From: Shaun Thomas <sthomas@optionshouse.com>
To: Scott Marlowe <scott.marlowe@gmail.com>
Cc: Claudio Freire <klaussfreire@gmail.com>
Cc: David Boreham <david_list@boreham.org>
Cc: pgsql-performance@postgresql.org
Subject: Re: hardware advice
Date: Thu, 27 Sep 2012 16:44:11 -0500
Message-ID: <5064C8AB.2020909@optionshouse.com> (raw)
In-Reply-To: <CAOR=d=3qhRGyub0H9eFm+9KPYoa_YkA1U1+Fy_4qyokK8ztWaA@mail.gmail.com>
References: <5064A4DC.5090304@turnkey.bz>
<5064ABA1.7030507@boreham.org>
<5064BB66.2080202@optionshouse.com>
<5064C033.90506@boreham.org>
<CAGTBQpaT6=4hJadHWuLzQ=JeBTXLE_8_oFB4P42NVKXvqmC0kg@mail.gmail.com>
<CAOR=d=1zkfc_Q=6p5Oem6CcFHrKo_z3Km6AEMHkRj_2321d2Rg@mail.gmail.com>
<CAOR=d=3qhRGyub0H9eFm+9KPYoa_YkA1U1+Fy_4qyokK8ztWaA@mail.gmail.com>
On 09/27/2012 04:39 PM, Scott Marlowe wrote:
> Clarification that the two base machines were about the same price.
> 48 opteron cores (2.2GHz) or 16 xeon cores at ~2.6GHz. It's been a
> few years, I'm not gonna testify to the exact numbers in court.
Same here. We got really good performance on Opteron "a few years ago"
too. :)
But some more anecdotes... with the 4x8 E7450 Dunnington, our
performance was OK. With the 2x6x2 X5675 Nehalem, it was ridiculous.
Half the cores, 2.5x the speed, so far as pgbench was concerned. On
every workload, on every level of concurrency I tried. Like you said,
the 7450 dropped off at higher concurrency, but the 5675 kept on trucking.
That's why I qualified my statement about Intel CPUs as "lately." They
really seem to have cleaned up their server architecture.
--
Shaun Thomas
OptionsHouse | 141 W. Jackson Blvd. | Suite 500 | Chicago IL, 60604
312-444-8534
sthomas@optionshouse.com
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To: pgsql-performance@postgresql.org
Cc: sthomas@optionshouse.com, scott.marlowe@gmail.com, klaussfreire@gmail.com, david_list@boreham.org
Subject: Re: hardware advice
In-Reply-To: <5064C8AB.2020909@optionshouse.com>
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