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  Oracle Tips by Burleson

Chapter 1 Oracle Instance Internals Scripts

Object Name                        Number Num blocks    Touches
------------------------------ ---------- ---------- ----------
DIM_PRODUCT                           209        932     117845
DIM_CUSTOMER                          209       1452      73385
DIM_DAILY_CALENDAR                    209         26         85
DIM_LOCATION                          209          1         73
DIM_FUND_CATEGORY                     209          1         34
DIM_HIST_STOCK_NUMBER                 209          1         28
DIM_OWNER                             209          1         24
MTV_DIM_REPORT_ON_DATE                209          1          3
DIM_HIST_RPTLOC                       209          1          2
DIM_SHIPPING_METHOD                   209          1          2

Given this data, we would examine DIM_PRODUCT and DIM_CUSTOMER to find problems. Further investigation showed that these tables undergo few INSERT or DELETE operations, but do undergo numerous UPDATEs, however, these UPDATE activities rarely actually change data, driving the touch count way up and possibly causing the high wait counts. In addition the process is not doing multiple simultaneous inserts into a single block, but may be doing multiple serial inserts that should not cause freelist or ini_trans contention. The solution in this case is to re-write the application code to only update what is needed.

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.

See the Oracle script collection::



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