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https://issues.apache.org/jira/browse/NIFI-14797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18011920#comment-18011920
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Michael W Moser commented on NIFI-14797:
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The ControlRate documentation says {{If you configure a very small Time
Duration, then the accuracy of the throttle gets worse. You can improve this
accuracy by decreasing the Yield Duration}}
Based on this guidance, when lowering the ControlRate {{Time Duration}} to
something as low as {{1 sec}} you should also lower the {{Yield Duration}}
setting as well, to something like {{200 millis}}.
[~scoutjohn] Let us know if this helps the accuracy of your flow's use case.
> ControlRate Processor sends fewer FlowFiles than expected in NiFi 2.3
> compared to NiFi 1.28
> -------------------------------------------------------------------------------------------
>
> Key: NIFI-14797
> URL: https://issues.apache.org/jira/browse/NIFI-14797
> Project: Apache NiFi
> Issue Type: Improvement
> Affects Versions: 2.3.0
> Reporter: John Joseph
> Priority: Major
> Attachments: image-2025-07-29-11-00-05-438.png,
> image-2025-07-29-11-00-53-864.png
>
>
> We recently upgraded from NiFi 1.28 to NiFi 2.3 and noticed that the
> *{{ControlRate}}* processor does not honor the configured rate accurately in
> the new version.
> In our use case, the *{{ControlRate}}* is configured with:
> * Rate: 15 flowfiles/second
> * Rate Controlled Criteria: {{FlowFile Count}}
> * Time Duration: {{1 sec}}
> However, the {*}actual average rate is observed to be lower{*}:
> * 15 configured → only ~12.5 observed
> * 18 configured → only ~15 observed
> In NiFi 1.28, the exact configured rate was achieved. The flow design remains
> unchanged, with 3-4 intermediate processors (all with 0 sec run scheduling
> interval) between {{ControlRate}} and {{{}InvokeHTTP{}}}.
> This appears to be a *behavioral change* in +_2.3_+
> We request the team to:
> * Investigate potential regressions in how {{ControlRate}} behaves in the
> newer version.
> * Provide guidance or improvements to ensure accurate rate control,
> especially in batch/integration use cases.
> +*2.3*+
> !image-2025-07-29-11-00-53-864.png!
>
> +*1.28*+
> !image-2025-07-29-11-00-05-438.png!
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