Call for Oracle support & training (800) 766-1884
Free Oracle Tips

Home
Corporate Oracle Training
Custom Oracle Training
Oracle New Features Training
Advanced Oracle DBA Classes
Oracle Tuning Courses
Oracle Tips & Tricks
Oracle Training Links
Oracle Training Links
Oracle Training Links

We are top for USA Oracle Training Clients

 

Free Oracle Tips


 
HTML Text AOL

Free Oracle App Server Tips


 
HTML Text

Oracle support

Oracle training

Oracle tuning

Rednecks!

Remote Oracle

Custom Oracle Training

 

   
  Oracle Tips by Burleson

OCP Instructors Guide for Oracle DBA Certification

Chapter 7 - Tuning and Performance

Segment-Level Performance Statistics Collection

Starting with Oracle9i Release 2, administrators are able to gather statistics at the individual segment level.  Don’t confuse segment-level performance statistics with optimizer statistics generated from a dbms_stats  execution or SQL ANALYZE statement.

Segment-level performance statistics are a subset of the statistics captured at the system level.  A list of the statistics captured is as follows:

  • Logical reads – buffers used for consistent and current reads
     

  • Buffer busy waits – waits caused by a buffer that is in use
     

  • Db block changes – changes applied to buffers
     

  • Physical reads – number of physical reads
     

  • Physical writes – number of physical writes
     

  • Physical reads direct – number of direct reads
     

  • Physical writes direct – number of direct writes
     

  • ITL waits – waits caused by no ITL entry
     

  • Row lock waits – waits caused by row lock contention
     

  • Global cache cr blocks served – Real Application Cluster statistical information
     

  • Global cache current blocks served – Real Application Cluster statistical information
     


The above text is an excerpt from:


OCP Instructors Guide for Oracle DBA Certification
A Study Guide to Advanced Oracle Certified Professional Database
Administration Techniques

ISBN 0-9744355-3-8

by Christopher T. Foot
 

http://www.rampant-books.com/book_2003_2_OCP_print.htm


Download your Oracle scripts now:

www.oracle-script.com

The definitive Oracle Script collection for every Oracle professional DBA

 
 
 

Oracle performance tuning book

 

 

Oracle performance tuning software

 
Oracle performance tuning software
 
Oracle performance Tuning 10g reference poster
 
Oracle training in Linux commands
 
Oracle training Excel
 
 
 
 

 

email BC:


Copyright © 1996 -  2014 by Burleson Inc. All rights reserved.

Oracle® is the registered trademark of Oracle Corporation.