Hi,
I am seeing an issue I do not understand and hope that someone can shed some
light on this. The issue is that for a particular search we are seeing a
particular result rank in position 3 on one machine and position 8 on the
production machine. The position 3 is our desired and roughly expected ranking.
I have a local machine with solr and a version deployed on a production server.
My local machine's solr and the production version are both checked out from
our project's SVN trunk. They are identical files except for the data files
(not in SVN) and database connection settings.
The index is populated exclusively via data import handler queries to a
database.
I have exported the production database as-is to my local development machine
so that my local machine and production have access to the self same data.
I execute a total full-import on both.
Still, I see a different position for this document that should surely rank in
the same location, all else being equal.
I ran debugQuery diff to see how the scores were being computed. See appendix
at foot of this email.
As far as I can tell every single query normalisation block of the debug is
marginally different, e.g.
- 0.021368012 = queryNorm (local)
+ 0.009944122 = queryNorm (production)
Which leads to a final score of -2 versus +1 which is enough to skew the
results from correct to incorrect (in terms of what we expect to see).
- -2.286596 (local)
+1.0651637 = (production)
I cannot explain this difference. The database is the same. The configuration
is the same. I have fully imported from scratch on both servers. What am I
missing?
Thank you for your time
Allistair
----- snip
APPENDIX - debugQuery=on DIFF
--- untitled
+++ (clipboard)
@@ -1,51 +1,49 @@
-<str name="L12411p">
+<str name="L12411">
-2.286596 = (MATCH) sum of:
- 1.6891675 = (MATCH) sum of:
- 1.3198489 = (MATCH) max plus 0.01 times others of:
- 0.023022119 = (MATCH) weight(text:dubai^0.1 in 1551), product of:
- 0.011795795 = queryWeight(text:dubai^0.1), product of:
- 0.1 = boost
+1.0651637 = (MATCH) sum of:
+ 0.7871359 = (MATCH) sum of:
+ 0.6151879 = (MATCH) max plus 0.01 times others of:
+ 0.10713901 = (MATCH) weight(text:dubai in 1551), product of:
+ 0.05489459 = queryWeight(text:dubai), product of:
5.520305 = idf(docFreq=65, maxDocs=6063)
- 0.021368012 = queryNorm
+ 0.009944122 = queryNorm
1.9517226 = (MATCH) fieldWeight(text:dubai in 1551), product of:
1.4142135 = tf(termFreq(text:dubai)=2)
5.520305 = idf(docFreq=65, maxDocs=6063)
0.25 = fieldNorm(field=text, doc=1551)
- 1.3196187 = (MATCH) weight(profile:dubai^2.0 in 1551), product of:
- 0.32609802 = queryWeight(profile:dubai^2.0), product of:
+ 0.6141165 = (MATCH) weight(profile:dubai^2.0 in 1551), product of:
+ 0.15175761 = queryWeight(profile:dubai^2.0), product of:
2.0 = boost
7.6305184 = idf(docFreq=7, maxDocs=6063)
- 0.021368012 = queryNorm
+ 0.009944122 = queryNorm
4.0466933 = (MATCH) fieldWeight(profile:dubai in 1551), product of:
1.4142135 = tf(termFreq(profile:dubai)=2)
7.6305184 = idf(docFreq=7, maxDocs=6063)
0.375 = fieldNorm(field=profile, doc=1551)
- 0.36931866 = (MATCH) max plus 0.01 times others of:
- 0.0018293816 = (MATCH) weight(text:product^0.1 in 1551), product of:
- 0.003954251 = queryWeight(text:product^0.1), product of:
- 0.1 = boost
+ 0.17194802 = (MATCH) max plus 0.01 times others of:
+ 0.00851347 = (MATCH) weight(text:product in 1551), product of:
+ 0.018402064 = queryWeight(text:product), product of:
1.8505468 = idf(docFreq=2589, maxDocs=6063)
- 0.021368012 = queryNorm
+ 0.009944122 = queryNorm
0.4626367 = (MATCH) fieldWeight(text:product in 1551), product of:
1.0 = tf(termFreq(text:product)=1)
1.8505468 = idf(docFreq=2589, maxDocs=6063)
0.25 = fieldNorm(field=text, doc=1551)
- 0.36930037 = (MATCH) weight(profile:product^2.0 in 1551), product of:
- 0.1725098 = queryWeight(profile:product^2.0), product of:
+ 0.17186289 = (MATCH) weight(profile:product^2.0 in 1551), product of:
+ 0.08028162 = queryWeight(profile:product^2.0), product of:
2.0 = boost
4.036637 = idf(docFreq=290, maxDocs=6063)
- 0.021368012 = queryNorm
+ 0.009944122 = queryNorm
2.14075 = (MATCH) fieldWeight(profile:product in 1551), product of:
1.4142135 = tf(termFreq(profile:product)=2)
4.036637 = idf(docFreq=290, maxDocs=6063)
0.375 = fieldNorm(field=profile, doc=1551)
- 0.59742856 = (MATCH) max plus 0.01 times others of:
- 0.59742856 = weight(profile:"dubai product"~10^0.5 in 1551), product of:
- 0.12465195 = queryWeight(profile:"dubai product"~10^0.5), product of:
+ 0.27802786 = (MATCH) max plus 0.01 times others of:
+ 0.27802786 = weight(profile:"dubai product"~10^0.5 in 1551), product of:
+ 0.05800981 = queryWeight(profile:"dubai product"~10^0.5), product of:
0.5 = boost
11.667155 = idf(profile: dubai=7 product=290)
- 0.021368012 = queryNorm
+ 0.009944122 = queryNorm
4.7927732 = fieldWeight(profile:"dubai product" in 1551), product of:
1.0954452 = tf(phraseFreq=1.2)
11.667155 = idf(profile: dubai=7 product=290)
