From: Ron Mayer <rm_pg@cheapcomplexdevices.com>
Subject: Re: O_NOATIME
Date: Thu, 03 Aug 2006 13:52:28 -0700
Organization: Hub.Org Networking Services
Lines: 20
Message-ID: <44D2620C.3070506@cheapcomplexdevices.com>
References: <eatmlt$qd7$1@news.hub.org> <25468.1154637504@sss.pgh.pa.us>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
To: Tom Lane <tgl@sss.pgh.pa.us>
User-Agent: Thunderbird 1.5.0.4 (X11/20060713)
In-Reply-To: <25468.1154637504@sss.pgh.pa.us>
To: pgsql-hackers@postgresql.org

Tom Lane wrote:
> Ron Mayer <rm_pg@cheapcomplexdevices.com> writes:
>> Would people be interested in a trivial patch that adds O_NOATIME
>> to open() for platforms that support it?  (apparently Linux 2.6.8
>> and better).
> 
> Isn't that usually, and more portably, handled in the filesystem
> mount options?

Yes to both.  I could imagine that for small systems/workstations
you might have some files that want access time, and others that
wanted NOATIME -- it seems the new flag lets you choose on a
file-by-file bases.

That's why I asked.  I imagine it won't help on any well-administered
production server since they'd probably mount the whole filesystem
that way; but might help a bit on out-of-the-box-default-config
benchmarks done by naive users who don't tweak filesystem settings.

Don't know if we'd care about such an audience or not.