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https://issues.apache.org/jira/browse/HBASE-12217?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14310910#comment-14310910
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Andrew Purtell commented on HBASE-12217:
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I recently came across [metrics-sigar|https://github.com/cb372/metrics-sigar],
which integrates Coda Hale's Metrics with the
[SIGAR|https://support.hyperic.com/display/SIGAR/Home] cross-platform
native-based library for gathering system information. It's interesting but of
course requires native binaries be deployed and a system property set to point
to them. Since we are just interested in system load I think we are better off
doing it like YARN does: a generic interface (ResourceCalculatorPlugin) and
OS-specific implementations (like LinuxResourceCalculatorPlugin, which knows
how to parse procfs), but let's mention both options.
> 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
>
> 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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