Github user frreiss commented on a diff in the pull request:
https://github.com/apache/spark/pull/15307#discussion_r81672432
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/StreamExecution.scala
---
@@ -317,15 +358,18 @@ class StreamExecution(
// TODO: Move this to IncrementalExecution.
// Request unprocessed data from all sources.
- val newData = availableOffsets.flatMap {
- case (source, available)
+ val newData = timeIt(GET_BATCH_LATENCY) {
--- End diff --
Note that the time interval being measured here will have different
semantics for different sources, depending on how much computation occurs
inside the source's `getBatch` method vs. lazily when the data is read from the
resulting Dataframe.
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