Thanks!
I tried the explain and better understand how the score comes. But still
has question on the IDF score, the IDF in the explain output of my query is:
{
"value": 0.30685282,
"description": "idf(docFreq=1, maxDocs=1)"
}
What does docFreq and maxDocs in above mean? Per the IDF definition, the
score should be affected by the total number of documents in the index, but
seems the value is always 0.30685282 no matter how many docs I inserted to
the index.
On Tuesday, March 10, 2015 at 5:39:56 PM UTC+8, Nhật Quang Phan wrote:
>
> You can enable explain for your query and see how elasticsearch calculates
> score:
>
> {
> "explain": true,
> "query": {
> "match": {
> "title": "xbox"
> }
> }
> }
>
> On Tuesday, March 10, 2015 at 3:15:50 PM UTC+7, Xudong You wrote:
>>
>> I have two documents as follows:
>>
>> 1.
>> {
>> "title":"xbox"
>> }
>>
>> 2.
>> {
>> "title":"xbox xbox xbox"
>> }
>>
>> Then I search the documents with following query:
>> {
>> "query":{"match":{"title":"xbox"}}
>> }
>>
>> ES returns result as follows:
>>
>> {"took":133,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":2,"max_score":0.30685282,
>> "hits":[
>>
>> {"_index":"storetest1","_type":"type","_id":"1","_score":0.30685282,"_source":{"title":"xbox","keywords":["xbox"]}},
>>
>> {"_index":"storetest1","_type":"type","_id":"2","_score":0.26574233,"_source":{"title":"xbox
>>
>> xbox xbox","keywords":["xbox"]}}]}}
>>
>>
>> My question is, why #1 got higher score than #2? I thought #2 is higher
>> than #1, since more xbox appear in title of #1.
>>
>>
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