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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12731) Heap occupancy based client pushback
Date Thu, 22 Jan 2015 04:31:35 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14286945#comment-14286945
] 

Andrew Purtell commented on HBASE-12731:
----------------------------------------

Precommit build was killed:
{noformat}
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build@2/dev-support/test-patch.sh: line
704:  7293 Killed                  $MVN clean test -Dsurefire.rerunFailingTestsCount=2 -P
runAllTests -D${PROJECT_NAME}PatchProcess
{noformat}


> Heap occupancy based client pushback
> ------------------------------------
>
>                 Key: HBASE-12731
>                 URL: https://issues.apache.org/jira/browse/HBASE-12731
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Andrew Purtell
>            Assignee: Andrew Purtell
>             Fix For: 2.0.0, 0.98.10, 1.1.0
>
>         Attachments: HBASE-12731.patch, HBASE-12731.patch
>
>
> If the heap occupancy of a RegionServer is beyond a configurable high water mark (suggestions:
95%, 98%) then we should reject all user RPCs and only allow administrative RPCs until occupancy
has dropped below a configurable low water mark (suggestions: 92%). 
> Implement building on the HBASE-5162 changes.
> It might be expensive to check heap occupancy, in which case we can sample it periodically
with a chore and use the last known value in pushback calculations. 



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