[GitHub] sunithabeeram opened a new pull request #3872: Add metrics to track work done in group-by phase

[GitBox <gi...@apache.org>]

sunithabeeram opened a new pull request #3872: Add metrics to track work done in group-by phase
URL: https://github.com/apache/incubator-pinot/pull/3872
 
 
   Add code to log and emit metrics related to group-by execution:
   - Number of groups ignored when generating group-by keys per segment (IgnoredPreCombine)
   - Number of groups ignored during the combine phase (IgnoredInCombine)
   - Number of groups aggregated during combine phase (AggrInCombine)
   - Number of groups ignored/trimmed after aggregation (PostCombine)

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