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https://issues.apache.org/jira/browse/GIRAPH-1056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15258565#comment-15258565
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Hassan Eslami commented on GIRAPH-1056:
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Thanks Maja for reviewing and committing the diff.
> Setting auto-read in Netty to false
> -----------------------------------
>
> Key: GIRAPH-1056
> URL: https://issues.apache.org/jira/browse/GIRAPH-1056
> Project: Giraph
> Issue Type: Improvement
> Reporter: Hassan Eslami
> Assignee: Hassan Eslami
> Priority: Minor
>
> By default, auto-read flag is set to true in Netty. This means Netty
> proactively read requests as they become available to a worker. However, this
> behavior sometime causes the off-heap memory to increase continuously. This
> happens specifically in presence of a spike in the amount of received
> requests. In that situation, the processing/handling rate of incoming
> requests may be less than the request receipt rate leading to high-memory
> kill (CGroup kill or OOM). With auto-read flag set to false, we read and
> process requests one by one and (hopefully/presumably) letting the transport
> layer do the flow control (i.e. dropping packets or reducing congestion
> window of TCP).
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