@milan with that much ram i would recommend to try zram. Depending on the workload, it can be very much worth it. The 3 main servers at work have 256GB of RAM, and have 4x 20GB zram swap active. There is 22,5GB worth of swap in them, which only occupies 11GB. vm.swappiness is set to 30. This lead to lower iowait while having memory pressure and glusterfs doing its thing.