distrib.requestTimes and distrib.totalTime metric always show 0 for any sub-metric

[gnandre <ar...@gmail.com>]

*distrib.requestTimes and *distrib.totalTime metric always show 0 for any
sub-metric. Only *local.requestTimes and *local.totalTime metric have
non-zero values. This is when we hit solr:8983/solr/admin/metrics endpoint.

e.g.

      "QUERY./select.distrib.requestTimes":{
        "count":0,
        "meanRate":0.0,
        "1minRate":0.0,
        "5minRate":0.0,
        "15minRate":0.0,
        "min_ms":0.0,
        "max_ms":0.0,
        "mean_ms":0.0,
        "median_ms":0.0,
        "stddev_ms":0.0,
        "p75_ms":0.0,
        "p95_ms":0.0,
        "p99_ms":0.0,
        "p999_ms":0.0},


      "QUERY./select.local.requestTimes":{
        "count":921,
        "meanRate":0.016278013505962197,
        "1minRate":0.02502213358051701,
        "5minRate":0.01792972725206014,
        "15minRate":0.016913129796499247,
        "min_ms":0.092099,
        "max_ms":27.833606,
        "mean_ms":1.5546483254237826,
        "median_ms":0.211898,
        "stddev_ms":2.353088809601306,
        "p75_ms":0.278897,
        "p95_ms":5.547842,
        "p99_ms":5.547842,
        "p999_ms":9.239902},


      "QUERY./select.requestTimes":{
        "count":921,
        "meanRate":0.01627801345713971,
        "1minRate":0.02502213358051701,
        "5minRate":0.01792972725206014,
        "15minRate":0.016913129796499247,
        "min_ms":0.094899,
        "max_ms":27.840706,
        "mean_ms":1.5588447262406753,
        "median_ms":0.216198,
        "stddev_ms":2.352629359382386,
        "p75_ms":0.284497,
        "p95_ms":5.551242,
        "p99_ms":5.551242,
        "p999_ms":9.242902},


I am using the 8.5.2 version of Solr in standalone mode.I have some queries
that are distributed in the sense that they use shards parameter to
distribute the query among different cores. I was expecting that the
distrib metric would have some value when I execute these distributed
queries.

Also, what is the need of a third metric besides local and distrib?