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https://issues.apache.org/jira/browse/FLINK-15037?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16988440#comment-16988440
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Kurt Young commented on FLINK-15037:
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Will this stopping us from supporting floating memory for each operator in the
future?
> Introduce LimittingMemoryManager as operator scope MemoyManager
> ---------------------------------------------------------------
>
> Key: FLINK-15037
> URL: https://issues.apache.org/jira/browse/FLINK-15037
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Coordination
> Affects Versions: 1.10.0
> Reporter: Zhu Zhu
> Priority: Major
>
> Current {{MemoryManager}} is slot scope component, and the operators needs to
> use a fraction to compute memory size/pages it can allocate and use it to
> reserver memory or allocate pages.
> This, however, requires operators to be aware of the managed memory fraction.
> There is also risk that one operator may over allocate resources than it has
> declared and causes other operators to break.
> To separate concerns, we can introduce a {{LimittingMemoryManager}} which
> wraps the the original MemoryManager but limit the available memory size to
> the fraction of total memory governed by the original one. This wrapper would
> be a operator scope {{MemoryManager}}.
> Some more detailed discussions can be found in FLINK-14936.
> cc [~azagrebin]
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