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https://issues.apache.org/jira/browse/MAPREDUCE-3810?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinod Kumar Vavilapalli updated MAPREDUCE-3810:
-----------------------------------------------
Status: Patch Available (was: Open)
Patch summary:
- Mostly moving log statements in the heartbeat critical path to debug level
- Added equals/hashCode for priority for faster lookup (the default impl uses
getProto() which becomes costly) and improved comparesTo() in ResourceRequest.
> MR AM's ContainerAllocator is assigning the allocated containers very slowly
> ----------------------------------------------------------------------------
>
> Key: MAPREDUCE-3810
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3810
> Project: Hadoop Map/Reduce
> Issue Type: Sub-task
> Components: mrv2, performance
> Affects Versions: 0.23.0
> Reporter: Vinod Kumar Vavilapalli
> Assignee: Vinod Kumar Vavilapalli
> Priority: Blocker
> Fix For: 0.23.1
>
> Attachments: MAPREDUCE-3810-20120205.txt
>
>
> This is mostly due to logging and other not-so-cheap operations we are doing
> as part of the AM->RM heartbeat cycle.
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