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https://issues.apache.org/jira/browse/FLINK-12070?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16855013#comment-16855013
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Stefan Richter commented on FLINK-12070:
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I have one more additional question: can you share the heap size of your JVM
and also the ratio of JVM heap to total physical memory? Possible that the new
implementation could perform better with different memory settings, i.e. only
the required size for JVM heap and keeping more physical memory available for
mmap - please note that mmap does not account for heap size, but for process
memory.
> Make blocking result partitions consumable multiple times
> ---------------------------------------------------------
>
> Key: FLINK-12070
> URL: https://issues.apache.org/jira/browse/FLINK-12070
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Network
> Affects Versions: 1.9.0
> Reporter: Till Rohrmann
> Assignee: Stephan Ewen
> Priority: Blocker
> Labels: pull-request-available
> Fix For: 1.9.0
>
> Attachments: image-2019-04-18-17-38-24-949.png
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> In order to avoid writing produced results multiple times for multiple
> consumers and in order to speed up batch recoveries, we should make the
> blocking result partitions to be consumable multiple times. At the moment a
> blocking result partition will be released once the consumers has processed
> all data. Instead the result partition should be released once the next
> blocking result has been produced and all consumers of a blocking result
> partition have terminated. Moreover, blocking results should not hold on slot
> resources like network buffers or memory as it is currently the case with
> {{SpillableSubpartitions}}.
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