Re: OT: performance problems.
On Wednesday 09 January 2002 00:00, Brian Nelson wrote:
> 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
Well, IDE is not that bad...
/dev/hda:
Timing buffer-cache reads: 128 MB in 0.68 seconds =188.24 MB/sec
Timing buffered disk reads: 64 MB in 3.20 seconds = 20.00 MB/sec
/dev/hdb:
Timing buffer-cache reads: 128 MB in 0.67 seconds =191.04 MB/sec
Timing buffered disk reads: 64 MB in 4.01 seconds = 15.96 MB/sec
--
Meir Kriheli
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