original-brownbear commented on PR #14156:
URL: https://github.com/apache/lucene/pull/14156#issuecomment-2607332400

   @jpountz I see.  Hmm I wonder how much that saves us? Seems we just trade an 
`isLoaded` for an `madvise` on systems with enough memory? That said, maybe the 
`madvise` is far cheaper because it doesn't necessarily cover the whole segment 
like the `isLoaded` check?
   


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