How can we make group_field null? Using nullPolicy=expand ?
On Mon, Mar 8, 2021 at 4:41 PM Florin Babes <babesflo...@gmail.com> wrote:
> We improved the performance of collapse by making the group_field null for
> the documents that have an unique value for group_field. This might help/
>
>
> În lun., 8 mar. 2021 la 12:40, Parshant Kumar
> <parshant.ku...@indiamart.com.invalid> a scris:
>
> > yes,group_field is having high cardinality.
> >
> >
> > Thanks
> > Parshant Kumar
> >
> > On Mon, Mar 8, 2021 at 4:06 PM Florin Babes <babesflo...@gmail.com>
> wrote:
> >
> > > Your group_field has a high cardinality?
> > > Thanks,
> > > Florin Babes
> > >
> > > În lun., 8 mar. 2021 la 10:35, Parshant Kumar
> > > <parshant.ku...@indiamart.com.invalid> a scris:
> > >
> > > > Hi florin,
> > > >
> > > > I am using below.
> > > >
> > > > 1) fq={!collapse field=parentglusrid}
> > > > 2) expand.rows=4
> > > > 3) expand=true
> > > >
> > > > Size of index is around 100GB.
> > > > Solr version is 6.5
> > > >
> > > > On Mon, Mar 8, 2021 at 1:46 PM Florin Babes <babesflo...@gmail.com>
> > > wrote:
> > > >
> > > > > 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
> > > > > > >
> > > > > >
> > > > > > --
> > > > > >
> > > > > >
> > > > >
> > > >
> > > > --
> > > >
> > > >
> > >
> >
> > --
> >
> >
>
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