It was actually our use of the field collapse patch. Once we disabled this the random slow queries went away.
We also added *:* as a warmup query in order to speed up performance after indexing. sunnyfr wrote: > > Hi Oleg > > Did you find a way to pass over this issue ?? > thanks a lot, > > > oleg_gnatovskiy wrote: >> >> Can you expand on this? Mirroring delay on what? >> >> >> >> zayhen wrote: >>> >>> Use multiple boxes, with a mirroring delaay from one to another, like a >>> pipeline. >>> >>> 2009/1/22 oleg_gnatovskiy <oleg_gnatovs...@citysearch.com> >>> >>>> >>>> Well this probably isn't the cause of our random slow queries, but >>>> might be >>>> the cause of the slow queries after pulling a new index. Is there >>>> anything >>>> we could do to reduce the performance hit we take from this happening? >>>> >>>> >>>> >>>> Otis Gospodnetic wrote: >>>> > >>>> > Here is one example: pushing a large newly optimized index onto the >>>> > server. >>>> > >>>> > 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 2:22:51 PM >>>> >> Subject: Re: Random queries extremely slow >>>> >> >>>> >> >>>> >> What are some things that could happen to force files out of the >>>> cache >>>> on >>>> >> a >>>> >> Linux machine? I don't know what kinds of events to look for... >>>> >> >>>> >> >>>> >> >>>> >> >>>> >> yonik wrote: >>>> >> > >>>> >> > On Thu, Jan 22, 2009 at 1:46 PM, oleg_gnatovskiy >>>> >> > wrote: >>>> >> >> Hello. Our production servers are operating relatively smoothly >>>> most >>>> >> of >>>> >> >> the >>>> >> >> time running Solr with 19 million listings. However every once in >>>> a >>>> >> while >>>> >> >> the same query that used to take 100 miliseconds takes 6000. >>>> >> > >>>> >> > Anything else happening on the system that may have forced some of >>>> the >>>> >> > index files out of operating system disk cache at these times? >>>> >> > >>>> >> > -Yonik >>>> >> > >>>> >> > >>>> >> >>>> >> -- >>>> >> View this message in context: >>>> >> >>>> http://www.nabble.com/Random-queries-extremely-slow-tp21610568p21611240.html >>>> >> Sent from the Solr - User mailing list archive at Nabble.com. >>>> > >>>> > >>>> > >>>> >>>> -- >>>> View this message in context: >>>> http://www.nabble.com/Random-queries-extremely-slow-tp21610568p21611454.html >>>> Sent from the Solr - User mailing list archive at Nabble.com. >>>> >>>> >>> >>> >>> -- >>> Alexander Ramos Jardim >>> >>> >>> ----- >>> RPG da Ilha >>> >> >> > > -- View this message in context: http://www.nabble.com/Random-queries-extremely-slow-tp21610568p23043152.html Sent from the Solr - User mailing list archive at Nabble.com.
