I simulated a rather simple Stan model using 6 cores, which used around 6GB of RAM. The machine used to simulate has 126GB of RAM and 16 cores. I was contacted by colleagues that my simulations slowed-down their RStudio Server connections so significantly, that loading the starting pages took minutes rather than seconds. After I killed the jobs all worked as usual again.
Now my question: Given that the machine had 10 idle cores and around 120GB of RAM remaining, what could have slowed down the system so significantly? Is there any significant I/O going on during simulations?