Apache Solr Reference Guide Covering Apache Solr 6.0

This parameter can be specified on a per-field basis to apply a distinct limit to each field with the syntax of f.
.facet.limit.
The facet.offset Parameter
The facet.offset parameter indicates an offset into the list of constraints to allow paging.
The default value is 0.
This parameter can be specified on a per-field basis with the syntax of f..facet.offset.
The facet.mincount Parameter
The facet.mincount parameter specifies the minimum counts required for a facet field to be included in
the response. If a field's counts are below the minimum, the field's facet is not returned.
The default value is 0.
This parameter can be specified on a per-field basis with the syntax of f..facet.mincount.
The facet.missing Parameter
If set to true, this parameter indicates that, in addition to the Term-based constraints of a facet field, a count
of all results that match the query but which have no facet value for the field should be computed and
returned in the response.
The default value is false.
This parameter can be specified on a per-field basis with the syntax of f..facet.missing.
The facet.method Parameter
The facet.method parameter selects the type of algorithm or method Solr should use when faceting a field.
Setting
enum
fc
Results
Enumerates all terms in a field, calculating the set intersection of documents that match the term
with documents that match the query. This method is recommended for faceting multi-valued
fields that have only a few distinct values. The average number of values per document does not
matter. For example, faceting on a field with U.S. States such as Alabama, Alaska, ...
Wyoming would lead to fifty cached filters which would be used over and over again. The filte
rCache should be large enough to hold all the cached filters.
Calculates facet counts by iterating over documents that match the query and summing the
terms that appear in each document. This is currently implemented using an UnInvertedField
cache if the field either is multi-valued or is tokenized (according to FieldType.isTokened() )
. Each document is looked up in the cache to see what terms/values it contains, and a tally is
incremented for each value. This method is excellent for situations where the number of indexed
values for the field is high, but the number of values per document is low. For multi-valued fields,
a hybrid approach is used that uses term filters from the filterCache for terms that match
many documents. The letters fc stand for field cache.
fcs Per-segment field faceting for single-valued string fields. Enable with facet.method=fcs and
control the number of threads used with the threads local parameter. This parameter allows
faceting to be faster in the presence of rapid index changes.
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