Benjamin LaHaise wrote:

>Only db2 uses vectored io heavily.  Oracle does not, and none of the open 
>source databases do.  Vectored io is pretty useless for most people.
>  
>
writev is extremely important for networking as it avoids small packets.

Why do people have such tunnel vision around aio to disk?  Aio to 
network is far more important, as networks are much slower than disks.