mikemccand commented on code in PR #15585:
URL: https://github.com/apache/lucene/pull/15585#discussion_r2732151120
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lucene/core/src/java/org/apache/lucene/store/MemorySegmentIndexInput.java:
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@@ -74,12 +75,28 @@ public static MemorySegmentIndexInput newInstance(
boolean confined,
Function<IOContext, ReadAdvice> toReadAdvice) {
assert
Arrays.stream(segments).map(MemorySegment::scope).allMatch(arena.scope()::equals);
+ AtomicInteger sharedPrefetchCounter = new AtomicInteger();
Review Comment:
So net/net I think the behavior is reasonable -- we check with 1/2 the
frequency, up until `1 << 31 = 2147483648` at which point we stop halving the
frequency of checks and do it every `2147483648` calls. That's great -- no
exception, still checking (rarely!).
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