System lag due to kswapd0

I’m running a local installation on Version “low-write 9.8.31 | 2018.06.21”. Since the last update on 06.21 I experience problems with a process called kswapd0. Every now and then it uses a lot of CPU load and slows down the system until it can’t process the inputs anymore. After 30min - 1h everything will go back to normal, but I’m missing data.
I tried to create a small red-node program to trigger a script to stop swapping - without success.
Does anyone have an idea how to handle this issue?

Here’s info on how to determine which process is causing the swapping: