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https://issues.apache.org/jira/browse/GIRAPH-104?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Avery Ching updated GIRAPH-104:
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Attachment: GIRAPH-104.diff
> Save half of maximum memory used from messaging
> -----------------------------------------------
>
> Key: GIRAPH-104
> URL: https://issues.apache.org/jira/browse/GIRAPH-104
> Project: Giraph
> Issue Type: Improvement
> Reporter: Avery Ching
> Assignee: Avery Ching
> Priority: Critical
> Attachments: GIRAPH-104.diff
>
>
> Currently, the amount of memory that Giraph uses for messaging is huge. This
> JIRA will reduce the messaging memory by half and provide periodic updates of
> memory for debugging. Details are below:
> Refactored RandomMessageBenchmark to an internal vertex class. Added
> aggregators to RandomMessagesBenchmark to track bytes, messages, and time for
> the messaging. Adjusted the postSuperstep() to be called after the flush()
> for more accurate timings.
> Added periodic minute updates for message flushing (which can take a while,
> especially on the memory benchmark). This helps to see how progress is going
> and gives an ETA.
> Memory optimizations include:
> - Clear the message list after computation
> - Free vertex messages on the source as the flush is going on
> - TreeMap -> HashMap for VertexMutations
> - Sizing the ArrayList properly in transientInMessages
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