[jira] [Created] (APEXCORE-684) Back pressure can create a bursty flow in the input operators and increased window duration for some windows and short for others

["Pramod Immaneni (JIRA)" <ji...@apache.org>]

Pramod Immaneni created APEXCORE-684:
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             Summary: Back pressure can create a bursty flow in the input operators and increased window duration for some windows and short for others
                 Key: APEXCORE-684
                 URL: https://issues.apache.org/jira/browse/APEXCORE-684
             Project: Apache Apex Core
          Issue Type: Improvement
            Reporter: Pramod Immaneni
            Assignee: Pramod Immaneni


In an application where the processing rate of downstream operators is slower than the input operator consumption rate, back pressure will kick in and eventually propagate to the input operator. This will block the input operator till there is space available in the buffers and consequently block the window and increase the window duration for some windows and reduce it significantly for others. If the backpressure feedback can potentially be used by the engine to slow down the scheduling of data emission from input operator, a.k.a call to emitTuples method in input operator, it can lead to much more uniform and steady behavior.



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