xuanyuanking commented on a change in pull request #23207: [SPARK-26193][SQL] 
Implement shuffle write metrics in SQL
URL: https://github.com/apache/spark/pull/23207#discussion_r239995006
 
 

 ##########
 File path: sql/core/src/main/scala/org/apache/spark/sql/execution/limit.scala
 ##########
 @@ -38,13 +38,21 @@ case class CollectLimitExec(limit: Int, child: SparkPlan) 
extends UnaryExecNode
   override def outputPartitioning: Partitioning = SinglePartition
   override def executeCollect(): Array[InternalRow] = child.executeTake(limit)
   private val serializer: Serializer = new 
UnsafeRowSerializer(child.output.size)
-  override lazy val metrics = 
SQLShuffleMetricsReporter.createShuffleReadMetrics(sparkContext)
+  private lazy val writeMetrics =
+    SQLShuffleWriteMetricsReporter.createShuffleWriteMetrics(sparkContext)
+  private lazy val readMetrics =
+    SQLShuffleMetricsReporter.createShuffleReadMetrics(sparkContext)
 
 Review comment:
   Yea that was done and revert in 
https://github.com/apache/spark/pull/23207/commits/7d104ebe854effb3d8ceb63cd408b9749cee1a8a,
 will separate to another pr after this. Done in #23286.

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