Hi Mike, thank you for your answer. I have downloaded lucene-core-2.9-dev and I have executed my tests (both on multireader and on consolidated index) using this new version, but the performance are very similar to the previous ones. The big index is 7/8 times faster than multireader version.
Raf On Fri, Apr 10, 2009 at 4:48 PM, Michael McCandless < luc...@mikemccandless.com> wrote: > Unfortunately, in Lucene 2.4, any query that needs to enumerate Terms > (Prefix, Wildcard, Range, etc.) has poor performance on Multi*Readers. > I think the only workaround is to merge your indexes down to a single > index. > > But, Lucene trunk (not yet released) has fixed this, so that searching > through your MultiReader should give you the same performance as > searching on a single consolidated index -- if you test this (which > would be awesome!) please report back and let us know how it went. > > Mike > > On Fri, Apr 10, 2009 at 10:38 AM, Raf <r.ventag...@gmail.com> wrote: > > Hi, > > we are experiencing some problems using RangeFilters and we think there > are > > some performance issues caused by MultiReader. > > > > We have more or less 3M documents in 24 indexes and we read all of them > > using a MultiReader. > > If we do a search using only terms, there are no problems, but it if we > add > > to the same search terms a RangeFilter that extracts a large subset of > the > > documents (e.g. 500K), it takes a lot of time to execute (about 15s). > > > > In order to identify the problem, we have tried to consolidate the index: > so > > now we have the same 3M docs in a single 10GB index. > > If we repeat the same search using this index, it takes only a small > > fraction of the previous time (about 2s). > > > > Is there something we can do to improve search performance using > > RangeFilters with MultiReader or the only solution is to have only a > single > > big index? > > > > Thanks, > > Raf > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > >
