alamb commented on PR #21480: URL: https://github.com/apache/datafusion/pull/21480#issuecomment-4229655072
> Thanks everyone for the review. I will address comments and in the meantime I have attached a profile screenshot from our production in the PR description. We query many small files very frequently (thousands of QPS), which are already pre-filtered outside of datafusion so pruning predicates have little effect. As can be seen, half of query time is spent opening files. @fpetkovski -- if you have many files with similar schema, optimzing this more via https://github.com/apache/datafusion/issues/21554 may help substantially -- 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]
