mitchsw commented on issue #23644: URL: https://github.com/apache/datafusion/issues/23644#issuecomment-4997405041
Here is an illustrative dial9 trace of a query on an ~idle server. At the start of the query, we see ~50ms of kernel scheduling delay on all workers. The blocking calls are all `futex_wait` on stacks containing this frame: https://github.com/apache/datafusion/blob/54.0.0/datafusion/physical-expr-common/src/metrics/mod.rs#L492-L494. <img width="1512" height="833" alt="Image" src="https://github.com/user-attachments/assets/6a36cf8a-46e1-435f-82a6-9a2555760b27"; /> -- 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]
