[wellylug] High load averages but no apparent cause

[tink]

On 28 March 2010 20:33, David Harrison <david.harrison at stress-free.co.nz> wrote:
> The migration did reveal something about Ubuntu's default RAID5
> configuration, it is very poorly tuned :-)
> 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.



Cheers,
Andrej