Re: Designing database tables for performance?
Date: 6 Mar 2007 12:52:13 -0800
On 6 mar, 05:59, "d..._at_smooth1.co.uk" <d..._at_smooth1.co.uk> wrote:
> On 24 Feb, 13:30, "Cimode" <cim..._at_hotmail.com> wrote:
> > On 23 fév, 22:33, "jgar the jorrible" <joel-ga..._at_home.com> wrote:
> > > > In what RAM would be less physical than HD ? For any reason, an
> > > > absurdity is an absurdity.
> > > Not an absurdity, you just aren't paying attention to how the I/O is
> > > counted.
> > So you say there are *ways* to count IO's. Fair enough. Question is:
> > what has the way of counting IO's has any bearing on the media that
> > supports them and therefore qualifies their nature as physical or
> > logical? What is the difference: speed?
> Yes. A logical I/O does not go down an I/O channel but comes via the
> memory bus.
And in what a memory bus is less *physical* than an IO channel? How do you think such bus is filled with data at some point in time otherwise than by a pull on the IO channel.
> The time to complete is therefore far less and the "cost" in terms of
> time is much less.
So because time is the difference that makes less physical. Don't you see anything wrong in that? Received on Tue Mar 06 2007 - 21:52:13 CET