Function queries in ‘q’ score EVERY DOCUMENT. Use ‘bf’ or ‘boost’ for the
function part, so its only computed on main query matching docs.
Erik
> On Apr 9, 2019, at 03:29, Sidharth Negi <sidharth.negi...@gmail.com> wrote:
>
> Hi,
>
> I'm working with "edismax" and "function-query" parsers in Solr and have
> difficulty in understanding whether the query time taken by
> "function-query" makes sense. The query I'm trying to optimize looks as
> follows:
>
> q={!func sum($q1,$q2,$q3)} where q1,q2,q3 are edismax queries.
>
> The QTime returned by edismax queries takes well under 50ms but it seems
> that function-query is the rate determining step since combined query above
> takes around 200-300ms. I also analyzed the performance of function query
> using only constants.
>
> The QTime results for different q are as follows:
>
> -
>
> 097ms for q={!func} sum(10,20)
> -
>
> 109ms for q={!func} sum(10,20,30)
> -
>
> 127ms for q={!func} sum(10,20,30,40)
> -
>
> 145ms for q={!func} sum(10,20,30,40,50)
>
> Does this trend make sense? Are function-queries expected to be this slow?
>
> What makes edismax queries so much faster?
>
> What can I do to optimize my original query (which has edismax subqueries
> q1,q2,q3) to work under 100ms?
>
> I originally posted this question
> <https://stackoverflow.com/questions/55352565/understanding-solr-function-query-performance>
> on
> StackOverflow with no success, so any help here would be appreciated.
