On Sat, Mar 16, 2013 at 12:02 AM, Scott Smith <ssm...@mainstreamdata.com> wrote: > " Do you always close IndexWriter after adding few documents and when > closing, disable "wait for merge"? In that case, all merges are interrupted > and the merge policy never has a chance to merge at all (because you are > opening and closing IndexWriter all the time with cancelling all merges)?" > > Frankly I don't quite understand what this means. When I "close" the > indexwriter, I simply call close(). Is that the wrong thing? that should be fine...
this sounds very odd though, do you see file that get actually removed / merged if you call IndexWriter#forceMerge(1) simon > > Thanks > > Scott > > -----Original Message----- > From: Uwe Schindler [mailto:u...@thetaphi.de] > Sent: Friday, March 15, 2013 4:49 PM > To: java-user@lucene.apache.org > Subject: RE: Lucene slow performance > > Hi, > > with standard configuartion, this cannot happen. What merge policy do you > use? This looks to me like a misconfigured merge policy or using the > NoMergePolicy. With 3,000 segments, it will be slow, the question is, why do > you get those? > > Another thing could be: Do you always close IndexWriter after adding few > documents and when closing, disable "wait for merge"? In that case, all > merges are interrupted and the merge policy never has a chance to merge at > all (because you are opening and closing IndexWriter all the time with > cancelling all merges)? > > Uwe > > ----- > Uwe Schindler > H.-H.-Meier-Allee 63, D-28213 Bremen > http://www.thetaphi.de > eMail: u...@thetaphi.de > >> -----Original Message----- >> From: Scott Smith [mailto:ssm...@mainstreamdata.com] >> Sent: Friday, March 15, 2013 11:15 PM >> To: java-user@lucene.apache.org >> Subject: Lucene slow performance >> >> We have a system that is using lucene and the searches are very slow. >> The number of documents is fairly small (less than 30,000) and each >> document is typically only 2 to 10 kilo-characters. Yet, searches are >> taking 15-16 seconds. >> >> One of the things I noticed was that the index directory has several >> thousand >> (3000+) .cfs files. We do optimize the index once per day. This is a >> system that probably gets several thousand document deletes and >> additions per day (spread out across the day). >> >> Any thoughts. We didn't really notice this until we went to 4.x. >> >> Scott >> > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
