I've created some job (weather forecasting) and it is a heavy load, mostly CPU and memory, for a long(er) time. I notice that when I'm running the job from the cli I can still use my browser without stuttering. But when I move the same job to a cron job there are stutters all over the place.
I think this has to do with the way that CFS scheduling from the kernel will group processes (by tty). See e.g. here for documentation.
Now that link does provide some pointers on how to fix it, possibly. But I was wondering if anyone has already done such a thing and what the results were.
Linux xyz 4.4.0-170-generic #199-Ubuntu SMP Thu Nov 14 01:45:04 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux