Re: OT: performance problems.

[Brian Nelson <nelson@bignachos.com>]

csj <csj@mindgate.net> writes:

> On Mon, 7 Jan 2002 15:59:20 +0100
> martin f krafft <madduck@madduck.net> wrote:
> 
> > also sprach Christoph Simon <ciccio@kiosknet.com.br> [2002.01.07.1547 +0100]:
> > > > is this good or bad? hda2 is my swap partition:
> > > 
> > > This is bad (<1/6).
> > 
> > what do you mean?
> > 
> > > > /dev/hda2:
> > > >  Timing buffer-cache reads:   128 MB in  0.99 seconds = 129.29 MB/sec
> > > >  Timing buffered disk reads:  64  MB in 21.93 seconds =   2.92 MB/sec
> > > 
> > > /dev/hda1:
> > >  Timing buffer-cache reads:   128 MB in  0.77 seconds =166.23 MB/sec
> > >  Timing buffered disk reads:  64 MB in  3.33 seconds = 19.22 MB/sec
> > 
> > jealous! what's the RPM on your drive?
> 
> Are you sure it's something to get jealous over? I'm pretty sure I have
> a 5400rpm 20GB drive (by Fujitsu). Look at my stats after I enabled DMA and
> (some other kernel options I don't have at the tip of my finger right
> now):
> 
> # hdparm -Tt /dev/hda
> 
> /dev/hda:
>  Timing buffer-cache reads:   128 MB in  0.82 seconds =156.10 MB/sec
>  Timing buffered disk reads:  64 MB in  2.99 seconds = 21.40 MB/sec
> 
> I've seen a discussion here some whiles back about a guy who got
> 33MB+/sec.

It's all about scsi baby...

/dev/sdb:
 Timing buffer-cache reads:   128 MB in  0.78 seconds =164.10 MB/sec
 Timing buffered disk reads:  64 MB in  1.62 seconds = 39.51 MB/sec

-- 
Brian Nelson <nelson@bignachos.com>