On Fri, Apr 10, 2009 at 3:11 PM, Mark Miller <markrmil...@gmail.com> wrote: > Mark Miller wrote: >> >> Michael McCandless wrote: >>> >>> which is why I'm baffled that Raf didn't see a speedup on >>> upgrading. >>> >>> Mike >>> >> >> Another point is that he may not have such a nasty set of segments - Raf >> says he has 24 indexes, which sounds like he may not have the logarithmic >> sizing you normally see. If you have somewhat normal term distribution for >> all 24 segments, the problem is not exasperated nearly as much (along with >> not being so bad as its not using all of the terms for the field). > > Better clarify this: it will still be a problem - you still have all the > extra seeks - but they are not as many wasted seeks that we can avoid like > the problem with the tailed logarithmic segments.
Right, I think "uniqueness" of terms may be the driving factor. So, if segment sizes are all the same (no logarithmic tail), but terms are very unique, you'll still have N-1 SegmentTermEnums trying to seek to a term that they don't have. Mike --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
