Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/18258#discussion_r121315825
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/metric/SQLMetrics.scala
---
@@ -103,13 +103,43 @@ object SQLMetrics {
}
/**
+ * Create a metric to report the average information (including min,
med, max) like
+ * avg hashmap probe. Because `SQLMetric` stores long values, we take
the ceil of the average
+ * values before storing them. This metric is used to record an average
value computed in the
+ * end of a task. It should be set once. The initial values (zeros) of
this metrics will be
+ * excluded after.
+ */
+ def createAverageMetric(sc: SparkContext, name: String): SQLMetric = {
+ // The final result of this metric in physical operator UI may looks
like:
+ // probe avg (min, med, max):
+ // (1, 6, 2)
--- End diff --
med is medium? why 6?
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