On Fri, Sep 9, 2011 at 11:55 AM, Antonio Rodriges <antonio.rrz@gmail.com> wrote:
> Hello,
>
> Does anyone know whether PostgreSQL uses DMA (Direct Memory Access) in
> certain cases to improve networking IO performance?
>
> I mean "simple" query is which doesn't require any CPU processing, for ex
> SELECT column_a FROM table_b WHERE date = "2001-10-05"
>
> I need this to devise the best logic for the system with PostgreSQL as
> a layer. Certainly I could study PostgreSQL sources or test it with a
> simple application but I hope PostgreSQL experts are aware of this
> feature.
That's all up to your hardware and OS, not postgresql