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https://issues.apache.org/jira/browse/FLINK-17137?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17193316#comment-17193316
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tartarus commented on FLINK-17137:
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[~libenchao] hello, Is this to reduce state access to improve performance? It 
seems that the benefits will be more obvious under rocksdb.

> Support mini batch for WindowOperator in blink planner
> ------------------------------------------------------
>
>                 Key: FLINK-17137
>                 URL: https://issues.apache.org/jira/browse/FLINK-17137
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table SQL / Planner, Table SQL / Runtime
>            Reporter: Benchao Li
>            Priority: Major
>
> Currently only regular aggregate and deduplicate support mini batch. 
> WindowOperator is a very frequently used operator in Flink, it's very helpful 
> to support mini batch for it.
> Design document:  
> https://docs.google.com/document/d/1GYlrg8dkYcw5fuq1HptdA3lygXrS_VRbnI8NXoEtZCg/edit?usp=sharing
> cc [~jark]



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