Keep digging, this is interesting ;) D.
On Tue, Dec 11, 2012 at 6:33 AM, Greg Bowyer <gbow...@fastmail.co.uk> wrote: > Since its too long (and has too much HTML and pictures and such forth) > for the mailing list I have a more detailed write up here > > http://people.apache.org/~gbowyer/madvise-perf/index.html > > However the short version. > > At $DAYJOB as part of moving to lucene 4.0 I have been looking at what > we can change in our modes of thinking, on of these relates (for us) to > having a separate legacy system that serves the stored data for the > search engine (which we imaginatively call docserve). > > Whilst playing with this I noticed that I lost a lot of performance > rather quickly, after a lot of digging it looks like getting a call in > mmaping to madvise (specifically a call of the form madvise(addr, > MADV_WILLNEED) might improve search performance. > > Anyone have any thoughts and or ideas here, I am going to try to get a > whole heap more investigation done before I start messing with lucene's > behavior on mmap (because whilst it improves /my/ performance a lot it > might be I only noticed it since I am poking an open-wound YMMV), but > there is something of interest here. > > Then again this might be my own personal insanity .. :S > > -- Greg > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org > For additional commands, e-mail: dev-h...@lucene.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org
