Hi Simon, > that is what my first guess was and I'm pretty sure that the long time > is taken before the documents get scored. A short prefix can easily > expand to thousands of terms, do you encounter > TooManyClausesExceptions and in turn do you set > BooleanQuery#setMaxClauseCount() to a higher value than 1024? > I wonder if BooleanQuery#setAllowDocsOutOfOrder(true) would give you > any performance hit if you don't care about the order of how the docs > come in. Any idea how many terms your prefix query expands to?
I looked into it and the prefix query we are finding to be slow expands to about 150 terms (and hence we're not getting TooManyClausesExceptions). > one more thing... while I have no idea about your usecase if you don't > care about the score you could you expand the terms yourself just like > PrefixQuery does. I was trying out a few things and if term expansion is limited to about 20 or so the performance becomes okay for us. I will have to try to find some way to limit the expansion for some queries. I'll look into expanding the terms myself as you suggest. Thanks for your help, Len --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
