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https://issues.apache.org/jira/browse/FLINK-8581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16642745#comment-16642745
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ASF GitHub Bot commented on FLINK-8581:
---------------------------------------

zhijiangW commented on a change in pull request #6698: [FLINK-8581][network] 
Move flushing remote subpartitions from OutputFlusher to netty
URL: https://github.com/apache/flink/pull/6698#discussion_r223550777
 
 

 ##########
 File path: 
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/PipelinedSubpartition.java
 ##########
 @@ -77,6 +77,14 @@ public void flush() {
                }
        }
 
+       @Override
+       public void registerPeriodicFlush(long flushTimeout) {
 
 Review comment:
   1. The behavior of this method may be simple like `notifyDataAvailable`?  So 
we can reduce `synchronized` part.
   ```
                if (readView != null) {
                        readView. registerPeriodicFlush(flushTimeout);
                }
   ```
   2. This implementation is same in 
`SpillableSubpartition#registerPeriodicFlush`, how about implementing this 
method in the parent `ResultSubpartition#registerPeriodicFlush`? And the 
relevant change is also defining protected `readView` in `ResultSubpartition`.

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> Improve performance for low latency network
> -------------------------------------------
>
>                 Key: FLINK-8581
>                 URL: https://issues.apache.org/jira/browse/FLINK-8581
>             Project: Flink
>          Issue Type: Improvement
>          Components: Network
>    Affects Versions: 1.5.0
>            Reporter: Piotr Nowojski
>            Assignee: Piotr Nowojski
>            Priority: Major
>              Labels: pull-request-available
>




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