zhiqiang-hhhh commented on PR #44690: URL: https://github.com/apache/doris/pull/44690#issuecomment-2771880611
> @zhiqiang-hhhh - `set experimental_enable_parallel_scan=false` did not work for me and hitting same error. Trying to understand better , if we `set num_scanner_threads=16` will it not slow down all the queries executed and do I need to be on specific version to test these override properties. 1. Affect on performance of `set num_scanner_threads =16` depends on many factors. For your use case(a high QPS situation ? ) I think limit the scanner concurrency will not have a huge affect on query performance, since submit too many scanners at same time is not meaningful. 2. No. Strategy of scanner submitting is almost same on 2.1 and 3.0 (maybe a little difference). -- 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]
