mikemccand commented on issue #14630: URL: https://github.com/apache/lucene/issues/14630#issuecomment-2889212582
OK thank you @jpountz and @rmuir! Downgrading the kernel to 6.12.4 indeed recovered our lost performance, so it looks like that change in HZ (how many time slices the Linux scheduler divides each second into) from 300 (Arch Linux) -> 1000 was the cause of our slowdown. It's surprising it has such a big impact ... seems maybe we all might look into tuning this HZ in our production clusters! I added annotations (see `IG`, `IH`, and `II`, e.g. on the [`NumericRangeQuery (int)` task](https://benchmarks.mikemccandless.com/IntNRQ.html). I will put everything back (upgraded kernel, Lucene back on `main`, Java back on 24), so we accept and just annotate this performance impact. -- 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: issues-unsubscr...@lucene.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org For additional commands, e-mail: issues-h...@lucene.apache.org
