| From: | François Beausoleil <francois(at)teksol(dot)info> |
|---|---|
| To: | Ray Stell <stellr(at)vt(dot)edu> |
| Cc: | Forums postgresql <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Linux vs FreeBSD |
| Date: | 2014-04-04 13:11:43 |
| Message-ID: | 3C376829-1A8A-42C8-ADA1-90A6E0F54878@teksol.info |
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| Lists: | pgsql-general |
Le 2014-04-04 à 08:11, Ray Stell a écrit :
>
> On Apr 4, 2014, at 12:03 AM, François Beausoleil <francois(at)teksol(dot)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/s that are also on the SAN? You'll need to relate the wait events to your activities. I've been squeezed like that in the past.
There are no SAN: it's a dedicated machine, dedicated hardware. As John Pierce guessed, having more disks would help. I should probably look more towards that than switching OS.
Thanks!
François
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