| From: | Matthew Wakeling <matthew(at)flymine(dot)org> |
|---|---|
| To: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Hardware suggestions for high performance 8.3 |
| Date: | 2008-06-25 11:15:56 |
| Message-ID: | Pine.LNX.4.64.0806251210520.5056@aragorn.flymine.org |
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| Lists: | pgsql-performance |
On Wed, 25 Jun 2008, Henrik wrote:
> What are your suggestions. What we are currently looking at is.
>
> Dual Quad Core Intel
> 8 - 12 GB RAM
More RAM would be helpful. It's not that expensive, compared to the rest
of your system.
> 10 disks total.
>
> 4 x 146 GB SAS disk in RAID 1+0 for database
> 6 x 750 GB SATA disks in RAID 1+0 or RAID 5 for OS and transactions logs.
>
> Good RAID controller with lots of memory and BBU.
If you have a good RAID controller with BBU cache, then there's no point
splitting the discs into two sets. You're only creating an opportunity to
under-utilise the system. I'd get ten identical discs and put them in a
single array, probably RAID 10.
Also, do you really need 6*750GB for OS and transaction logs? How big can
they be?
However, the most important factor is that you get a good BBU cache.
Matthew
--
I don't want the truth. I want something I can tell parliament!
-- Rt. Hon. Jim Hacker MP
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