I took 1.4 from trunk three days ago, it seems Ok for production (at least for my Master instance which is doing writes-only). I use the same config files.
500 000 terms are Ok too; I am using several millions with pre-1.3 SOLR taken from trunk. However, do not try to "facet" (probably outdated term after SOLR-475) on generic queries such as [* TO *] (with huge resultset). For smaller query results (100,000 instead of 100,000,000) "counting terms" is fast enough (few milliseconds at http://www.tokenizer.org) -----Original Message----- From: Jérôme Etévé [mailto:jerome.et...@gmail.com] Sent: August-13-09 5:38 AM To: solr-user@lucene.apache.org Subject: Re: facet performance tips Thanks everyone for your advices. I increased my filterCache, and the faceting performances improved greatly. My faceted field can have at the moment ~40000 different terms, so I did set a filterCache size of 50000 and it works very well. However, I'm planning to increase the number of terms to maybe around 500 000, so I guess this approach won't work anymore, as I doubt a 500 000 sized fieldCache would work. So I guess my best move would be to upgrade to the soon to be 1.4 version of solr to benefit from its new faceting method. I know this is a bit off-topic, but do you have a rough idea about when 1.4 will be an official release? As well, is the current trunk OK for production? Is it compatible with 1.3 configuration files? Thanks ! Jerome. 2009/8/13 Stephen Duncan Jr <stephen.dun...@gmail.com>: > Note that depending on the profile of your field (full text and how many > unique terms on average per document), the improvements from 1.4 may not > apply, as you may exceed the limits of the new faceting technique in Solr > 1.4. > -Stephen > > On Wed, Aug 12, 2009 at 2:12 PM, Erik Hatcher <ehatc...@apache.org> wrote: > >> Yes, increasing the filterCache size will help with Solr 1.3 performance. >> >> Do note that trunk (soon Solr 1.4) has dramatically improved faceting >> performance. >> >> Erik >> >> >> On Aug 12, 2009, at 1:30 PM, Jérôme Etévé wrote: >> >> Hi everyone, >>> >>> I'm using some faceting on a solr index containing ~ 160K documents. >>> I perform facets on multivalued string fields. The number of possible >>> different values is quite large. >>> >>> Enabling facets degrades the performance by a factor 3. >>> >>> Because I'm using solr 1.3, I guess the facetting makes use of the >>> filter cache to work. My filterCache is set >>> to a size of 2048. I also noticed in my solr stats a very small ratio >>> of cache hit (~ 0.01%). >>> >>> Can it be the reason why the faceting is slow? Does it make sense to >>> increase the filterCache size so it matches more or less the number >>> of different possible values for the faceted fields? Would that not >>> make the memory usage explode? >>> >>> Thanks for your help ! >>> >>> -- >>> Jerome Eteve. >>> >>> Chat with me live at http://www.eteve.net >>> >>> jer...@eteve.net >>> >> >> > > > -- > Stephen Duncan Jr > www.stephenduncanjr.com > -- Jerome Eteve. Chat with me live at http://www.eteve.net jer...@eteve.net
