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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