Re: PostgreSQL and Ultrasparc T1

Jignesh,

On 12/19/05 12:21 PM, "Jignesh Shah" <J(dot)K(dot)Shah(at)Sun(dot)COM> wrote:

> extended device statistics
> r/s w/s Mr/s Mw/s wait actv wsvc_t asvc_t %w %b device
> 0.8 14.0 0.0 0.0 0.0 0.3 0.0 17.8 0 4 c3t0d0
> 91.4 0.0 91.4 0.0 0.0 1.0 0.0 10.5 0 96 c0t40d0
> 96.0 0.0 96.0 0.0 0.0 1.0 0.0 10.0 0 96 c5t40d1
> 95.8 0.0 95.8 0.0 0.0 1.0 0.0 10.0 0 96 c0t40d1
> 96.8 0.0 96.8 0.0 0.0 1.0 0.0 9.9 0 96 c5t40d0
> 84.6 0.0 84.6 0.0 0.0 1.0 0.0 11.4 0 96 c4t46d1
> 85.6 0.0 85.6 0.0 0.0 1.0 0.0 11.2 0 96 c4t46d0
> 85.2 0.0 85.2 0.0 0.0 1.0 0.0 11.3 0 96 c2t46d1
> 85.4 0.0 85.4 0.0 0.0 1.0 0.0 11.3 0 96 c2t46d0

Doh! Forget my last message, each of these is a single drive.

Wacky layout though - it looks like c0,c2,c3,c4,c5 - is that 5 controllers
there?

Also - what are the RAID options on this unit?

To get optimal performance on an 8 core unit, would we want to map 1 active
process to each of these drives? Can the CPU run all 8 threads
simultaneously?

- Luke