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From Mike Klaas <mike.kl...@gmail.com>
Subject Re: field normalization and omitNorms
Date Wed, 28 May 2008 23:38:37 GMT

On 27-May-08, at 3:16 PM, Phillip Farber wrote:

>
> Hi all,
>
> I've been looking without success for a simple explanation of the  
> effect of omitNorms=false for a text field. Can someone point me to  
> the relevant doc?

The length of the field, as well as field and document boosts, will  
not affect the doc score.  This is usually a bad thing for fields of  
variable length.

>
> What is the effect of omitNorms=false on index size and query  
> performance for say 200K documents that have s single large text  
> field that ranges from maybe 30K up to around 800K?  Do I want  
> omitNorms=true or false?

200K bytes, no effect on performance (unless you are livin' on a crazy  
memory edge).

-Mike

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