The obvious difference is that swap files are not as optimized for disk io. There is a serious performance issue if you ever have to hit disk often. It all depe

The obvious difference is that swap files are not as optimized for disk io. There is a serious performance issue if you ever have to hit disk often. It all depends on how you structure your in memory/on disk data. But it might never be an issue, have scaled to tenish million user in memory there is so much else that can go wrong first.