Re: [HACKERS] Sun Donated a Sun Fire T2000 to the PostgreSQL

On 22-6-2006 15:03, David Roussel wrote:
> Sureky the 'perfect' line ought to be linear?  If the performance was
> perfectly linear, then the 'pages generated' ought to be G times the
> number (virtual) processors, where G is the gradient of the graph.  In
> such a case the graph will go through the origin (o,o), but you graph
> does not show this.
>
> I'm a bit confused, what is the 'perfect' supposed to be?

First of all, this graph has no origin. Its a bit difficult to test with
less than one cpu.

Anyway, the line actually is linear and would've gone through the
origin, if there was one. What I did was take the level of the
'max'-line at 1 and then multiply it by 2, 4, 6 and 8. So if at 1 the
level would've been 22000, the 2 would be 44000 and the 8 176000.

Please do notice the distance between 1 and 2 on the x-axis is the same
as between 2 and 4, which makes the graph a bit harder to read.

Best regards,

Arjen