Dandandan opened a new issue #700: URL: https://github.com/apache/arrow-datafusion/issues/700
**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** In https://github.com/apache/arrow-datafusion/pull/698 some improvements where added to avoid sleeping when there are enough tasks around. In order to support quicker query responses (e.g. <100ms) and avoid delays in between stages we need to remove calls like `sleep(Duration::from_millis(100))` from executor/scheduler and move away from interval-based polling. This also will reduce CPU/network waste, as there are less calls being done (currently I am seeing around `1-2%` of CPU being used when idling, not much, but when going to higher polling frequencies this increases. Setting it to 1ms gives it a very high CPU usage. **Describe the solution you'd like** Wait on tasks to be available in the scheduler and only send a response when having tasks for the worker. Remove calls to `sleep`. **Describe alternatives you've considered** A clear and concise description of any alternative solutions or features you've considered. **Additional context** Add any other context or screenshots about the feature request here. -- 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: github-unsubscr...@arrow.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
