bharath-techie opened a new issue, #14514: URL: https://github.com/apache/lucene/issues/14514
### Description This is fork of the issue https://github.com/apache/lucene/issues/14463 specific to postings format regression. As part of 10.0 Lucene, default readAdvice changed to random and we noticed that termsIndex which uses default readAdvice regressed during force merge. ``` String termsName = IndexFileNames.segmentFileName(segment, state.segmentSuffix, TERMS_EXTENSION); termsIn = state.directory.openInput(termsName, state.context); ``` So there could be other implementations and file formats which has similar regressions but fixing the `termsIn` removed the 20% regression we saw between OpenSearch 2.19 [ Lucene 9.12.1] and OpenSearch 3.0 [Lucene 10.1]. So creating this issue to track postings related force merge regressions and fixes. ### Version and environment details _No response_ -- 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.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
