ariel-miculas-trif opened a new issue, #22164: URL: https://github.com/apache/datafusion/issues/22164
### Describe the bug When the partial hash aggregation with GroupOrdering::None cannot reserve more memory, it switches to an early emit phase with EmitTo::First(n), where n is close to the length of group_values. `take_n` implementations use `first_n_offsets = self.offsets.drain(0..n).collect::<Vec<_>>();`, which copies the n elements into a new allocation. Furthermore, drain doesn't affect the Vec's capacity, so no memory freeing is done. ### To Reproduce _No response_ ### Expected behavior _No response_ ### 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] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
