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Posted to issues@flink.apache.org by "aitozi (JIRA)" <ji...@apache.org> on 2018/08/21 08:54:00 UTC

[jira] [Closed] (FLINK-10158) The DataOutputSerializer may consume excessive memory

     [ https://issues.apache.org/jira/browse/FLINK-10158?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

aitozi closed FLINK-10158.
--------------------------
    Resolution: Duplicate

> The DataOutputSerializer may consume excessive memory
> -----------------------------------------------------
>
>                 Key: FLINK-10158
>                 URL: https://issues.apache.org/jira/browse/FLINK-10158
>             Project: Flink
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 1.4.2, 1.5.2, 1.6.0
>            Reporter: aitozi
>            Assignee: aitozi
>            Priority: Major
>
> I found that the dataOutputSerializer clear the intermediate buffer when the buffer exceed the 5M (as a fixed configuration)， But when we encountered the rebalance or keyByPartition and the downstream has a large parallel it will also consume a lot memory, we can do two things :
> 1. make this config configurable
> 2. like the https://issues.apache.org/jira/projects/FLINK/issues/FLINK-1326 mentioned, we can make the serializer one for the output
> What's your idea ? [~StephanEwen]



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