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https://issues.apache.org/jira/browse/BEAM-13541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17549772#comment-17549772
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Danny McCormick commented on BEAM-13541:
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This issue has been migrated to https://github.com/apache/beam/issues/21345
> Use runtime information to improve CoGroupByKey caching
> -------------------------------------------------------
>
> Key: BEAM-13541
> URL: https://issues.apache.org/jira/browse/BEAM-13541
> Project: Beam
> Issue Type: Improvement
> Components: sdk-ideas
> Reporter: Sunil Pedapudi
> Priority: P3
> Fix For: 2.36.0
>
> Time Spent: 6.5h
> Remaining Estimate: 0h
>
> Currently, CoGroupByKey creates UnionTables that are Flattened. The Flattened
> output is processed by a GroupByKey to produce a CoGbkResult (via
> ConstructCoGbkResultFn).
>
> Given the performance of CoGBK is greatly impacted based on the which
> elements are cached in the (finitely sized) in-memory results, it would be
> useful if CoGbkResult can use runtime information to prioritize which
> elements are stored in-memory.
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