Discussions
Categories
- 196.7K All Categories
- 2.2K Data
- 235 Big Data Appliance
- 1.9K Data Science
- 449.8K Databases
- 221.5K General Database Discussions
- 3.8K Java and JavaScript in the Database
- 31 Multilingual Engine
- 549 MySQL Community Space
- 477 NoSQL Database
- 7.9K Oracle Database Express Edition (XE)
- 3K ORDS, SODA & JSON in the Database
- 532 SQLcl
- 4K SQL Developer Data Modeler
- 186.8K SQL & PL/SQL
- 21.3K SQL Developer
- 295.4K Development
- 17 Developer Projects
- 138 Programming Languages
- 292.1K Development Tools
- 104 DevOps
- 3.1K QA/Testing
- 645.9K Java
- 28 Java Learning Subscription
- 37K Database Connectivity
- 153 Java Community Process
- 105 Java 25
- 22.1K Java APIs
- 138.1K Java Development Tools
- 165.3K Java EE (Java Enterprise Edition)
- 17 Java Essentials
- 158 Java 8 Questions
- 85.9K Java Programming
- 79 Java Puzzle Ball
- 65.1K New To Java
- 1.7K Training / Learning / Certification
- 13.8K Java HotSpot Virtual Machine
- 94.2K Java SE
- 13.8K Java Security
- 203 Java User Groups
- 24 JavaScript - Nashorn
- Programs
- 394 LiveLabs
- 37 Workshops
- 10.2K Software
- 6.7K Berkeley DB Family
- 3.5K JHeadstart
- 5.6K Other Languages
- 2.3K Chinese
- 170 Deutsche Oracle Community
- 1.1K Español
- 1.9K Japanese
- 230 Portuguese
index rebuilding process
Answers
-
Oldeolthof wrote:The general point is correct - Oracle creates a segment of type "temorary" in the target tablespace, uses the space for a new version of the index, then renames the temporary segment and drops the old index. But it could do an index full scan, an index fast full scan, or a tablescan to collect the data that allows it to create the new index.
Oracle reads the existing index in sorted order quickly creating a new index in temp degment and renaming the temp segments to the index after sucessful completion.
Regards
Jonathan Lewis
http://jonathanlewis.wordpress.com
http://www.jlcomp.demon.co.uk
"Science is more than a body of knowledge; it is a way of thinking" Carl Sagan -
hi Jonathan,
nice to see your post, i would like to ask one question to you that does index rebuilding process cause movement of data in database??
its known that more space will be required because redo will generated... but if db require recovery will DB ask for these archive log then??
how much time it take to delete old segment after rebuilding the index??
your post is always helpful.
thanks and regards
VD
Edited by: vikrant dixit on Jan 22, 2009 3:17 AM
This discussion has been closed.