I have some fields I facet on that are TextFields but have just a single token.
The fieldType looks like this:
<fieldType name="myStringFieldType" class="solr.TextField" indexed="true"
stored="false" omitNorms="true" sortMissingLast="true"
positionIncrementGap="100">
<analyzer>
<tokenizer class="solr.KeywordTokenizerFactory"/>
</analyzer>
</fieldType>
SimpleFacets uses an UnInvertedField for these fields because
multiValuedFieldCache() returns true for TextField. I tried changing the type
for
these fields to the plain "string" type (StrField). The facets *seem* to be
generated much faster. Is it expected that FieldCache would be faster than
UnInvertedField for single-token strings like this?
My goal is to make the facet re-generation after a commit as fast as possible. I
would like to continue using TextField for these fields since I have a need for
filters like LowerCaseFilterFactory, which still produces a single token. Is it
safe to extend TextField and have multiValuedFieldCache() return false for these
fields, so that UnInvertedField is not used? Or is there a better way to
accomplish what I'm trying to do?
-Michael
