uschindler commented on code in PR #13570:
URL: https://github.com/apache/lucene/pull/13570#discussion_r1688093358
##########
lucene/core/src/java21/org/apache/lucene/store/MemorySegmentIndexInputProvider.java:
##########
@@ -125,4 +135,77 @@ private final MemorySegment[] map(
}
return segments;
}
+
+ @Override
+ public ConcurrentHashMap<String, RefCountedSharedArena> attachment() {
+ return new ConcurrentHashMap<>();
+ }
+
+ /**
+ * This sysprop allows to control the max number of permits that a
RefCountedSharedArena will
+ * support for its lifetime. For example, to set the max number of permits
to 256, pass the
+ * following on the command line pass {@code
+ *
-Dorg.apache.lucene.store.MemorySegmentIndexInputProvider.sharedArenaMaxPermits=256}.
Review Comment:
The goog thing is you could make this constant into MMapDirectory and add it
to documentation there (like done for the above in 9.x).
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