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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-12731) Heap occupancy based client pushback
Date Fri, 19 Dec 2014 19:57:15 GMT
Andrew Purtell created HBASE-12731:
--------------------------------------

             Summary: 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


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: 90%). 

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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