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From Yonik Seeley <yonik.see...@lucidimagination.com>
Subject Re: debugQuery different score for same query. dismax
Date Mon, 05 Oct 2009 16:22:49 GMT
On Mon, Oct 5, 2009 at 4:42 AM, Julian Davchev <jmut@drun.net> wrote:
> Well,
> Any explanation why I get different scores then?

I didn't have enough context to see if anything was wrong... by
"different scores" do you mean that the debugQuery scores don't match
with the scores in the main document list?  That would be a bug.

But I suspect you just mean that different documents score
differently... that's what is supposed to happen.
In your diff, I see a different fieldNorm factor, which probably means
that the length of the fields are just different.

Sure enough, that explains the different scores:
3.7137468 * .375 / .4375 = 3.1832115

If you don't want length normalization for this field, turn it off by
setting omitNorms=true

-Yonik
http://www.lucidimagination.com



> Yonik Seeley wrote:
>> On Fri, Oct 2, 2009 at 8:16 AM, Julian Davchev <jmut@drun.net> wrote:
>>
>>> It looks for "pari"   in   ancestorName  field   but first row looks in
>>> 241135 records
>>> and the second row it's just 187821 records.
>>>
>>
>> The "in 241135" is just saying that this match is in document #241135.
>>
>> -Yonik
>> http://www.lucidimagination.com
>>
>>
>>
>>>  Which in results give
>>> lower score for the second row.
>>>
>>> Question is what is affecting this thingy cause I would expect same
>>> fieldname same value to give same score.
>>>
>>> It's dismax query...I skipped showing scoring of other fields to simplify.
>>>
>>> Cheers
>>>
>>>
>>> -3.7137468 = (MATCH) weight(ancestorName:pari^35.0 in 241135), product of:
>>> +3.1832116 = (MATCH) weight(ancestorName:pari^35.0 in 187821), product of:
>>>  0.99998593 = queryWeight(ancestorName:pari^35.0), product of:
>>>     35.0 = boost
>>>  8.488684 = idf(docFreq=148, numDocs=74979)
>>>     0.0033657781 = queryNorm
>>> -    3.713799 = (MATCH) fieldWeight(ancestorName:pari in 241135),
>>> product of:
>>> +    3.1832564 = (MATCH) fieldWeight(ancestorName:pari in 187821),
>>> product of:
>>>     1.0 = tf(termFreq(ancestorName:pari)=1)
>>>     8.488684 = idf(docFreq=148, numDocs=74979)
>>> -0.4375 = fieldNorm(field=ancestorName, doc=241135)
>>> +0.375 = fieldNorm(field=ancestorName, doc=187821)
>>>
>>>
>
>

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