Re: SSD + RAID

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От Merlin Moncure
Тема Re: SSD + RAID
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Msg-id b42b73150911130759t3d369de5j330929a4b9666d6@mail.gmail.com
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Ответ на Re: SSD + RAID  (Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>)
Ответы Re: SSD + RAID  (Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>)
Список pgsql-performance
2009/11/13 Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>:
> Laszlo Nagy wrote:
>>    * I need at least 32GB disk space. So DRAM based SSD is not a real
>>      option. I would have to buy 8x4GB memory, costs a fortune. And
>>      then it would still not have redundancy.
>
> At 32GB database size, I'd seriously consider just buying a server with
> a regular hard drive or a small RAID array for redundancy, and stuffing
> 16 or 32 GB of RAM into it to ensure everything is cached. That's tried
> and tested technology.

lots of ram doesn't help you if:
*) your database gets written to a lot and you have high performance
requirements
*) your data is important

(if either of the above is not true or even partially true, than your
advice is spot on)

merlin

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