alamb commented on issue #18909: URL: https://github.com/apache/datafusion/issues/18909#issuecomment-3572852114
I spent quite a while today running DataFusion with the ClickBench scripts on a `c6a.4xlarge` VM to try and understand the performance results that @pmcgleenon was seeing Here is all the raw data if you want to look at it yourself (open index.html) - [report.zip](https://github.com/user-attachments/files/23732361/report.zip) <img width="677" height="983" alt="Image" src="https://github.com/user-attachments/assets/6948fef0-36b5-4975-9434-0a502f706afc"; /> Conclusions: 1. I can reproduce the lack of improvement between DataFusion 47 and 51 (not sure the root cause, yet) 2. Cache parquet metadata will improve performance by 20% (details below). 3. There is significant variance between runs -- I saw up to 7% variance between runs on DataFusion 51 on c6a.4xlarge. My next steps will be to more carefully profile what is going on in datafusion 47 vs 51 for some of the queriers and see where the time is being spent -- 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]
