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Date: Thu, 22 Jan 2015 03:07:35 +0000 (UTC)
From: "Andrew Purtell (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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Subject: [jira] [Updated] (HBASE-12731) Heap occupancy based client pushback
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     [ https://issues.apache.org/jira/browse/HBASE-12731?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Purtell updated HBASE-12731:
-----------------------------------
    Attachment: HBASE-12731.patch

Patch with new test

> 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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