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  Oracle Tips by Burleson

Chapter 1 Oracle Instance Internals Scripts

So when monitoring waits you can see that you need to examine not just the counts of waits, but the time spent in a wait condition. You have also seen how to drill down from the basic I/O wait indications to the file and ultimately to the table or object to see the actual object that may be causing the problem. Once we have the objects that may be the cause of high wait counts we have looked at the various causes of the waits and seen an example analysis for cause. Hopefully you will come away with a better understanding of how to isolate I/O wait problems and resolve them using database statistics instead of guesswork.

Monitoring Events

Oracle is an event-driven system. This means that sessions wait for calls, locks and latches spin, and processes slumber and wake at the behest of events. The v$session_event dpt tracks all current events by session. The script below will generate a report on current Oracle events.

events.sql

--**********************************************
--
--   Copyright © 2003 by Rampant TechPress Inc.
--
--   Free for non-commercial use.
--   For commercial licensing, e-mail info@rampant.cc
--
-- *********************************************
 
COLUMN sid                 HEADING Sid
COLUMN event               HEADING Event            FORMAT a40


The above text is an excerpt from:
 

Mike Ault’s Oracle Internals Monitoring & Tuning Scripts
 

Written by the world's top DBA and author of over 20 Oracle books, Mike Ault shares his secrets for Oracle DBA management scripts.  This handy reference is indispensable for all Oracle professionals who must quickly automate and manage their Oracle databases with scripts.

This stellar book comes complete with an online code depot full of over 200 pre-tested Oracle DBA scripts, and covers all areas of Oracle database administration including data files, tablespace, table and index management scripts.  Based on more than 20 years full-time experience, Mike Ault brings his expertise to the public with this fantastic book.  Your time savings from a single script is worth the price of this great book.

Mike Ault is one of the leading names in Oracle technology.  The author of 20 books and hundreds of articles in national publications, Mike was the first popular Oracle author with his landmark book "Oracle7 Administration and Management".  Mike also wrote several of the "Exam Cram" books, and enjoys a reputation as a leading author and Oracle consultant.

Mike started working with computers in 1979 right out of a stint in the Nuclear Navy. He began working with Oracle in 1990 and has since become a World Renowned Oracle expert (in the words of his publisher anyway!) Mike has written 14 Oracle related books, dozens of articles, and has presented at conferences in Europe and the USA. Mike has two wonderful daughters and is kept out of trouble by his wife of 29 years, Susan.


http://www.rampant-books.com/book_2003_2_ault_internals.htm
 

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