Github user NicoK commented on a diff in the pull request: https://github.com/apache/flink/pull/4499#discussion_r136056467 --- Diff: flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/RemoteInputChannel.java --- @@ -72,6 +79,21 @@ */ private int expectedSequenceNumber = 0; + /** The initial number of exclusive buffers assigned to this channel. */ + private int initialCredit; + + /** The current available exclusive buffers and requested floating buffers from buffer pool. */ + private final Queue<Buffer> availableBuffers = new ArrayDeque<>(); --- End diff -- I'd prefer to use `ArrayDeque` here for the member as well to help the JVM to optimise a bit (methods should mostly use less concrete types such as `Queue` to not limit users too much, but this is not necessary for a private member)
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