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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#, 
       bytes / 1024 / 1024 “Size_MB”, 
FROM   v$tempfile; 

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

2. Add tempfile to existing temp tablespace

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

3. Add new temp tablespace and make as default

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


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 


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

SELECT a.username, 
       ||a.serial#                  SID_SERIAL, 
       c.spid                       Process, 
       b.tablespace                 tablespace, 
       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, 

6. Shrink Temporary Tablespace

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

About Syed Saad Ali

With 13 years of experience as a certified and skilled Oracle Database Administrator, I possess the expertise to handle various levels of database maintenance tasks and proficiently perform Oracle updates. Throughout my career, I have honed my analytical abilities, enabling me to swiftly diagnose and resolve issues as they arise. I excel in planning and executing special projects within time-sensitive environments, showcasing exceptional organizational and time management skills. My extensive knowledge encompasses directing, coordinating, and exercising authoritative control over all aspects of planning, organization, and successful project completions. Additionally, I have a strong aptitude for resolving customer relations matters by prioritizing understanding and effective communication. I am adept at interacting with customers, vendors, and management, ensuring seamless communication and fostering positive relationships.

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