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https://issues.apache.org/jira/browse/FLINK-16012?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17323094#comment-17323094
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Flink Jira Bot commented on FLINK-16012:
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This issue is assigned but has not received an update in 7 days so it has been 
labeled "stale-assigned". If you are still working on the issue, please give an 
update and remove the label. If you are no longer working on the issue, please 
unassign so someone else may work on it. In 7 days the issue will be 
automatically unassigned.

> Reduce the default number of exclusive buffers from 2 to 1 on receiver side
> ---------------------------------------------------------------------------
>
>                 Key: FLINK-16012
>                 URL: https://issues.apache.org/jira/browse/FLINK-16012
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Runtime / Network
>            Reporter: Zhijiang
>            Assignee: Yingjie Cao
>            Priority: Major
>              Labels: pull-request-available, stale-assigned
>             Fix For: 1.14.0
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> In order to reduce the inflight buffers for checkpoint in the case of back 
> pressure, we can reduce the number of exclusive buffers for remote input 
> channel from default 2 to 1 as the first step. Besides that, the total 
> required buffers are also reduced as a result. We can further verify the 
> performance effect via various of benchmarks.



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