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Re: H800 + md1200 Performance problem

From: Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>
To: Claudio Freire <klaussfreire(at)gmail(dot)com>
Cc: Tomas Vondra <tv(at)fuzzy(dot)cz>, pgsql-performance(at)postgresql(dot)org
Subject: Re: H800 + md1200 Performance problem
Date: 2012-04-04 16:31:28
Message-ID: CAOR=d=193fmu6=H0Um-OxMTVbNxBK9ucSoqyyExQSRJ-LJ++cQ@mail.gmail.com (view raw or flat)
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Lists: pgsql-performance
On Wed, Apr 4, 2012 at 10:28 AM, Claudio Freire <klaussfreire(at)gmail(dot)com> wrote:
> On Wed, Apr 4, 2012 at 1:22 PM, Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com> wrote:
>> Even with fairly late model linux kernels (i.e.
>> 10.04 LTS through 11.04) I've watched the kswapd start up swapping
>> hard on a machine with zero memory pressure and no need for swap.
>> Took about 2 weeks of hard running before kswapd decided to act
>> pathological.
>
> Perhaps you had some overfull partitions in tmpfs?

Nope.  Didn't use tmpfs for anything on that machine.  Stock Ubuntu
10.04 with Postgres just doing simple but high traffic postgres stuff.

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