high swap

I have three Proxmox VE nodes in my environment. Two of them have 4 cores/4 threads, one of them has 4 cores/8 threads. Node 3, the high swap usage one, has the 4 core / 8 thread and 32GB of DDR4 memory and as seen in the picture, it isn't even using 3/4 of the RAM available. The history of the...