Anubhav Dhoot created YARN-3119:
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             Summary: Memory limit check need not be enforced unless aggregate 
usage of all containers is near limit
                 Key: YARN-3119
                 URL: https://issues.apache.org/jira/browse/YARN-3119
             Project: Hadoop YARN
          Issue Type: Improvement
            Reporter: Anubhav Dhoot


Today we kill any container preemptively even if the total usage of containers 
for that is well within the limit for YARN. Instead if we enforce memory limit 
only if the total limit of all containers is close to some configurable ratio 
of overall memory assigned to containers, we can allow for flexibility in 
container memory usage without adverse effects. This is similar in principle to 
how cgroups uses soft_limit_in_bytes.




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