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  Oracle Tips by Burleson

Chapter 2 Inside the Oracle Shared Pool

Oracle8 introduced a new area, the large pool, controlled by the large_pool_size parameter. In general, it is suggested that the shared pool size start at 40 megabytes and increase from there. The large pool size will depend on the number of concurrent users, the number of multi-threaded server servers, and the dispatchers and sort requirements for the application.

What should be monitored to determine if the shared pool is too small? This information can be gleaned from the data dictionary tables, specifically the v$sgastat and v$sqlarea views. The report below shows how much of the shared pool is in use at any given time.

shared_pool_ora73.sql

--**********************************************
--
--   Copyright © 2003 by Rampant TechPress Inc.
--
--   Free for non-commercial use.
--   For commercial licensing, e-mail info@rampant.cc
--
-- *********************************************
 
column shared_pool_used  format 9,999.99
column shared_pool_size  format 9,999.99
column shared_pool_avail format 9,999.99
column shared_pool_pct   format 999.99
 
@title80 'Shared Pool Summary'
spool rep_out\&db\shared_pool
 
select


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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