> how did the developers come up with 66 gigabytes of ram to use for these instances in the first place? The high-memory quadruple extra large (no, I'm not mak

> how did the developers come up with 66 gigabytes of ram to use for these instances in the first place? The high-memory quadruple extra large (no, I'm not making that name up) instance offers 68.4GB of ram. Presumably they left the rest for the OS.