the Simplicity of noSql

A common stated cause is that noSql is faster than Sql bc it's in memory. From a practical viewpoint, this appears to be the main cause.

But, let's talk theoretical: why can't we put an entire relational db in memory

[It sounds to me that the real cause of the performance of noSql is that it uses a simplified set of instructions/that developers have figured out that's all it's needed for that application, thus allowing it to be placed mainly in volatile memory]


http://stackoverflow.com/questions/5329613/relational-db-in-memory