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https://issues.apache.org/jira/browse/APEXCORE-570?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15630072#comment-15630072
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Thomas Weise commented on APEXCORE-570:
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>From the JIRA description, this sounds like a combination of backpressure with
>configurable limit on the queue. For the intra-process case the queue capacity
>can be set. For buffer server, it will spill over to disk, hence the upstream
>operator will produce at the speed of spooling. Are you thinking of a capacity
>limit here?
> Prevent upstream operators from getting too far ahead when downstream
> operators are slow
> ----------------------------------------------------------------------------------------
>
> Key: APEXCORE-570
> URL: https://issues.apache.org/jira/browse/APEXCORE-570
> Project: Apache Apex Core
> Issue Type: Improvement
> Reporter: Pramod Immaneni
> Assignee: Pramod Immaneni
>
> If the downstream operators are slower than upstream operators then the
> upstream operators will get ahead and the gap can continue to increase.
> Provide an option to slow down or temporarily pause the upstream operators
> when they get too far ahead.
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