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From Robert Jordan <>
Subject Re: lucene performance questions
Date Tue, 18 May 2010 14:39:40 GMT
On 18.05.2010 15:33, Ravi Patel wrote:
> Two Questions:
> 1.  Is there a cost at search-time in making fields Tokenized that
> don't need to be?  I assume there's a cost at Index time, but I'm not
> too worried about the Index cost.

Which analyzer are your using at index time?

> 2.  Should fields that are used in my 3 example lines above by
> Tokenized?  If not, why am I seeing a huge performance difference
> when they are UnTokenized?  I'm really not running any queries that
> require some sort of analysis on these fields other than that they
> are indexed as-s

They should not be tokenized/analyzed, but this is highly dependent
on the analyzer.

In general, an ID-like field is never tokenized, unless the analyzer
is a bijective function.


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