Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/4509#discussion_r152252414
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/RemoteInputChannel.java
---
@@ -306,62 +314,79 @@ public void recycle(MemorySegment segment) {
ExceptionUtils.rethrow(t);
}
}
- availableBuffers.add(new Buffer(segment, this));
+
+ // Recycle one extra floating buffer to always maintain
(senderBacklog + initialCredit) buffers available.
+ if (bufferQueue.getAvailableBufferSize() ==
numRequiredBuffers) {
--- End diff --
extract this into `AvailableBufferQueue#maintainTargetSize()`?
---
