dweiss commented on a change in pull request #1917:
URL: https://github.com/apache/lucene-solr/pull/1917#discussion_r494311008
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File path:
lucene/core/src/java/org/apache/lucene/store/ByteBuffersDataOutput.java
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@@ -400,8 +400,13 @@ public void writeSetOfStrings(Set<String> set) {
public long ramBytesUsed() {
// Return a rough estimation for allocated blocks. Note that we do not make
// any special distinction for direct memory buffers.
- return RamUsageEstimator.NUM_BYTES_OBJECT_REF * blocks.size() +
- blocks.stream().mapToLong(buf -> buf.capacity()).sum();
+ ByteBuffer first = blocks.peek();
+ if (first == null) {
+ return 0L;
+ } else {
+ // All blocks have the same capacity.
Review comment:
Hmmm... Do they? I don't think this is the case, in general, since you
can plug in an arbitrary block provider/ recycler?
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