[wellylug] High load averages but no apparent cause

[David Harrison]

On Mon, Mar 29, 2010 at 7:32 AM, tink <andrej at paradise.net.nz> wrote:
>
> > For anyone using Ubuntu and RAID5 I recommend you checkout the following
> > couple of pages and set your stripe_cache_size accordingly:
> > http://randomitblog.blogspot.com/2009/10/ubuntu-raid-tweak.html
> >
> http://peterkieser.com/2009/11/29/raid-mdraid-stripe_cache_size-vs-write-transfer/
> > By changing the stripe_cache_size parameter to 16meg I saw a 10x
> improvement
> > in write operations.
>
> /me coughs ...
>
> just hope the power never fails, and the box never
> hangs before that write was committed to disk.
>
>
Any recommendations?

Ubuntu's default of 256 delivers pathetic write performance.
8192 seems like a good option, but is something between 256 and 8192 a
better compromise for speed/reliability?


David
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.wellylug.org.nz/pipermail/wellylug/attachments/20100329/a85aa7fc/attachment.htm>