[jira] [Created] (TEZ-3168) Provide a more predictable approach for total resource guidance for wave/split calculation

["Hitesh Shah (JIRA)" <ji...@apache.org>]

Hitesh Shah created TEZ-3168:
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             Summary: Provide a more predictable approach for total resource guidance for wave/split calculation 
                 Key: TEZ-3168
                 URL: https://issues.apache.org/jira/browse/TEZ-3168
             Project: Apache Tez
          Issue Type: Bug
            Reporter: Hitesh Shah
            Assignee: Hitesh Shah


Currently, Tez uses headroom for checking total available resources. This is flaky as it ends up causing the split count to be determined by a point in time lookup at what is available in the cluster. A better approach would be either the queue size or even cluster size to get a more predictable count. 



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