Hi Solr-Users,

I am trying to better understand the solr capabilities, how one can
formulate queries in JSON format as well as tweak parameters. Currently I
have a logs collection (ca 6GB large) with a dozen of attributes running in
single server mode (F:\solr_deployment\solr-8.7.0\bin\solr.cmd start -h
localhost -p 5555 -m 4g)

I am playing with faceting functionality in solr and query a couple of
attributes there. My typical query is:

GET http://localhost:5555/solr/db/query
<http://arteika:5555/solr/logan/query> HTTP/1.1
content-type: application/json

{
    "query"  : "*:*",
    "limit"  : 0,
    "facet": {
        "t" : {
            "type":  "terms",
            "field": "fcomp",
            "sort":  "index",

            "facet": {
                "t_buckets": {
                    "type":  "range",
                    "field": "t",
                    "sort": { "t": "asc" },
                    "start": "2018-05-02T17:00:00.000Z",
                    "end":   "2020-11-16T21:00:00.000Z",
                    "gap":   "+1HOUR"
                }
            }
        },
    }
}

not surprisingly, it takes a bit to compute the result, so I tried to
increase the number of threads. How do I do it in JSON format? I tried
adding

{
    "params": {
        "facet.threads": 8
    },
    "query"  : "*:*",
...
}

and checked the jstack <pid> of the solr java process, but I still see only
one thread working.  Can I configure params through the params section?

I also tried

{
    "query"  : "*:*",
    "limit"  : 0,
    "facet": {
        "t" : {
            "type":  "terms",
            "field": "fcomp",
            "sort":  "index",

            "facet": {
                "t_buckets": {
                    "type":  "range",
                    "field": "t",
                    "sort": { "t": "asc" },
                    "start": "2018-05-02T17:00:00.000Z",
                    "end":   "2020-11-16T21:00:00.000Z",
                    "gap":   "+1HOUR"
                }
            },
            "threads":8
        },
    }
}

but this ran in one thread as well. Can I influence the number of threads
in the "facet" section of JSON?

Cheers,
Arturas

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