With many other coding that happened in 2.9, e.g. the PQ api etc., sorting is actually faster than 2.4. -John
On Thu, Oct 22, 2009 at 5:07 AM, Mark Miller <markrmil...@gmail.com> wrote: > Bill Au wrote: > > Since Lucene 2.9 has per segment searching/caching, does query > performance > > degrade less than before (2.9) as more segments are added to the index? > > Bill > > > > > I think non sorting cases are actually faster now over multiple segments > - though you will still see performance degrade pretty signif. over a > single segment (I've measured even 5 segments as being 15-20% slower). > Doesn't really help the degrade, but should be faster at each point. > > Sorting is a bit different - you have to convert the p-queue as you go > from segment to segment - so the more segments (which also generally > means more larger segments), the more conversion you have to do. This > didn't appear to be to bad unless you got up to quite a few segments . > Worse degradation though. > > -- > - Mark > > http://www.lucidimagination.com > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > >
