Apache Solr Reference Guide Covering Apache Solr 6.0

hl.usePhraseHighlighter true If set to true, Solr will highlight phrase queries (and
other advanced position-sensitive queries)
accurately. If false, the parts of the phrase will be
highlighted everywhere instead of only when it forms
the given phrase.
hl.highlightMultiTerm true If set to true, Solr will highlight wildcard queries (and
other MultiTermQuery subclasses). If false, they
won't be highlighted at all.
hl.regex.slop 0.6 When using the regex fragmenter (hl.fragmenter
=regex), this parameter defines the factor by which
the fragmenter can stray from the ideal fragment
size (given by hl.fragsize) to accommodate a
regular expression. For instance, a slop of 0.2 with h
l.fragsize=100 should yield fragments between
80 and 120 characters in length.
It is usually good to provide a slightly smaller hl.fr
agsize value when using the regex fragmenter.
hl.regex.pattern blank Specifies the regular expression for fragmenting.
This could be used to extract sentences.
hl.regex.maxAnalyzedChars 10000 Instructs Solr to analyze only this many characters
from a field when using the regex fragmenter (after
which, the fragmenter produces fixed-sized
fragments). Applying a complicated regex to a huge
field is computationally expensive.
hl.preserveMulti false If true, multi-valued fields will return all values in the
order they were saved in the index. If false, only
values that match the highlight request will be
returned.
hl.payloads (automatic) When hl.usePhraseHighlighter is true and the
indexed field has payloads but not term vectors
(generally quite rare), the index's payloads will be
read into the highlighter's memory index along with
the postings. If this may happen and you know you
don't need them for highlighting (i.e. your queries
don't filter by payload) then you can save a little
memory by setting this to false.
Related Content
HighlightingParameters from the Solr wiki
Highlighting javadocs
FastVector Highlighter
The FastVectorHighlighter is a TermVector-based highlighter that offers higher performance than the standard
highlighter in many cases. To use the FastVectorHighlighter, set the hl.useFastVectorHighlighter param
eter to true.
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