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 







Linda Webb

Got breaking Oracle news?    Burleson Consulting Oracle News

Click here for more Oracle News Headlines


Sizing RAM for Oracle with Sun Solaris

George Schlossnagle has published an excellent document on memory sizing for Oracle on Sun Solaris:


• Application Memory


This is our process memory, much of it Oracle. The RMC package

contains good tools (notably pmem) that allow good visibility into the

memory usage by individual processes. We’ve already used it a bit

to determine the memory usage for our Oracle processes above. The

Memtool documentation is a great source for more information.


• FileSystem Buffer Cache


If direct IO is not performed on your datafiles, their filesystem will do

caching to buffer writes to disk and to improve future reads.


For large filesystems, a buffer cache can exert significant memory pressure. The filesystem buffer cache does not consume a fixed amount of memory, but is managed by the virtual memory system and utilizes the same memory as processes. Even on tight-memory systems severe pressure

can be exerted. Using memps -m we can get good detail on what is in

the buer cache:



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