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From: Andrea Suisani <sickpig@opinioni.net>
To: Scott Marlowe <scott.marlowe@gmail.com>
Cc: Claudio Freire <klaussfreire@gmail.com>
Cc: Craig James <cjames@emolecules.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Two identical systems, radically different performance
Date: Mon, 15 Oct 2012 17:56:44 +0200
Message-ID: <507C323C.2090805@opinioni.net> (raw)
In-Reply-To: <CAOR=d=02vBk24Mt7cJd9SBxjAcL26Ao=N_8o7ZxB-qe0VW1T8A@mail.gmail.com>
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On 10/15/2012 05:34 PM, Scott Marlowe wrote:
> On Mon, Oct 15, 2012 at 9:28 AM, Claudio Freire <klaussfreire@gmail.com> wrote:
>> On Mon, Oct 15, 2012 at 12:24 PM, Andrea Suisani <sickpig@opinioni.net> wrote:
>>> sure you're right.
>>>
>>> It's just that my bet was on a higher throughput
>>> when HT was isabled from the BIOS (as you stated
>>> previously in this thread).
>>
>> Yes, mine too. It's bizarre. If I were you, I'd look into it more
>> deeply. It may be a flaw in your test methodology (maybe you disabled
>> the wrong cores?). If not, it would be good to know why the extra TPS
>> to replicate elsewhere.
>
> I'd recommend more synthetic benchmarks when trying to compare systems
> like this.  bonnie++, the memory stream test that Greg Smith was
> working on, and so on.  Get an idea what core differences the machines
> display under such testing.
>

Will try tomorrow
thanks for the hint

Andrea




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