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Date:      Tue, 27 Mar 2012 16:27:20 +0200
From:      Ivan Voras <ivoras@freebsd.org>
To:        "Samuel J. Greear" <sjg@evilcode.net>
Cc:        "hackers@freebsd.org" <hackers@freebsd.org>, Doug Barton <dougb@freebsd.org>
Subject:   Re: PostgreSQL benchmarks (now with Linux numbers)
Message-ID:  <CAF-QHFX4JThkm_Xd3Ya4NZw-iHtNAvfebksLF1bPJ%2BDLB6L8-g@mail.gmail.com>
In-Reply-To: <CANY-Wm9%2BZzavsJqZ=4_66gZxt7ehh%2BAZTbeAZxAz7Tkg=syabA@mail.gmail.com>
References:  <b1732c99-eec2-4097-ad9c-f58979addf9f@email.android.com> <4F45AB76.5050201@FreeBSD.org> <CANY-Wm9%2BZzavsJqZ=4_66gZxt7ehh%2BAZTbeAZxAz7Tkg=syabA@mail.gmail.com>

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>> On 02/22/2012 01:42, Ivan Voras wrote:
>> > The Dragonfly team has recently liberated their VM from the giant lock
>> > and there are some interesting benchmarks comparing it to FreeBSD 9 and a
>> > derivative of RedHat Enterprise Linux:

> I just saw this, so I thought I would mention -- DragonFly was not doing a
> great job allocating pv entries rapidly, which is needed during PostgreSQL
> warm up -- This made shm_use_phys appear very effective. It only makes 1-2%
> difference now on DragonFly, and only 1-2% difference on FreeBSD.

Great!

Do you have a link to the updated results?



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