From: Evgeny Shishkin <itparanoia@gmail.com>
To: Niels Kristian Schjødt <nielskristian@autouncle.com>
Cc: pgsql-performance@postgresql.org <pgsql-performance@postgresql.org>
Cc: Jeff Janes <jeff.janes@gmail.com>
Cc: Craig Ringer <craig@2ndquadrant.com>
Subject: Re: Do I have a hardware or a software problem?
Date: Tue, 11 Dec 2012 23:11:14 +0400
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On Dec 11, 2012, at 10:54 PM, Niels Kristian Schjødt <nielskristian@autouncle.com> wrote:
> And what is your experience so far?
>
Increased tps by a factor of 10, database no longer a limiting factor of application.
And it is cheaper than brand rotating drives.
> Den 11/12/2012 18.16 skrev "Evgeny Shishkin" <itparanoia@gmail.com>:
>
> On Dec 11, 2012, at 5:35 PM, Niels Kristian Schjødt <nielskristian@autouncle.com> wrote:
>
> >
> > Den 11/12/2012 kl. 14.29 skrev Craig Ringer <craig@2ndQuadrant.com>:
> >
> >> On 12/11/2012 06:04 PM, Niels Kristian Schjødt wrote:
> >>>
> >>> Maybe I should mention, that I never see more than max 5Gb out of my total 32Gb being in use on the server… 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?
> >>
> >> Not RAID 5!
> >>
> >> Use a RAID10 of four or six SSDs.
> >>
> >> --
> >> Craig Ringer http://www.2ndQuadrant.com/
> >> PostgreSQL Development, 24x7 Support, Training & Services
> >>
> > 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
> > Are they suitable do you think?
> >
>
> I am not Craig, but i use them in production in raid10 array now.
>
> >
> >
> > --
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>
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To: pgsql-performance@postgresql.org
Cc: itparanoia@gmail.com, nielskristian@autouncle.com, jeff.janes@gmail.com, craig@2ndquadrant.com
Subject: Re: Do I have a hardware or a software problem?
In-Reply-To: <E2A43856-FE0A-44BC-9764-C3CA533D94D9@gmail.com>
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