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 







resmgr:cpu quantum Tips

Oracle Database Tips by Donald BurlesonNovember 7, 2015

Question:  How can I tell of I have an overloaded CPU?  I know that the 100% utilization is normal, but I heard that the "resmgr:cpu quantum" event indicates that tasks are waiting for CPU resources.

Answer:  The wait event resmgr:cpu quantum is a normal wait event used by the Oracle Resource Manager to control CPU distribution.   The resmgr:cpu quantum only occurs when the resource manager is enabled and the resource manage is "throttling" CPU consumption.

You can also detect an overloaded CPU when you see the "resmgr:cpu quantum" event in a top-5 timed event on a AWR or STATSPACK report.

The "resmgr:cpu quantum" only applies when the Oracle resource manager is deployed, and there are other ways to detect an overloaded CPU:

1 - UNIX/Linux - vmstat when the runqueue column (r) exceed the cpu_count for the database

2 Windows:  When the processor queue length is greater than zero.  See detecting_windows_cpu_processor_bottlenecks.

Get the Complete
Oracle SQL Tuning Information 

The landmark book "Advanced Oracle SQL Tuning  The Definitive Reference"  is filled with valuable information on Oracle SQL Tuning. This book includes scripts and tools to hypercharge Oracle 11g performance and you can buy it for 30% off directly from the publisher.



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.



Oracle Training at Sea
oracle dba poster

Follow us on Twitter 
Oracle performance tuning software 
Oracle Linux poster