Hello, It seems to me that the cross_field does more than the SOLR dismax query. To compare the same thing in both ES and Solr, you could run the disMax query with Es and start from there ==> http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-dis-max-query.html
Hope it helps Stéphane On Tuesday, June 24, 2014 5:09:21 PM UTC+2, Christoph Lingg wrote: > > Hi! > > we're using elasticsearch for an open source geocoder called photon. We're > using solr previously but we switched to elasticsearch some time ago and > I'am using now multi_match's cross_field > <http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-multi-match-query.html#type-cross-fields> > > query (which is great by the way as it sorts out most problems we had > before). > > I investigated the performance between both implementation and it turned > out that the elasticsearch is about 5 times slower than the solr > counterpart. The dataset (100,000,000 documents) is identical and the size > of both indices too. On the solr side, I am using an edismax > <https://github.com/komoot/photon/blob/deprecated-solr-version/solrconfig/collection1/conf/solrconfig.xml#L122> > > query whilst it is a cross_field > <https://github.com/christophlingg/photon/blob/komoot/website/photon/app.py#L25> > on > elasticsearch. Average query time is 120ms vs. 1000s. > > I adjusted the number of open file descriptors to 64k, during the > benchmark there is (almost) no IO whilst the cpu is very high (> 75%, 12 > cores). As cross_field is a very recent feature I tried out best_field > <http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-multi-match-query.html#type-best-fields> > as > well, but benchmark results weren't better. > > Do you have any ideas on how I can dig more into performance issues like > this in elasticsearch? Do you have experience with both queries you can > share with me? > > Thanks for your help! > Christoph > -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/ec1e15ad-5e1e-4371-a587-1b34d9b54241%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
