Rebuild btree index myth ?
DBAsupport.com Forums - Powered by vBulletin
Results 1 to 6 of 6

Thread: Rebuild btree index myth ?

  1. #1
    Join Date
    May 2005
    Posts
    129

    Rebuild btree index myth ?

    This PDF by Richard Foote uses quotes from Burleson and Niemec which he disagrees with and considers 'myths'.

    Rebuilding The Truth

    http://www.actoug.org.au/Downloads/o..._internals.pdf

    The vast majority of indexes do not require rebuilding

    Oracle B-tree indexes can become “unbalanced” and
    need to be rebuilt is a myth

    Deleted space in an index is “deadwood” and over time
    requires the index to be rebuilt is a myth

    If an index reaches “x” number of levels, it becomes
    inefficient and requires the index to be rebuilt is a myth

    If an index has a poor clustering factor, the index needs
    to be rebuilt is a myth

    To improve performance, indexes need to be regularly
    rebuilt is a myth

  2. #2
    Join Date
    Sep 2002
    Location
    England
    Posts
    7,333
    unless you have a question in there - its all correct

  3. #3
    Join Date
    Aug 2002
    Location
    Colorado Springs
    Posts
    5,253
    Jonathan Lewis just wrote something on that also ... http://www.jlcomp.demon.co.uk/indexes_i.html
    David Aldridge,
    "The Oracle Sponge"

    Senior Manager, Business Intelligence Development
    XM Satellite Radio
    Washington, DC

    Oracle ACE

  4. #4
    Join Date
    Nov 2004
    Location
    Mumbai, India
    Posts
    452
    And I thought the war was over.
    There are three kinds of lies: Lies, damned lies, and benchmarks...

    Unix is user friendly. It's just very particular about who it's friends are.

    Oracle DBA

  5. #5
    Join Date
    Aug 2002
    Location
    Colorado Springs
    Posts
    5,253
    Originally posted by simply_dba
    And I thought the war was over.
    It's been downgraded to a Police Action.
    David Aldridge,
    "The Oracle Sponge"

    Senior Manager, Business Intelligence Development
    XM Satellite Radio
    Washington, DC

    Oracle ACE

  6. #6
    Join Date
    Nov 2004
    Location
    Mumbai, India
    Posts
    452
    So, everybody is doing the "post mortem" of their own
    There are three kinds of lies: Lies, damned lies, and benchmarks...

    Unix is user friendly. It's just very particular about who it's friends are.

    Oracle DBA

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


Click Here to Expand Forum to Full Width