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From "Yonik Seeley" <ysee...@gmail.com>
Subject Re: What are norms?
Date Fri, 14 Jul 2006 14:42:04 GMT
On 7/14/06, Rob Staveley (Tom) <rstaveley@seseit.com> wrote:
> I'm trying to reduce the memory requirement of my application that has ~40
> indexed fields. Would I be wasting my time omitting norms in this
> application?
>
> What would I lose by omitting norms? The ability to boost individual fields
> as they are added to the index? Anything else?

Length normalization of the field.  Full-text matches on shorter
fields score higher because the match is seen as more specific.  You
loose that if you omit norms.  That's typically OK for short fields
like "title" anyway, and fields that aren't full-text (like dates,
numbers, etc).

-Yonik
http://incubator.apache.org/solr Solr, the open-source Lucene search server

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