From: Evgeny Shishkin <itparanoia@gmail.com>
To: Niels Kristian Schjødt <nielskristian@autouncle.com>
Cc: Craig Ringer <craig@2ndQuadrant.com>
Cc: Jeff Janes <jeff.janes@gmail.com>
Cc: pgsql-performance@postgresql.org <pgsql-performance@postgresql.org>
Subject: Re: Do I have a hardware or a software problem?
Date: Tue, 11 Dec 2012 21:15:59 +0400
Message-ID: <67FBF3AF-5C6A-45D4-9206-7257C8C01C5E@gmail.com> (raw)
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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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To: pgsql-performance@postgresql.org
Cc: itparanoia@gmail.com, nielskristian@autouncle.com, craig@2ndQuadrant.com, jeff.janes@gmail.com
Subject: Re: Do I have a hardware or a software problem?
In-Reply-To: <67FBF3AF-5C6A-45D4-9206-7257C8C01C5E@gmail.com>
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