Le 2014-04-04 à 08:11, Ray Stell a écrit :
>
> On Apr 4, 2014, at 12:03 AM, François Beausoleil <francois@teksol.info> wrote:
>
>> I have some performance issues on a Ubuntu 12.04 which I'd like to resolve. iowait varies a lot, between 5 and 50%.
>
> Is the SAN dedicated to this app? I wonder if the i/o, if not related to your app, is being pressed by some other
system/sthat are also on the SAN? You'll need to relate the wait events to your activities. I've been squeezed like
thatin the past.
There are no SAN: it's a dedicated machine, dedicated hardware. As John Pierce guessed, having more disks would help. I
shouldprobably look more towards that than switching OS.
Thanks!
François