zanmato1984 opened a new issue, #45611: URL: https://github.com/apache/arrow/issues/45611
When benchmarking hash join build phase using [this benchmark](https://github.com/apache/arrow/blob/31994b5c2069a768e70fba16d1f521e4de64139e/cpp/src/arrow/acero/hash_join_benchmark.cc#L301), I saw significant contention when the concurrency is high. As the following flame graph shows, function [PartitionLocks::AcquirePartitionLock](https://github.com/apache/arrow/blob/31994b5c2069a768e70fba16d1f521e4de64139e/cpp/src/arrow/acero/partition_util.cc#L56) (the long yellow bar in the middle) takes quite a lot CPU time (thanks to that it is using spin lock rather than mutex, otherwise it may not be so eye-catching). We should consider optimizing this.  -- 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: issues-unsubscr...@arrow.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
