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https://issues.apache.org/jira/browse/YARN-6682?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daryn Sharp updated YARN-6682:
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Attachment: YARN-6682.branch-2.8.patch
YARN-6682.branch-2.patch
YARN-6682.trunk.patch
Simply uses primitive arrays indexed on ordinal. Differences between branches
is trivial: ex. generics removal, containerId vs rmContainer.
> Improve performance of AssignmentInformation datastructures
> -----------------------------------------------------------
>
> Key: YARN-6682
> URL: https://issues.apache.org/jira/browse/YARN-6682
> Project: Hadoop YARN
> Issue Type: Sub-task
> Affects Versions: 2.8.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Attachments: YARN-6682.branch-2.8.patch, YARN-6682.branch-2.patch,
> YARN-6682.trunk.patch
>
>
> {{AssignmentInformation}} is inefficient and creates lots of garbage that
> increase gc pressure. It creates 3 hashmaps that each contain only 2
> enum-based keys. This requires wrapper node objects, boxing/unboxing of ints,
> and more expensive lookups than simply using primitive arrays indexed by enum
> ordinal.
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