From: Steve Crawford <scrawford@pinpointresearch.com>
To: Magnus Hagander <magnus@hagander.net>
Cc: Ow Mun Heng <Ow.Mun.Heng@wdc.com>
Cc: Tomas Vondra <tv@fuzzy.cz>
Cc: Ketema <ketema@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Hardware for PostgreSQL
Date: Thu, 01 Nov 2007 11:16:13 -0700
Message-ID: <472A17ED.1070008@pinpointresearch.com> (raw)
In-Reply-To: <472985B5.6010701@hagander.net>
References: <1193849108.591961.103570@22g2000hsm.googlegroups.com>
<4728FAA1.7060905@fuzzy.cz>
<1193889182.7999.71.camel@neuromancer.home.net>
<4729783A.2030201@hagander.net>
<1193903161.9148.27.camel@neuromancer.home.net>
<472985B5.6010701@hagander.net>
Magnus Hagander wrote:
> Ow Mun Heng wrote:
>>> You're likely better off (performance-wise) putting it on the same disk
>>> as the database itself if that one has better RAID, for example.
>> I'm thinking along the lines of since nothing much writes to the OS
>> Disk, I should(keyword) be safe.
>
> Unless it's *always* in the cache (not so likely), reads will also move
> the heads...
And if you aren't mounted noatime, reads will also cause a write.
Cheers,
Steve
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To: pgsql-performance@postgresql.org
Cc: scrawford@pinpointresearch.com, magnus@hagander.net, Ow.Mun.Heng@wdc.com, tv@fuzzy.cz, ketema@gmail.com
Subject: Re: Hardware for PostgreSQL
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