Hi Agnieszka , if you don't need number of groups, you can try leaving out group.ngroups=true param. In this case Solr apparently skips calculating all groups and delivers results much faster. At least for our application the difference in performance with/without group.ngroups=true is significant (have to say, we use Solr 3.6).
WBR, Pavel On Mon, Jul 16, 2012 at 1:00 PM, Agnieszka Kukałowicz <agnieszka.kukalow...@usable.pl> wrote: > Hi, > > Is the any way to make grouping searches more efficient? > > My queries look like: > /select?q=query&group=true&group.field=id&group.facet=true&group.ngroups=true&facet.field=category1&facet.missing=false&facet.mincount=1 > > For index with 3 mln documents query for all docs with group=true takes > almost 4000ms. Because queryResultCache is not used next queries take a > long time also. > > When I remove group=true and leave only faceting the query for all docs > takes much more less time: for first time ~ 700ms and next runs only 200ms > because of queryResultCache being used. > > So with group=true the query is about 20 time slower than without it. > Is it possible or is there any way to improve performance with grouping? > > My application needs grouping feature and all of the queries use it but the > performance of them is to low for production use. > > I use Solr 4.x from trunk > > Agnieszka Kukalowicz
