First of all: what makes you think that FreeBSD does not do disk caching? https://www.freebsd.org/doc/en_US.ISO8859-1/books/arch-handbook/vm.html https://www.f

First of all: what makes you think that FreeBSD does not do disk caching? https://www.freebsd.org/doc/en_US.ISO8859-1/books/arch-handbook/vm.html https://www.freebsd.org/doc/en_US.ISO8859-1/books/arch-handb... enought memory like 8GB+ you don't have to use swap at all. ...depending on usage. We have 64GB+ machines at work that regularly go swapping. It depends on various factors: how quick do you want the OOM killer to kick in, how slow do you want the system to get as a result of swapping, and how much budget is there available to buy machines that can take more memory.