jimczi commented on issue #14408: URL: https://github.com/apache/lucene/issues/14408#issuecomment-2755462640
> Let the defaults be as smart as they need. Maybe check /sys/kernel/mm/lru_gen/enabled as part of the decision-making! But IMO let the user have the final say, in an easy way. ++, the normal path for users to override is to use the system property or to write a custom directory if they want the full control. We should remove the overrides in the vector search codec. We default to random anyway. > Maybe check /sys/kernel/mm/lru_gen/enabled as part of the decision-making! The Linux change targets both MGLRU and normal LRU. The impact is more pronounced in MGLRU, as page reclamation is more aggressive there. However, the semantic change for this advice is the same in both cases. In the latest kernels, using `MADV_RANDOM` does not mark the page as accessed, regardless of whether MGLRU is in use. That's a big shift of semantic for our default read advice. -- 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
