shatejas opened a new pull request, #13985: URL: https://github.com/apache/lucene/pull/13985
reading from IndexInput The change is needed to be able to reduce the force merge time. Lucene99FlatVectorsReader is opened with IOContext.RANDOM, this optimizes searches with madvise as RANDOM. For merges we need sequential access and ability to preload pages to be able to shorten the merge time. The change updates the ReadAdvice.SEQUENTIAL before the merge starts and reverts it to ReadAdvice.RANDOM at the end of the merge for Lucene99FlatVectorsReader. ### Description Benchmarking results coming up. Opening as a draft to get initial feedback ### Related issues https://github.com/apache/lucene/issues/13920 <!-- If this is your first contribution to Lucene, please make sure you have reviewed the contribution guide. https://github.com/apache/lucene/blob/main/CONTRIBUTING.md --> -- 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
