The “NoSQL” dispute: A performance argument
In summary, blinding performance depends on removing overhead. Such overhead has nothing to do with SQL, but instead revolves around traditional implementations of ACID transactions, multi-threading, and disk management. To go wildly faster, one must remove all four sources of overhead, discussed above. This is possible in either a SQL context or some other context. …
But as far as I know there is no easy way to tweak any of these “features” of existing RDBMS.
via: http://sillybits.wordpress.com/2009/12/10/the-nosql-dispute-a-performance-argument/
