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Temporary Tablespace and Datafile Management in Oracle database

Temporary Tablespace and Datafile Management in Oracle database

1.  For Finding temp file and temp tablespace with size

SELECT file#, 
       status, 
       bytes / 1024 / 1024 “Size_MB”, 
       name 
FROM   v$tempfile; 

SELECT file_name, 
       tablespace_name, 
       bytes / 1024 / 1024 / 1024, 
       status 
FROM   dba_temp_files; 

2. Add tempfile to existing temp tablespace

SQL>ALTER TABLESPACE temp ADD tempfile ‘/u02/apps/oracle/temp01_01.dbf’ SIZE 
2048m; 

3. Add new temp tablespace and make as default

SQL>CREATE TEMPORARY TABLESPACE temp2 tempfile ‘/u02/apps/oracle/temp01.dbf’ SIZE 2g autoextend ON;

SQL>ALTER DATABASE DEFAULT TEMPORARY TABLESPACE temp2; 

Note: use “reuse” if datafile physically exists.

4. Making old Temporary Tablespace Offline

SQL>ALTER DATABASE tempfile ‘/u02/apps/oradata/temp01.dbf’ OFFLINE; 

5. Drop Temporary Tablespace 

SQL>DROP TABLESPACE temp INCLUDING CONTENTS AND datafiles;

NOTE: Don’t drop immediatly, Check user is using TEMP tablespace by the Below Given Query, then you can drop

SELECT a.username, 
       a.osuser, 
       a.sid 
       ||‘,’ 
       ||a.serial#                  SID_SERIAL, 
       c.spid                       Process, 
       b.tablespace                 tablespace, 
       a.status, 
       SUM(b.extents) * 1024 * 1024 SPACE 
FROM   v$session a, 
       v$sort_usage b, 
       v$process c, 
       dba_tablespaces d 
WHERE  a.saddr = b.session_addr 
       AND a.paddr = c.addr 
       AND b.tablespace = d.tablespace_name 
GROUP  BY a.username, 
          a.osuser, 
          a.sid 
          ||‘,’ 
          ||a.serial#, 
          c.spid, 
          b.tablespace, 
          a.status; 

6. Shrink Temporary Tablespace

SQL>ALTER TABLESPACE temp shrink tempfile ‘/u02/apps/oradata/temp01.dbf’ keep 10g;

About Syed Saad Ali

As a certified and experienced Oracle Database Administrator with Almost 10 Years of Experience I am able to perform all levels of database maintenance and am fully qualified to do Oracle updates as well. Capitalizing on my interest in Business & IT both, I chose to navigate my career towards Enterprise Solutions, which has enabled me to excel in the combination of both. I have developed exceptional analytical skills that allow me to diagnose and take care of issues immediately. Extremely skilled in planning and execution of special projects in time- critical environments. Extensive knowledge in directing, coordinating and exercising concern authority for planning, organization, control and successful completions. Very skilled at solving customer relations issues by seeking first to understand and then to be understood. Effectively able to communicate with customers, vendors and management.

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