[jira] [Resolved] (FLINK-32810) Improve managed memory usage in ListStateWithCache

["Zhipeng Zhang (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-32810?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zhipeng Zhang resolved FLINK-32810.
-----------------------------------
    Fix Version/s: ml-2.4.0
         Assignee: Fan Hong
       Resolution: Fixed

> Improve managed memory usage in ListStateWithCache
> --------------------------------------------------
>
>                 Key: FLINK-32810
>                 URL: https://issues.apache.org/jira/browse/FLINK-32810
>             Project: Flink
>          Issue Type: Improvement
>          Components: Library / Machine Learning
>            Reporter: Fan Hong
>            Assignee: Fan Hong
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: ml-2.4.0
>
>
> Right now, by default, an instance of `ListStateWithCache` uses up all the managed memory allocated for`ManagedMemoryUseCase.OPERATOR`.
> It could bring some bugs in some situations, for example, when there exist more than one `ListStateWithCache`s in a single operator, or there are other places using managed memory of `ManagedMemoryUseCase.OPERATOR`.
>  
> An approach to resolve such cases is to let the developer be aware about the usage of managed memory of `ManagedMemoryUseCase.OPERATOR`, instead of implicitly use up all of it.  Therefore, I think it is better to add a parameters `fraction` to specify how much memory is used in the `ListStateWithCache`.



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