The OS VM would benefit, the problem is with using the OS VM in order to implement paging in certain applications like Redis. Does not work well because there i

The OS VM would benefit, the problem is with using the OS VM in order to implement paging in certain applications like Redis. Does not work well because there is a tension between flexibility of in-memory representation and data locality, and OS VM needs data locality because it has no info about content and requires logically grouped data to be in near pages. About VM in the general case: yes if for general case you mean, a random process is running and is out of memory. If we are talking about in-memory systems wanting to off-load data to disk IMHO the default is that VM does not work well.