The search with the filter takes longer than a search for the same term but no filter after repeated searches, after the cache should have come into play. To be more specific, this happens on filters that exclude very few results from the overall set.
For instance, type:video returns few results and as one would expect, returns much quicker than a search without that filter. -type:video, on the other hand returns a lot of results and excludes very few, and actually takes longer than a search without any filter at all. Is this what one might expect when using a filter that excludes few results, or does it still seem like something strange might be happening? Thanks, Matt -----Original Message----- From: Geert-Jan Brits [mailto:gbr...@gmail.com] Sent: Wednesday, August 11, 2010 2:55 PM To: solr-user@lucene.apache.org Subject: Re: Filter Performance in Solr 1.3 fq's are the preferred way to use for filtering when the same filter is often used. (since the filter-set can be cached seperately) . as to your direct question: > My question is whether there is anything that can be done in 1.3 to help alleviate the problem, before upgrading to 1.4? I don't think so (perhaps some patches that I'm not aware of) . When are you seeing increased search time? is it the first time the filter is used? If that's the case: that's logical since the filter needs to be build. (fq)-filters only show their strength (as said above) when you use them repeatedly. If on the other hand you're seeing slower repsonse times with a fq-filter applied all the time, then the same queries without the fq-filter, there must be something strange going on since this really shouldn't happen in normal situations. Geert-Jan 2010/8/11 Bargar, Matthew B <matthew.bar...@verizonwireless.com> > Hi there, I have a question about filter (fq) performance in Solr 1.3. > After doing some testing it seems as though adding a filter increases > search time. From what I've read here > http://www.derivante.com/2009/06/23/solr-filtering-performance-increas > e/ > > and here > http://www.lucidimagination.com/blog/2009/05/27/filtered-query-perform > an > ce-increases-for-solr-14/ > > it seems as though upgrading to 1.4 would solve this problem. My > question is whether there is anything that can be done in 1.3 to help > alleviate the problem, before upgrading to 1.4? It becomes an issue > because the majority of searches that are done on our site need some > content type excluded or filtered for. Does it make sense to use the > fq parameter in this way, or is there some better approach since > filters are almost always used? > > Thank you! >
