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
