Glad to see you're using http://splainer.io! I recognize those explains! (let me know if you have any ideas/thoughts/questions/criticisms I created the thing).
Some thoughts - You might consider using ps2 or ps3 to add a slop to the two word and three word phrase searches. Slop adds a less strict positional tolerance. This would help get RER paired with Saint in your other document, and effectively eliminate the coord. , though at a lower score (1 / position difference IIRC) - Have you tried sending "disableCoord" to Solr? I usually leave coord on, as I consider it useful to bias towards more matches. But that option exists. - Using pf2 and pf3 together means that 3 word phrase matches will get counted twice. Once as a three word phrase match. Again as multiple 2 word phrase matches. I usually just stick with pf2. Best! -Doug On Thu, Apr 28, 2016 at 11:32 AM elisabeth benoit <elisaelisael...@gmail.com> wrote: > Hello all, > > I am using Solr 4.10.1. I use edismax, with pf2 to boost documents starting > with. I use a start with token (bzzzz) automatically added at index time, > and added in request at query time. > > I have a problem at this point. > > request is *q=bzzzz saint denis rer* > > the start with field is name_sw > > first document *name_sw: Saint-Denis-Université* > second document *name_sw: RER Saint-Denis* > > So one will have the pf2 starts with boost and not the other. The problem > is that it has an effect on the scoring of pf2 for all other words. > > In other words, my problem is the proximity between "saint" and "denis" is > not scored the same value for those two documents. > > From what I get this is because of the coord scoring factor used for pf2. > > In explain output, for first document > > 0.52612317 Matches Punished by 0.6666667 (not all query terms matched) > 0.78918475 Sum of the following: > 0.39459237 names_sw:"bzzzz saint"^0.21 > > 0.39459237 Dismax (take winner of below) > 0.39459237 names_sw:"saint denis"^0.21 > > 0.37580228 catchall:"saint den"^0.2 > > > *So here, matches punished by 0.66*, which corresponds to coord(2/3) > > and final score pf2 for proximity between saint and denis > > 0.263061593153079 names_sw:"saint denis"^0.21 > > > In explain output, for second document > > > 0.13153079 Matches Punished by 0.33333334 (not all query terms matched) > 0.39459237 Dismax (take winner of below) > 0.39459237 names_sw:"saint denis"^0.21 > > 0.37580228 catchall:"saint den"^0.2 > > > *So here matches punished by 0.33*, which corresponds to coord(1/3) > > and final score pf2 for proximity between saint and denis > > 0.1315307926306158 names_sw:"saint denis"^0.21 > > > I would like to deactivate coord for pf2 pf3. Does anyone know how I > could do this? > > > Best regards, > > Elisabeth >
