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Chapter 6 Oracle Tablespace and File Internals Scripts

There are two exceptions that bigfile tablespace segments are manually managed:

  • Locally managed undo tablespace
     

  • Temporary tablespace

Bigfile tablespace are intended to be used with Automated Storage Management (see chapter one) or other logical volume managers that support RAID.

Bigfile Tablespace Benefits

Bigfile tablespace has the following benefits:

  • It simplifies large database tablespace management by reducing the number of datafiles needed.
     

  • It simplifies datafile management with Oracle-managed files and Automated Storage Management (AMS) by eliminating the need for adding new datafiles and dealing with multiple files.
     

  • It allows you to create bigfile tablespace up to 8 exabytes (8 million terabytes) in size, and significantly increase the storage capacity of an oracle database.
     

  • It makes the concept that a tablespace and a datafile are logically equivalent.

Maximum Database Size

The BFT extended the maximum size of tablespace and database.  Let us take a look at the two formulas that calculate the maximum size of data file and database.  

The maximum data file size is calculated by:

Maximum datafile size = db_block_size * maximum number of blocks

The maximum amount of data in an Oracle database is calculated by:


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
 

See the Oracle script collection::
 


 

 
 
 

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