Hi, If you are using StandardAnalyzer, then "Cla$$War" is split at the $ signs, so it searches for two tokens, "cla" and "war". If autogenerate phrase queries is enabled for QueryParser, it will then create a phrase query "cla war" out of it, which is slower because positions are involved. If autogenerate phrases is not enabled, Lucene still have to search for 2 terms, so it might get slower, if "cla" or "war" hit many documents. If it is enabled or not depends on the matchVersion parameter passed to ctor: http://lucene.apache.org/core/3_6_1/api/core/org/apache/lucene/queryParser/Q ueryParser.html
Uwe ----- Uwe Schindler H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de eMail: u...@thetaphi.de > -----Original Message----- > From: Ian Lea [mailto:ian....@gmail.com] > Sent: Tuesday, August 14, 2012 10:39 AM > To: java-user@lucene.apache.org > Subject: Re: Does the string "Cla$$War" affect Lucene? > > Sounds extremely unlikely. What is the query? What analyzer? What version of > lucene? What about other strings containing $$? > > > -- > Ian. > > > On Tue, Aug 14, 2012 at 9:13 AM, zhoucheng2008 > <zhoucheng2...@gmail.com> wrote: > > Hi, > > > > > > I have a big index, and when I searched it with a title string "Cla$$War", > Lucene became very slow. It doesn't happen when I searched with other title > string such as "Gone with Wind". Does the "$$" affect the search performance? > > > > > > Thanks, > > Cheng > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
