[GitHub] gatorsmile commented on a change in pull request #23551: [SPARK-26622][SQL] Revise SQL Metrics labels

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

gatorsmile commented on a change in pull request #23551: [SPARK-26622][SQL] Revise SQL Metrics labels
URL: https://github.com/apache/spark/pull/23551#discussion_r248071892
 
 

 ##########
 File path: sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMap.java
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 @@ -226,10 +226,10 @@ public void free() {
   }
 
   /**
-   * Gets the average hash map probe per looking up for the underlying `BytesToBytesMap`.
+   * Gets the collision rate per looking up for the underlying `BytesToBytesMap`.
    */
-  public double getAverageProbesPerLookup() {
-    return map.getAverageProbesPerLookup();
+  public double getHashCollisionsPerLookup() {
+    return map.getAverageProbesPerLookup() - 1.0;
 
 Review comment:
   advanced users. :)

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