[jira] [Updated] (FLINK-9253) Make buffer count per InputGate always #channels*buffersPerChannel + ExclusiveBuffers

["Chesnay Schepler (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-9253?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chesnay Schepler updated FLINK-9253:
------------------------------------
    Fix Version/s:     (was: 1.6.5)

> Make buffer count per InputGate always #channels*buffersPerChannel + ExclusiveBuffers
> -------------------------------------------------------------------------------------
>
>                 Key: FLINK-9253
>                 URL: https://issues.apache.org/jira/browse/FLINK-9253
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Runtime / Network
>    Affects Versions: 1.5.0, 1.6.0
>            Reporter: Nico Kruber
>            Assignee: Nico Kruber
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.7.3
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> The credit-based flow control path assigns exclusive buffers only to remote channels (which makes sense since local channels don't use any own buffers). However, this is a bit intransparent with respect to how much data may be in buffers since this depends on the actual schedule of the job and not the job graph.
> By adapting the floating buffers to use a maximum of {{#channels*buffersPerChannel + floatingBuffersPerGate - #exclusiveBuffers}}, we would be channel-type agnostic and keep the old behaviour.



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