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Subject: Re: Do I have a hardware or a software problem?
From: Evgeny Shishkin <itparanoia@gmail.com>
In-Reply-To: <4507A68A-3CD5-4283-AFA5-1C0593427E14@autouncle.com>
Date: Tue, 11 Dec 2012 21:15:59 +0400
Cc: Craig Ringer <craig@2ndQuadrant.com>, Jeff Janes <jeff.janes@gmail.com>,
	"pgsql-performance@postgresql.org" <pgsql-performance@postgresql.org>
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To: =?windows-1252?Q?Niels_Kristian_Schj=F8dt?= <nielskristian@autouncle.com>
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On Dec 11, 2012, at 5:35 PM, Niels Kristian Schj=F8dt <nielskristian@autoun=
cle.com> wrote:

>=20
> Den 11/12/2012 kl. 14.29 skrev Craig Ringer <craig@2ndQuadrant.com>:
>=20
>> On 12/11/2012 06:04 PM, Niels Kristian Schj=F8dt wrote:
>>>=20
>>> Maybe I should mention, that I never see more than max 5Gb out of my to=
tal 32Gb being in use on the server=85 Can I somehow utilize more of it?
>> For an update-mostly workload it probably won't do you tons of good so
>> long as all your indexes fit in RAM. You're clearly severely
>> bottlenecked on disk I/O not RAM.
>>> The SSD's I use a are 240Gb each which will grow too small within a
>>> few months - so - how does moving the whole data dir onto four of
>>> those in a RAID5 array sound?=20
>>=20
>> Not RAID 5!
>>=20
>> Use a RAID10 of four or six SSDs.
>>=20
>> --=20
>> Craig Ringer                   http://www.2ndQuadrant.com/
>> PostgreSQL Development, 24x7 Support, Training & Services
>>=20
> Hehe got it - did you have a look at the SSD's I am considering building =
it of? http://ark.intel.com/products/66250/Intel-SSD-520-Series-240GB-2_5in=
-SATA-6Gbs-25nm-MLC=20
> Are they suitable do you think?
>=20

I am not Craig, but i use them in production in raid10 array now.

>=20
>=20
> --=20
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