Github user BryanCutler commented on a diff in the pull request:
https://github.com/apache/spark/pull/16774#discussion_r111042302
--- Diff:
examples/src/main/scala/org/apache/spark/examples/ml/ModelSelectionViaTrainValidationSplitExample.scala
---
@@ -65,6 +65,8 @@ object ModelSelectionViaTrainValidationSplitExample {
.setEstimatorParamMaps(paramGrid)
// 80% of the data will be used for training and the remaining 20%
for validation.
.setTrainRatio(0.8)
+ // Evaluate up to 2 parameter settings in parallel
+ .setNumParallelEval(2)
--- End diff --
TODO: I should probably set this in Java too, to be consistent
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