[SOLR-9026] Design Facet Telemetry for non-JSON field facet

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 6.1, 7.0
• Component/s: Facet Module
• Assignee: Unassigned
• Reporter: Michael Sun
• Created: 21/Apr/16 16:25
• Updated: 17/Jun/16 13:11
• Resolved: 07/May/16 22:50

Description

Non-JSON facet is widely used and telemetry is helpful is diagnosing expensive queries. As first step, the JIRA is to design telemetry for field facet.

Example: (using films)

$curl 'http://localhost:8228/solr/films/select?debugQuery=true&facet.field=genre&facet.field=directed_by&facet=true&indent=on&q=*:*&wt=json'
...
    "facet-trace":{
      "elapse":1,
      "sub-facet":[{
          "processor":"SimpleFacets",
          "elapse":1,
          "action":"field facet",
          "maxThreads":0,
          "sub-facet":[{
              "method":"FC",
              "inputDocSetSize":1100,
              "field":"genre",
              "numBuckets":213},
            {
              "method":"FC",
              "inputDocSetSize":1100,
              "field":"directed_by",
              "numBuckets":1053}]}]},
...