Dandandan opened a new issue, #6043: URL: https://github.com/apache/arrow-datafusion/issues/6043
### Describe the bug RoundRobin repartitioning currently does not distribute the input tasks evenly over the output channels, causing the work to be not distributed evenly. ### To Reproduce When loading the data in memory in the TPC-H benchmark, this can be seen in the number of batches in `MemoryExec` (which uses RoundRobin partitioning). `MemoryExec: partitions=32, partition_sizes=[32, 32, 32, 32, 32, 32, 32, 32, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16], metrics=[]` It has a bias for the first output partitions/channels. ### Expected behavior Batches should be distributed more evenly over output channels. ### Additional context _No response_ -- 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. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
