>> Next time, open the task manager before starting the render, to see how
>> it goes.
>
> I am using Process Hacker 2. Not sure how to monitor swap usage. I can
> only find the option to monitor physical memory, which does not take
> long to deplete.

You need to look how much RAM the POV process is using. If it's anywhere 
near the amount of physical RAM in your machine then it's going to start 
causing major slowdowns.

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