Matt Gilman commented on NIFI-3599:

[~mosermw] We currently have an about endpoint that we use to relay server-side 
information to the front end (content viewer uri, version, timezone, etc). Some 
of these values come from nifi.properties. I would suggest adding to an 
endpoint like this so that the user knows that the default actual is and 
whether that'sĀ an appropriate value for the connection. Additionally, by still 
populating an actual value in the UI we are guaranteedĀ that the same value will 
be applied across the cluster. If we allowed the user to specify a blank value 
or 'default' alias then if nodes have different defaults, we would have 
inconsistent flow configurations.

> 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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