Home Page for the TeradataForum
 

Archives of the TeradataForum

Message Posted: Wed, 07 Nov 2007 @ 19:35:36 GMT


     
  <Prev Next>   <<First <Prev
Next>
Last>>
 


Subj:   Re: Mload: Taking very long time to run
 
From:   Dieter Noeth

Anomy.Anom wrote:

  To change the PI I will have to convince that the same cannot be achieved by using secondary index or any other way. That's why I'd put the whether it can be achieved by some other means.  


  Also, though the table is skewed I want to be sure that there is no way I can improve my mload script.  


If the table is skewed there's a NUPI on it and there probably are lots of rows with the same PI-value. This might result in a huge CPU- overhead for Duplicate Row Checks if the table is a SET table.

Replacing it with a MultiSet table will remove those Dup Checks.


Dieter



     
  <Prev Next>   <<First <Prev
Next>
Last>>
 
 
 
 
 
 
 
 
 
  
  Top Home Privacy Feedback  
 
 
Copyright for the TeradataForum (TDATA-L), Manta BlueSky    
Copyright 2016 - All Rights Reserved    
Last Modified: 15 Jun 2023