Hi David, I happen to know CommonTermsQuery added recently. But now sure how to use it.
http://lucene.apache.org/core/4_1_0/queries/org/apache/lucene/queries/CommonTermsQuery.html --- On Thu, 3/21/13, David Parks <david.pa...@frugg.com> wrote: > From: David Parks <david.pa...@frugg.com> > Subject: Slow queries for common terms > To: "solr-user@lucene.apache.org" <solr-user@lucene.apache.org> > Date: Thursday, March 21, 2013, 11:40 AM > I've got a query that takes 15 > seconds to return whenever I have the term "book" in a query > that isn't cached. That's a pretty common term in our search > index. We're indexing about 120 GB of text data. We only > store terms and IDs, no document data, and the disk is > virtually unused, it's all CPU time. > > I haven't done much yet to optimizing and scale solr, as > we're only trying to support a small number of users in a > private beta. I currently only have a couple of gigs of ram > dedicated to Solr (we've ordered more hardware for it, but > it's not in yet). > > I wonder if there's something I can do in the short term to > alleviate the problem. Many searches work great, but these > ones that take 15+ sec are a black eye. I'd be happy with a > short term fix followed in the near future by a more proper > long-term fix. > > If I were to take a stab at this I'd say the following two > are the short and long term solutions: > > * Short: Configure > solr to short-circuit quries, thus reducing query quality, > but guaranteeing a certain response time (I'm ok with this > tradeoff, but is this possible or contains risks I need to > consider more?) > > * Long: Implement > sharding, get more hardware resources for these boxes and > split up the index across multiple servers. > > Am I on track in my thinking here? > Thanks, > David > > My long query: > <?xml version="1.0" encoding="UTF-8"?> > <response> > > <lst name="responseHeader"> > <int name="status">0</int> > <int name="QTime">15464</int> > <lst name="params"> > <str name="debugQuery">true</str> > <str name="indent">true</str> > <str name="q">cook book fourth baby > </str> > <str name="wt">xml</str> > </lst> > </lst> > <result name="response" numFound="91695127" > start="0"> > <doc> > <str > name="id">1004505170125</str> > <long name="facetime">0</long> > <long > name="_version_">1428753459934396420</long></doc> > <doc> > <str > name="id">1005401904542</str> > <long name="facetime">0</long> > <long > name="_version_">1428760446538612739</long></doc> > <doc> > <str > name="id">1003707566177</str> > <long name="facetime">0</long> > <long > name="_version_">1428772178357125123</long></doc> > <doc> > <str > name="id">1000610053924</str> > <long name="facetime">0</long> > <long > name="_version_">1428787238421921794</long></doc> > <doc> > <str > name="id">1000611651986</str> > <long name="facetime">0</long> > <long > name="_version_">1428796273825153026</long></doc> > <doc> > <str > name="id">1001419625706</str> > <long name="facetime">0</long> > <long > name="_version_">1428823418682212355</long></doc> > <doc> > <str > name="id">1004804435353</str> > <long name="facetime">0</long> > <long > name="_version_">1428823070202658818</long></doc> > <doc> > <str > name="id">1000514089336</str> > <long name="facetime">0</long> > <long > name="_version_">1428755943804370945</long></doc> > <doc> > <str > name="id">1000329540261</str> > <long name="facetime">0</long> > <long > name="_version_">1428805063523958786</long></doc> > <doc> > <str > name="id">1001607999738</str> > <long name="facetime">0</long> > <long > name="_version_">1428757460650295298</long></doc> > </result> > <lst name="debug"> > <str name="rawquerystring">cook book fourth > baby > </str> > <str name="querystring">cook book fourth baby > </str> > <str name="parsedquery">all:cook all:book > all:fourth all:babi</str> > <str name="parsedquery_toString">all:cook > all:book all:fourth all:babi</str> > <lst name="explain"> > <str name="1004505170125"> > 10.476225 = (MATCH) product of: > 13.9683 = (MATCH) sum of: > 7.988946 = (MATCH) weight(all:cook in 3428426) > [DefaultSimilarity], result of: > 7.988946 = score(doc=3428426,freq=2.0 = > termFreq=2.0 > ), product of: > 0.5447923 = queryWeight, product > of: > 5.925234 = > idf(docFreq=931212, maxDocs=128248074) > 0.091944434 = queryNorm > 14.664206 = fieldWeight in > 3428426, product of: > 1.4142135 = tf(freq=2.0), > with freq of: > 2.0 = > termFreq=2.0 > 5.925234 = > idf(docFreq=931212, maxDocs=128248074) > 1.75 = > fieldNorm(doc=3428426) > 0.29064935 = (MATCH) weight(all:book in > 3428426) [DefaultSimilarity], result of: > 0.29064935 = score(doc=3428426,freq=1.0 > = termFreq=1.0 > ), product of: > 0.12357436 = queryWeight, > product of: > 1.3440113 = > idf(docFreq=90917737, maxDocs=128248074) > 0.091944434 = queryNorm > 2.3520198 = fieldWeight in > 3428426, product of: > 1.0 = tf(freq=1.0), with > freq of: > 1.0 = > termFreq=1.0 > 1.3440113 = > idf(docFreq=90917737, maxDocs=128248074) > 1.75 = > fieldNorm(doc=3428426) > 5.688705 = (MATCH) weight(all:babi in 3428426) > [DefaultSimilarity], result of: > 5.688705 = score(doc=3428426,freq=1.0 = > termFreq=1.0 > ), product of: > 0.54670167 = queryWeight, > product of: > 5.9460006 = > idf(docFreq=912073, maxDocs=128248074) > 0.091944434 = queryNorm > 10.405501 = fieldWeight in > 3428426, product of: > 1.0 = tf(freq=1.0), with > freq of: > 1.0 = > termFreq=1.0 > 5.9460006 = > idf(docFreq=912073, maxDocs=128248074) > 1.75 = > fieldNorm(doc=3428426) > 0.75 = coord(3/4) > </str> > <str name="1005401904542"> > 10.476225 = (MATCH) product of: > 13.9683 = (MATCH) sum of: > 7.988946 = (MATCH) weight(all:cook in 4132020) > [DefaultSimilarity], result of: > 7.988946 = score(doc=4132020,freq=2.0 = > termFreq=2.0 > ), product of: > 0.5447923 = queryWeight, product > of: > 5.925234 = > idf(docFreq=931212, maxDocs=128248074) > 0.091944434 = queryNorm > 14.664206 = fieldWeight in > 4132020, product of: > 1.4142135 = tf(freq=2.0), > with freq of: > 2.0 = > termFreq=2.0 > 5.925234 = > idf(docFreq=931212, maxDocs=128248074) > 1.75 = > fieldNorm(doc=4132020) > 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