| From: | Merlin Moncure <mmoncure(at)gmail(dot)com> |
|---|---|
| To: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
| Cc: | Laszlo Nagy <gandalf(at)shopzeus(dot)com>, pgsql-performance <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: SSD + RAID |
| Date: | 2009-11-13 15:59:03 |
| Message-ID: | b42b73150911130759t3d369de5j330929a4b9666d6@mail.gmail.com |
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| Lists: | pgsql-performance |
2009/11/13 Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)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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