Re: High end server and storage for a PostgreSQL OLTP system

On Mon, Jan 31, 2005 at 09:41:32PM +0100, Cosimo Streppone wrote:
> 2) The goal is to make the db handle 100 tps (something like
> 100 users). What kind of server and storage should I provide?
>
> The actual servers our application runs on normally have
> 2 Intel Xeon processors, 2-4 Gb RAM, RAID 0/1/5 SCSI
> disk storage with hard drives @ 10,000 rpm

You might look at Opteron's, which theoretically have a higher data
bandwidth. If you're doing anything data intensive, like a sort in
memory, this could make a difference.

> 4) Is it correct to suppose that multiple RAID 1 arrays
> can provide the fastest I/O ?
> I usually reserve one RAID1 array to db data directory,
> one RAID1 array to pg_xlog directory and one RAID1 array
> for os and application needs.

RAID10 will be faster than RAID1. The key factor to a high performance
database is a high performance I/O system. If you look in the archives
you'll find people running postgresql on 30 and 40 drive arrays.
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