Re: RAID-0 read perf. decrease after 2.4.20

[Marcelo Tosatti]

On Thu, 18 Dec 2003, Mike Fedyk wrote:

> On Thu, Dec 18, 2003 at 11:41:11AM -0200, Marcelo Tosatti wrote:
> > On Tue, 16 Dec 2003, Martin Knoblauch wrote:
> > >  Just some feedback:
> > >
> > > echo 511 > /proc/sys/vm/max-readahead
> > >
> > >  brings back the read performance of my 30 disks on 4 controller
> > > LVM/RAID0.
> >
> > Great.
>
> Maybe a new default is in order?

I believe the defaults have been changed because they harm smaller
workloads.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/