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https://issues.apache.org/jira/browse/FLINK-20611?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17327461#comment-17327461
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Flink Jira Bot commented on FLINK-20611:
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This major issue is unassigned and itself and all of its Sub-Tasks have not
been updated for 30 days. So, it has been labeled "stale-major". If this ticket
is indeed "major", please either assign yourself or give an update. Afterwards,
please remove the label. In 7 days the issue will be deprioritized.
> Support 2 phase local aggregate for window aggregate operation
> --------------------------------------------------------------
>
> Key: FLINK-20611
> URL: https://issues.apache.org/jira/browse/FLINK-20611
> Project: Flink
> Issue Type: New Feature
> Components: Table SQL / API, Table SQL / Planner
> Reporter: Suhan Mao
> Priority: Major
> Labels: stale-major
>
> In our company, many jobs run with window aggregate and suffer from large
> amounts of intermediate shuffle. If we can enable 2 phase local agg on window
> aggregate, the performance will be improved.
> This issue aims to support 2 phase local agg in window aggregate operator
> both in SQL and Table API. Simple tumble window will be supported in the
> first place.
>
> We still use below configurations, but they take effect only inside each
> single window.
> {{table.exec.mini-batch.enabled}}
> {{table.exec.mini-batch.allow-latency}}
> {{table.exec.mini-batch.size}}
>
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