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 








Oracle Metric rdbms ipc reply

Oracle Consulting Tips by Burleson


The rdbms ipc reply Oracle metric event is used to wait for a reply from one of the background processes.

Steve Adams notes on "rdbms ipc reply":

"Your write complete waits and rdbms ipc reply waits indicate the either DBWn's write batch is too big, or you are checkpointing too intensively. Make sure that db_files is not much higher than the number of datafiles that you actually have. If you are using incremental checkpoints ( db_block_max_dirty_target) don't be too ambitious."


On Oracle MOSC Forums, a user was having trouble with a slow database, and was concerned with the rdbms ipc reply was the highest wait event.  A replier helped resolve the issue by infroming the user that they should:

1. Make sure your parfile has the line COMMIT=N
Otherwise, Oracle will perform a commit after each row is inserted, and that may be the cause of your problems.
2. Enlarge the size of your redo till you are only performing 1 log switch every 10-20 minutes.
3. 'RDBMS IPC REPLY' is shared memory segments passing messages (usually flags) back and forth. This is nothing to get worried about, and most people consider it to be an idle wait event.
4. Run a statspak report for 15 minutes during the import, and that will show where your problems really are, like hot blocks etc.


This, and many other Oracle performance metrics are discussed in my book "Oracle Tuning" by Rampant TechPress.  You can buy it directly from the publisher and save 30% at this link:



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 -  2017

All rights reserved by Burleson

Oracle ® is the registered trademark of Oracle Corporation.

Remote Emergency Support provided by Conversational