FreeBSD IO Performance (was Re: Quality of FreeBSD)

[Bohdan Horst]

On Mon, Jul 25, 2005 at 10:15:41PM +1200, Mark Kirkwood wrote:
> Hmm - looks like I missed that thread, never mind - repeatability of 
> findings is sound scientific principle :-)
> 
> With respect to changing the default for vfs.read_max - makes sense to 
> me, but it would be interesting to know if anyone has a system that 
> performs *worse* with it set to 16.
> 
> regards
> 
> Mark
> 
> Chris wrote:
> >Its been mentioned before and most experience the same as you by
> >setting it to 16 a dramatic improvement in the sequential read, I
> >currently run all my 5.x servers like this with no issues as a result.
> > I am curious if the default will ever be changed.

on my notebook:
IBM TP 600x
5.4-RELEASE-p4
ad0: 38154MB <IC25N040ATCS04-0/CA4OA71A> [77520/16/63] at ata0-master UDMA33
APM enable (but same effect with disable APM)
AAC unfortunatelly not supported :(


anything above vfs.read_max=1 produce very annoying little sound (i can
hear disk heads) when playing movies..

my 2 cents

-- 
Bohdan 'Nexus' Horst