The problem isn't the page granularity, which is just a convenient size for the general case and works pretty well in most cases. The problem is to not keep ex

The problem isn't the page granularity, which is just a convenient size for the general case and works pretty well in most cases. The problem is to not keep excessive data in memory; in this case, they are keeping ALL data in memory due to some architectural decisions. OS caching and paging have work pretty well in keeping the frequently used data in memory and leave the rest on disk, and thus utilize the system resource more efficiently.