On Saturday 14 March 2009 13:38:16 Niels Ott wrote: > Hi all, > > I'm working on my prototype system and it turns out that RangeQueries > are quite slow. In a first test I have about 80.000 documents in my > index and I combine two range queries with a normal text query using the > BooleanQuery. > > On the long run I will need to enhance my index at indexing-time so that > the range queries will be substituted by simple keywords.
Perhaps that is avoidable, see the reference below. > For now, I'm interested in a possibility to speed up range queries. Does > the performance of a range query depend on the length of contents in the > field in question? Performance normally mostly depends on the number of terms indexed within the queried range. To limit the number of terms used during a range search, have a look here for more info on the new TrieRangeQuery: http://wiki.apache.org/lucene-java/SearchNumericalFields Regards, Paul Elschot
