Hello, First let's call the field you collapse on group_field If group_field has a high cardinality you should make group_field null for those documents that have a unique group_field and set nullPolicy=expand. By doing that solr will use less memory for it's internal maps (so faster gc) and the head selecting will be faster. What is your head selecting strategy? Can you share your fq which you use for collapsing?
Thanks, Florin Babes În lun., 8 mar. 2021 la 06:44, Parshant Kumar <parshant.ku...@indiamart.com.invalid> a scris: > anyone please help > > On Wed, Mar 3, 2021 at 4:55 PM Parshant Kumar < > parshant.ku...@indiamart.com> > wrote: > > > Hi all, > > > > We have implemented collapse queries in place of grouped queries on our > > production solr. As mentioned in solr documentation collapse queries are > > recommended in place of grouped queries in terms of performance . But > after > > switching to collapsed queries from grouped queries response time of > > queries have increased. This is unexpected behaviour, the response time > > should have been improved but results are opposites. > > Please someone help why response time is increased for collapsed queries. > > > > Thanks > > Parshant Kumar > > > > -- > >
