I recently upgraded to SOLR 4.10.1 and after that set up the spell
checker which I use for returning suggestions after searches with few
or no results.
When the spellchecker is active, this request handler is used (most of
which is taken from examples I found in the net):
<requestHandler name="standardWithSpell" class="solr.SearchHandler"
default="false">
<lst name="defaults">
<str name="echoParams">explicit</str>
<str name="spellcheck">true</str>
<str name="spellcheck.onlyMorePopular">false</str>
<str name="spellcheck.count">10</str>
<str name="spellcheck.collate">false</str>
<str name="q.alt">*:*</str>
<str name="echoParams">explicit</str>
<int name="rows">50</int>
<str name="fl">*,score</str>
</lst>
<arr name="last-components">
<str>spellcheck</str>
</arr>
</requestHandler>
The search component is configured as follows (again most of it copied
from examples in the net):
<searchComponent name="spellcheck" class="solr.SpellCheckComponent">
<str name="queryAnalyzerFieldType">text</str>
<lst name="spellchecker">
<str name="name">default</str>
<str name="field">text</str>
<str name="classname">solr.DirectSolrSpellChecker</str>
<str name="distanceMeasure">internal</str>
<float name="accuracy">0.3</float>
<int name="maxEdits">2</int>
<int name="minPrefix">1</int>
<int name="maxInspections">5</int>
<int name="minQueryLength">4</int>
<float name="maxQueryFrequency">0.01</float>
<float name="maxQueryFrequency">.01</float>
</lst>
</searchComponent>
With this setup I can get suggestions for misspelled words. The
results on my developer machine were mostly fine, but on the test
system (much larger database, much larger search index) I found it
very hard to get suggestions at all. If for instance I misspell “bank”
as “bnak” I’d expect to get a suggestion for “bank” (since that word
can be found in the index very often).
I’ve played around with maxQueryFrequency and maxQueryFrequency with
no success.
Does anyone see any obvious misconfiguration? Anything that I could try?
Any way I can debug this? (problem is that my application uses the
core API which makes trying out requests through the web interface
does not work)
Any help would be greatly appreciated!
Cheers,
Martin
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