I have server with 24GB RAM. I have 4 shards on it, each of them with 4GB RAM for java: JAVA_OPTIONS="-server -Xms4096M -Xmx4096M" The size is about 15GB for one shard (i use ssd disk for index data).
Agnieszka 2012/7/16 <alx...@aim.com> > What are the RAM of your server and size of the data folder? > > > > -----Original Message----- > From: Agnieszka Kukałowicz <agnieszka.kukalow...@usable.pl> > To: solr-user <solr-user@lucene.apache.org> > Sent: Mon, Jul 16, 2012 6:16 am > Subject: Re: Grouping performance problem > > > Hi Pavel, > > I tried with group.ngroups=false but didn't notice a big improvement. > The times were still about 4000 ms. It doesn't solve my problem. > Maybe this is because of my index type. I have millions of documents but > only about 20 000 groups. > > Cheers > Agnieszka > > 2012/7/16 Pavel Goncharik <pavel.goncha...@gmail.com> > > > 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 > > > > >
