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From "Sean Busbey (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-12217) System load average based client pushback
Date Mon, 22 Jun 2015 17:34:01 GMT

     [ https://issues.apache.org/jira/browse/HBASE-12217?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sean Busbey updated HBASE-12217:
--------------------------------
    Fix Version/s:     (was: 1.2.0)
                   1.3.0

I think we'd be interested in more than just load average if it was available. Over in HBASE-13103
[~lhofhansl] calls out several other metrics we'd want to know about when auto-tuning number
of regions.

> 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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