OK. Then it's likely not this. You saw the other response about looking at GC to see if maybe that hits you once in a while and slows whatever queries are in flight? Try jconsole.
Otis -- Sematext -- http://sematext.com/ -- Lucene - Solr - Nutch ----- Original Message ---- > From: oleg_gnatovskiy <oleg_gnatovs...@citysearch.com> > To: solr-user@lucene.apache.org > Sent: Thursday, January 22, 2009 2:43:31 PM > Subject: Re: Query Performance while updating teh index > > > We do optimize the index before updates but we get tehse performance issues > even when we pull an empty snapshot. Thus even when our update is tiny, the > performance issues still happen. > > > > Otis Gospodnetic wrote: > > > > This is an old and long thread, and I no longer recall what the specific > > suggestions were. > > My guess is this has to do with the OS cache of your index files. When > > you make the large index update, that OS cache is useless (old files are > > gone, new ones are in) and the OS cache has get re-warmed and this takes > > time. > > > > Are you optimizing your index before the update? Do you *really* need to > > do that? > > How large is your update, what makes it big, and could you make it > > smaller? > > > > Otis > > -- > > Sematext -- http://sematext.com/ -- Lucene - Solr - Nutch > > > > > > > > ----- Original Message ---- > >> From: oleg_gnatovskiy > >> To: solr-user@lucene.apache.org > >> Sent: Tuesday, January 20, 2009 6:19:46 PM > >> Subject: Re: Query Performance while updating teh index > >> > >> > >> Hello again. It seems that we are still having these problems. Queries > >> take > >> as long as 20 minutes to get back to their average response time after a > >> large index update, so it doesn't seem like the problem is the 12 second > >> autowarm time. Are there any more suggestions for things we can try? > >> Taking > >> our servers out of teh loop for as long as 20 minutes is a bit of a > >> hassle, > >> and a risk. > >> -- > >> View this message in context: > >> > http://www.nabble.com/Query-Performance-while-updating-the-index-tp20452835p21573927.html > >> Sent from the Solr - User mailing list archive at Nabble.com. > > > > > > > > -- > View this message in context: > http://www.nabble.com/Query-Performance-while-updating-the-index-tp20452835p21611642.html > Sent from the Solr - User mailing list archive at Nabble.com.
