Question
Imagine you're building a process where a task should be assigned to every member of a group after process initiation. If you add a task node to your process model
- how do you enable Multi Node Instances (MNI) for the task node in question? (Junior)
- What is the default constraint on number of instances instances of the task the node will generate? (Junior/Senior)
- If your group contains more members than the limit on instances, where do you need to update the "MAX_NODE_INSTANCES" property? (Senior)
- What approach does Appian recommend instead of changing the "MAX_NODE_INSTANCES" property? (Junior)
I
iamgmdev
June 28, 2026
16
Answer
- To enable MNI for a given task node:
- navigate to the task node within your process modeler
- double click the node to open the node configuration dialog box
- navigate to the "Other" tab within the configuration details
- check the "Automatically run multiple instances of this node" box
- The default MNI constraint is 1000 instances, but this can be increased up to 150,000 by an administrator.
- If your group contains more than 1000 members, an administrator may need to update the "MAX_NODE_INSTANCES" property (part of the "server.conf.processcommon" collection of custom properties) within the "Appian Custom Resource (CR) Configuration File"
- A process designed to handle 10 tasks should be designed differently than a process designed to handle 100,000 tasks.
- If your process does not control for the performance challenges associated with handling an indeterminately large set of actions, you potentially open yourself up to inconsistencies in user experience, process delays, etc.
- While there are certainly use cases where you may need to scale from 10 actions to 100k on a regular basis, if those actions are not performed in the same amount of time / with the same number of resources, it may be worth while building batching into your design, with opportunities in between batches to present progress via the UI, log task success, etc.
JuniorSeniorProcess Models#mni
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