You can safely set it to 0 (default) for solr.Textfield types that you don't do sloppy phrase queries on.
From the schema.xml comments: > The optional positionIncrementGap puts space between multiple fields > of this type on the same document, with the purpose of preventing > false phrase matching across fields. Sloppyness can extend the boundary of a phrase, using a positionIncremenGap (higher than your slop) can negate the sloppyness for multiple fields in the same document. On Tuesday, October 12, 2010 10:56:18 am Paolo Castagna wrote: > Thank you Markus for your quick reply. > Do you have a recommendation|suggestion about positionIncrementGap? > > Paolo > > Markus Jelsma wrote: > > You can omit norms in field that you only facet on. The matrix only lists > > mandatory values for those parameters. > > > > On Tuesday, October 12, 2010 10:15:35 am Paolo Castagna wrote: > >> Hi, > >> I am not completely sure on what's the recommended setting for fields > >> used for faceting regarding omitNorms and potitionIncrementGap. > >> > >> Should I used omitNorms="true"? > >> > >> What about positionIncrementGap? > >> > >> At the moment I have this in my schema.xml: > >> <dynamicField name="*_facet" type="keyword" indexed="true" > >> > >> stored="false" multiValued="true" /> > >> > >> <fieldType name="keyword" class="solr.TextField"> > >> > >> <analyzer class="org.apache.lucene.analysis.KeywordAnalyzer"/> > >> > >> </fieldType> > >> > >> And I was thinking to change to: > >> <dynamicField name="*_facet" type="keyword" indexed="true" > >> > >> stored="false" multiValued="true" omitNorms="true" > >> positionIncrementGap="100" /> > >> > >> There is documentation, but I did not find a definite answer for > >> omitNorms in relation to faceting. > >> > >> "faceting: indexed='true'" > >> > >> -- http://wiki.apache.org/solr/FieldOptionsByUseCase > >> > >> "Only full-text fields or fields that need an index-time boost need > >> > >> norms." > >> > >> http://svn.apache.org/repos/asf/lucene/dev/trunk/solr/example/solr/conf/ > >> sch ema.xml > >> > >> > >> Thank you, > >> Paolo -- Markus Jelsma - CTO - Openindex http://www.linkedin.com/in/markus17 050-8536600 / 06-50258350
