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From Apache Wiki <>
Subject [Solr Wiki] Update of "FilterQueryGuidance" by MichaelLudwig
Date Fri, 12 Jun 2009 16:49:32 GMT
Dear Wiki user,

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The following page has been changed by MichaelLudwig:

The comment on the change is:
distinction: facet queries vs. facet fields

  If, however, (c) was specified using two distinct `fq` parameters `x:bla` and `y:blub`
  I'd end up with only two distinct filters for (a), (b) and (c).
- Note that [:SolrFacetingOverview: faceting] also uses filters under the hood.
+ Note that [:SolrFacetingOverview: faceting]
+ by [:SimpleFacetParameters#facet.query: facet queries]
+ (but not by [:SimpleFacetParameters#facet.field: facet fields])
+ also uses filters under the hood.
- In fact, facets are just an application of filtering.
+ In fact, facet queries are just an application of filtering.
  So take that information into account
  when thinking about what could be a good value for `filterCache/@size`.
@@ -161, +164 @@

  If there any accounting of which cache entries are getting the most or most recent hits?
  A good question, which remains to be answered.
+ == Further reading ==
+ More information on filters (and other topics) can be gleaned from a lengthy, but very good
+ [
article on scaling Lucene and Solr].

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