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https://issues.apache.org/jira/browse/HBASE-12217?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14596548#comment-14596548
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Sean Busbey commented on HBASE-12217:
-------------------------------------
Understood. I only meant to provide an example of how we'd make use of an
expanded set of host metrics elsewhere in the codebase if the chosen library
included them.
Apologies for not making that clearer.
> System load average based client pushback
> -----------------------------------------
>
> Key: HBASE-12217
> URL: https://issues.apache.org/jira/browse/HBASE-12217
> Project: HBase
> Issue Type: New Feature
> Reporter: Andrew Purtell
> Assignee: Andrew Purtell
> Fix For: 2.0.0, 1.3.0
>
>
> If a RegionServer host is already heavily loaded* then it might not be best
> to accept more work in the form of coprocessor invocations. This could
> generalize to all RPC work, perhaps as part of a broader admission control
> initiative, but I think it makes sense to start small in an obvious place.
> *: We could use % CPU utilization or the UNIX 1min or 5min load average to
> determine this, and provide an option for choosing between those
> alternatives.
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