Scott Aslan commented on NIFI-3599:

You are correct that the UI does not have access to nifi.properties but I will 
let [~mcgilman] comment as to whether this approach makes sense on the server 
side. As for the UX, instead of leaving the field blank we should disable it 
and have a checked checkbox next to that field indicating that the 'default' 
values from nifi.properties will be used. Then if the user wants to override 
those values they would uncheck the checkbox and enter the new back pressure 
threshold values...

> Add nifi.properties value to globally set the default backpressure size 
> threshold for each connection
> -----------------------------------------------------------------------------------------------------
>                 Key: NIFI-3599
>                 URL: https://issues.apache.org/jira/browse/NIFI-3599
>             Project: Apache NiFi
>          Issue Type: Improvement
>          Components: Configuration
>            Reporter: Jeremy Dyer
>            Assignee: Jeremy Dyer
>            Priority: Major
> By default each new connection added to the workflow canvas will have a 
> default backpressure size threshold of 10,000 objects. While the threshold 
> can be changed on a connection level it would be convenient to have a global 
> mechanism for setting that value to something other than 10,000. This 
> enhancement would add a property to nifi.properties that would allow for this 
> threshold to be set globally unless otherwise overridden at the connection 
> level.

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