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 Database Tips by Donald Burleson

Oracle10g Grid Computing with RAC
Chapter 8 - RAC Administration

Initialization Parameters for ASM Instances

Parameters                      Description


This parameter determines the maximum power on an ASM instance for disk rebalancing operations. The default is 1, which is also the most intrusive to database operations, a higher setting makes the rebalancing operations less intrusive.


The purpose of this parameter is to limit the set of disks that Automatic Storage Management considers for discovery. If not specified the entire system is searched for compatible volumes which can lengthen startup time. The parameters default value is NULL. (This default causes ASM to find all of the disks in a platform-specific location to which it has read/write access.)


This parameter lists the names of disk groups that will be mounted by an ASM instance at startup, or when the ALTER DISKGROUP ALL MOUNT statement is issued. The parameters default value is NULL. (If this parameter is not specified, then no disk groups are mounted.) This parameter is dynamic if you are using a server parameter file (SPFILE), however you should rarely need to alter this value. ASM automatically adds a disk group to this parameter when a disk group is successfully mounted by the ASM instance, and automatically removes a disk group that is specifically dismounted. However, if you use a traditional text initialization parameter file, remember that you need to edit the initialization parameter file to add the name of any disk group that you want automatically mounted at instance startup, and remove the name of any disk group that you no longer want mounted.

Table 8.5 ASM Only Initialization Parameters

The above text is an excerpt from:

Oracle 10g Grid & Real Application Clusters
Oracle 10g Grid Computing with RAC
ISBN 0-9744355-4-6

by Mike Ault, Madhu Tumma


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.