About node-red memory handling

General
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I have a question about memory handling.
Assuming we have a node that uses a lot of memory (through msg.payload object), when will the memory be cleared and by who? Would the used memory be cleared after the node is completed or flow is completed?

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This might get you started:

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Thanks for providing the guide.
Does Node-RED have a mechanism to limit, extend, monitor memory usage on top of Node.js?
For example, if I want to understand which node in my flow use-up most of memory, or if I want to check memory leak, is there a good practice to do so?

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HI @fangzhu

Node-RED doesn't provide anything above what is provided by the base Node.js runtime. There is no easy way for us to say "Node A is using X amount of memory".

With regard diagnosing Memory Leaks, I don't have any specific tips for you. It's an area I've not played with a huge amount. There certainly are tools out there that can help. For example, Clinic.js from Nearform looks very interesting - https://clinicjs.org/ - but I've not had a chance to play with it yet.

Nick

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