JkSelf commented on pull request #29540: URL: https://github.com/apache/spark/pull/29540#issuecomment-683515925
In our 3TB TPC-DS benchmark, there will be performance regression when the coalesced partition num < shuffle partition number without AQE. So we set the min partition number to the default parallelism to avoid the regression. @manuzhang Even the initial partition number is large, AQE will coalesce the original partition number to proper partition number not large number in [here](https://github.com/apache/spark/blob/6dacba7fa044555512f974595ed52f7316bb97f9/sql/core/src/main/scala/org/apache/spark/sql/execution/adaptive/ShufflePartitionsUtil.scala#L56). ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
