When initial tuning is complete, you can view the tuning recommendation and the performance improvement. The improvement is measured in the amount of time that it takes for the
mapping
task to run using the recommended set of Spark properties.
The following image shows the tuning results for a particular
mapping
task:
You can apply the recommendation to use the Spark property values in the
mapping
task. You can also revert the Spark properties to their original values and apply the recommendation again.