Call now: 252-767-6166  
Oracle Training Oracle Support Development Oracle Apps

 E-mail Us
 Oracle Articles
New Oracle Articles

 Oracle Training
 Oracle Tips

 Oracle Forum
 Class Catalog

 Remote DBA
 Oracle Tuning
 Emergency 911
 RAC Support
 Apps Support
 Oracle Support

 SQL Tuning

 Oracle UNIX
 Oracle Linux
 Remote s
 Remote plans
 Application Server

 Oracle Forms
 Oracle Portal
 App Upgrades
 SQL Server
 Oracle Concepts
 Software Support

 Remote S


 Consulting Staff
 Consulting Prices
 Help Wanted!


 Oracle Posters
 Oracle Books

 Oracle Scripts

Don Burleson Blog 








SQL hanging on TEMP space usage

Oracle Database Tips by Donald Burleson


For more complete details on diagnosing a hung database, see the book "Advanced Oracle Utilities: The Definitive Reference".

In some cases you can see a "hang" situation when someone is modifying a file used for temp space.  IN these cases, the wait event for TEMP space will include:


SID 1467
EVENT enq: SS - contention
P1TEXT name|mode
P2TEXT tablespace #
P3TEXT dba


Next, you can find the source of the hanging contention.  Here is a complete article on getting the values from p1, p2 and p3.

P1'the absolute file number for the data file involved in the wait.

P2'the block number within the data file referenced in P1 that is being waited upon.

P3'the reason code describing why the wait is occurring.

Here's an Oracle data dictionary query for these values:

   p1 "File #".
   p2 "Block #",
   p3 "Reason Code"
   event = 'xxx';



This script was used to find the source of the TEMP usage, in this case, SS contention:


select distinct
   w.p2text as reason, as tablespace,
   nvl(ddf.file_name, dtf.file_name)
   v$session_wait w,
   v$session u,
   v$tablespace ts
left outer join
   dba_data_files ddf on ddf.tablespace_name =
left outer join
   DBA_TEMP_FILES dtf on dtf.tablespace_name =
where u.sid = w.sid
and w.p2 = ts.TS#
and w.event = 'enq: SS - contention';




Oracle Training at Sea
oracle dba poster

Follow us on Twitter 
Oracle performance tuning software 
Oracle Linux poster


Burleson is the American Team

Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals.  Feel free to ask questions on our Oracle forum.

Verify experience! Anyone considering using the services of an Oracle support expert should independently investigate their credentials and experience, and not rely on advertisements and self-proclaimed expertise. All legitimate Oracle experts publish their Oracle qualifications.

Errata?  Oracle technology is changing and we strive to update our BC Oracle support information.  If you find an error or have a suggestion for improving our content, we would appreciate your feedback.  Just  e-mail:  

and include the URL for the page.


Burleson Consulting

The Oracle of Database Support

Oracle Performance Tuning

Remote DBA Services


Copyright © 1996 -  2020

All rights reserved by Burleson

Oracle ® is the registered trademark of Oracle Corporation.