: Failed to allocate an extent of the required number of blocks for
a temporary segment in the tablespace indicated.
*Action: Use ALTER TABLESPACE ADD DATAFILE statement to add one or more
files to the tablespace indicated.
ALTER TABLESPACE temp
ADD TEMPFILE '+DATAC1/cop3/tempfile/temp01.dbf' SIZE 10g
AUTOEXTEND ON
NEXT 1g
MAXSIZE UNLIMITED;
SQL> SELECT substr(tablespace_name,1,4) as tbls,
2 substr(file_name,1,40) as file_name,
3 bytes/1000000000 as gigabytes
4 FROM dba_temp_files
5 WHERE tablespace_name = 'TEMP'
6 ;
TBLS FILE_NAME GIGABYTES
---- ---------------------------------------- ----------
TEMP +DATAC1/cop3/tempfile/temp.771.915115045 21.4748365
TEMP +DATAC1/cop3/tempfile/temp01.dbf 34.359722
Can one db file be shared between table space ?
I am deleting temp table space as below,
1)Get all the files in table
space :: SELECT FILE_NAME FROM DBA_TEMP_FILES WHERE TABLESPACE_NAME =
'TEMPRM_TEMP';
2)Drop all the files in the table space :: ALTER
TABLESPACE TEMPRM_TEMP DROP TEMPFILE
'/tmp/TEMPRM/create/TEMPRM/datafile/o1_mf_temprm_t_bw3yo9lv_.tmp';
3)Drop the actual table space :: DROP TABLESPACE TEMPRM_TEMP INCLUDING
CONTENTS AND DATAFILES;
Are there any harm with this procedure ?
is this the only temp tablespace in your database? if the answer is yes, then you will not be able to drop it. If anyone is connected to the tablespace, you will not be able to drop it. If this is not the only temp tablespace, and noone is connected to it, then it will work and is safe.
Ok here we go oracle doc
A tablespace in an Oracle database consists of one or more physical datafiles. A datafile can be associated with only one tablespace and only one database.
I want to clean up the Temp table space which have datafiles
temp01.dbf and temp02.dbf, so please suggest me should I drop
temp01.dbf file or drop the temp tablespace. Datafiles of Temp tablespaces is given below
33G temp01.dbf
1.5G temp02.dbf
Create Temporary Tablespace Temp
CREATE TEMPORARY TABLESPACE TEMP2 TEMPFILE ‘/u01/app/oradata/temp01.dbf′ SIZE 2000M ;
Move Default Database temp tablespace
ALTER DATABASE DEFAULT TEMPORARY TABLESPACE temp2;
Make sure No sessions are using your Old Temp tablespace
a. Find Session Number from V$SORT_USAGE:
SELECT USERNAME, SESSION_NUM, SESSION_ADDR FROM V$SORT_USAGE;
b. Find Session ID from V$SESSION:
If the resultset contains any rows then your next step will be to find the SID from the V$SESSION view. You can find session id by using SESSION_NUM or SESSION_ADDR from previous resultset.
SELECT SID, SERIAL#, STATUS FROM V$SESSION WHERE SERIAL#=SESSION_NUM;
OR
SELECT SID, SERIAL#, STATUS FROM V$SESSION WHERE SADDR=SESSION_ADDR;
c. Kill Session:
Now kill the session with IMMEDIATE.
ALTER SYSTEM KILL 'SID,SERIAL#' IMMEDIATE;
Drop temp tablespace
DROP TABLESPACE temp INCLUDING CONTENTS AND DATAFILES;
Recreate Tablespace Temp
CREATE TEMPORARY TABLESPACE TEMP TEMPFILE '/u01/app/temp/temp01.dbf′ SIZE 2000M;
6 Move Tablespace Temp, back to new temp tablespace
ALTER DATABASE DEFAULT TEMPORARY TABLESPACE temp;
Drop temporary for tablespace temp
DROP TABLESPACE temp2 INCLUDING CONTENTS AND DATAFILES;
Thanks #anudeepks! Just wanna point something, in step 5 the sentence should be as follows:
CREATE TEMPORARY TABLESPACE TEMP TEMPFILE '/u01/app/temp/temp.dbf′ SIZE 2000M;
(Note that the filename has changed from temp01.dbf to temp.dbf). Otherwise we get an error because the file already exists, and also such file will be deleted on step 7.
I execute a SQL query with hibernate and the application give the error:
ORA-01652: unable to extend temp segment
The TABLE SPACE has 4 GB.
The strange thing is that the query from the application yesterday was working fine, and today it doen't work.
I have not made any changes either in the database or application.
The oracle version is Oracle 11g
You are running short on space in temp tablespace , use this query t check how much space you have in your temp tablespace
SQL> select file_name,SUM(bytes)/1024/1024 "Current_size_mb", sum(maxbytes)/1024/1024 "max_size_mb" from dba_temp_files group by file_name;
FILE_NAME Current_size_mb max_size_mb
---------------------------------------------------------------------- --------------- -----------
C:\AKS\AKDB\ORADATA\RESEARCH\TEMP01.DBF 20 32767.9844
Adding a new tempfile to temp tablespace
SQL> alter tablespace temp add tempfile 'C:\AKS\AKDB\ORADATA\RESEARCH\TEMP02.DBF' size 100m autoextend on maxsize 1g;
Temporary tablespace called TEMP which is used internally by database for operations like distinct, joins,etc to fetch large amount of data.
So, after increasing the size of TEMP tablespace the issue can be resolved.
Follow this link : How to shrink temp tablespace in oracle?
I am a moderate user of Oracle and I had to create some of the tables in specified table space as shown below.
create table t_abc tablespace abc_tbspc as select * from abc;
create table t_xyz tablespace abc_tbspc as select * from xyz;
After running these through jobs (file containing around 5 tables to be created in a single tablespace), I could see that the table t_abc is created in abc_tbspc ; but the table t_xyz is assigned to null when I query the all_tables. Not sure why the 2nd table is not created in the specified tablespace even though there is abundant space in the table space.
TABLESPACE_NAME will be null for one of these reasons:
Temporary Temporary tables use a temporary tablespace.
Index Organized Index-organized tables store data in an index, not in a heap.
Partitioned Each partition could have a different tablespace, there is not necessarily one tablespace for the whole table.
External External tables do not store their data in a tablespace.
Your code should not meet one of the conditions above; did you leave out some details? I ran the query below to look for other cases where TABLESPACE_NAME is null but could not find any.
select *
from dba_tables
where tablespace_name is null
and (temporary is null or temporary <> 'Y') -- #1
and (iot_type is null or iot_type <> 'IOT') -- #2
and (partitioned is null or partitioned <> 'YES') -- #3
and (owner, table_name) not in -- #4
(select owner, table_name from dba_external_tables)