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Posted to issues@flink.apache.org by "Jiayi Liao (Jira)" <ji...@apache.org> on 2020/02/14 02:27:00 UTC

[jira] [Commented] (FLINK-16012) Reduce the default number of exclusive buffers from 2 to 1 on receiver side

    [ https://issues.apache.org/jira/browse/FLINK-16012?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17036647#comment-17036647 ] 

Jiayi Liao commented on FLINK-16012:
------------------------------------

[~kevin.cyj] Which result is tested before the change? And which is after?

> 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: Improvement
>            Reporter: Zhijiang
>            Assignee: Yingjie Cao
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.11.0
>
>         Attachments: image-2020-02-13-21-54-05-026.png, image-2020-02-13-23-30-17-951.png, image-2020-02-14-07-23-16-171.png, image-2020-02-14-09-13-07-967.png
>
>          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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