BC remote Oracle DBA - Call (800) 766-1884  
Oracle Consulting Oracle Training Development

Remote DBA

Remote DBA Plans  

Remote DBA Service

Remote DBA RAC

   
Remote DBA Oracle Home
Remote DBA Oracle Training
Remote DBA SQL Tuning Consulting
Remote DBA Oracle Tuning Consulting
Remote DBA Data Warehouse Consulting
Remote DBA Oracle Project Management
Remote DBA Oracle Security Assessment
Remote DBA Unix Consulting
Burleson Books
Burleson Articles
Burleson Web Courses
Burleson Qualifications
Oracle Links
Remote DBA Oracle Monitoring
Remote DBA Support Benefits
Remote DBA Plans & Prices
Our Automation Strategy
What We Monitor
Oracle Apps Support
Print Our Brochure
Contact Us (e-mail)
Oracle Job Opportunities
Oracle Consulting Prices





   

 

 

 

Remote DBA services

Remote DBA Support

Remote DBA RAC

Remote DBA Reasons

Remote Oracle Tuning

Remote DBA Links

Oracle DBA Support

Oracle DBA Forum

Oracle Disaster

Oracle Training

Oracle Tuning

Oracle Training

 Remote DBA SQL Server

Remote MSSQL Consulting

Oracle DBA Hosting

Oracle License Negotiation

 

 


 

 

 

 

   
 

Oracle 8 Tips  

by Burleson Consulting

The Data Warehouse Development Life Cycle

Oracle Features for the Data Warehouse

Oracle Bitmapped Indexes

Listing 8.10  Locate Bitmapped candidates for cost-based optimizer
 

rem idx_bad2.sql -- Copyright (c) 1996 by Donald K. Burleson

set pagesize 60;

set linesize 100;

 

column c1 heading 'Index'      format a25;

column c2 heading 'Status'     format a10;

column c3 heading 'Level'      format 999;

column c4 heading 'dist. Keys' format 99,999,999;

 

spool ind_bad2.lst;

 

prompt Change to bittmapped index if distinct_keys < 50

 

select

  owner||'.'||index_name      c1,

  status                      c2,

  blevel                      c3,

  distinct_keys               c4

from Remote DBA_indexes

where

distinct_keys < 50 and leaf_blocks > 500

order by distinct_keys desc;

 

spool off;

 

Listing 8.11 shows the output from this script:

 

Listing 8.11  Bitmapped candidate report for cost-based optimizer
 

sql>  @idx_bad2

 

Index                     Status     Level  dist. Keys

------------------------- ---------- ----- -----------

DON.DON_FK_ACT            VALID          2          47

DON.CSB_EK_MONTH_YEAR     VALID          2          37

DON.DON_EK_ROLE_TY_DEST   VALID          2          10

DON.DON_FK_SRC            VALID          2          10

DON.SHL_FK_SRC            VALID          2           9

DON.DON_FK_PLT            VALID          2           4

DON.INF_EK_ABBR_CD_LOADED VALID          2           4

DON.DON_FK_SPT            VALID          2           4

DON.INV_FK_INT            VALID          2           3

DON.INV_FK_SRC            VALID          2           1

DON.DON_FK_RAT            VALID          2           1

 

11 rows selected.


This is an excerpt from "High Performance Data Warehousing", copyright 1997. To learn more about Oracle, try "Oracle Tuning: The Definitive Reference", by Donald K. Burleson.  You can buy it direct from the publisher at 30% off here:
http://www.rampant-books.com/book_1002_oracle_tuning_definitive_reference_2nd_ed.htm

|

 

Remote DBA Service
 

Oracle Tuning Book

 

Advance SQL Tuning Book 

BC Oracle support

Oracle books by Rampant

Oracle monitoring software

 

 

 

 

 

 

BC Remote Oracle Support

Remote DBA

Remote DBA Services

Copyright © 1996 -  2013 by Burleson. All rights reserved.

Oracle® is the registered trademark of Oracle Corporation.