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Re: Huge Data sets, simple queries

From: Michael Stone <mstone+postgres(at)mathom(dot)us>
To: pgsql-performance(at)postgresql(dot)org
Subject: Re: Huge Data sets, simple queries
Date: 2006-01-29 15:43:24
Message-ID: 20060129154323.GA9976@mathom.us (view raw or flat)
Thread:
Lists: pgsql-performance
On Sun, Jan 29, 2006 at 12:25:23PM +0100, hubert depesz lubaczewski wrote:
>hmm .. do i understand correctly that you're suggesting that using
>raid 10 and/or hardware raid adapter might hurt disc subsystem
>performance? could you elaborate on the reasons, please?

I think it's been fairly well beaten to death that the low-end hardware 
raid adapters have lousy performance. It's not until you get into the 
range of battery-backed disk caches with 512M+ and multiple I/O channels 
that hardware raid becomes competitive with software raid.

Mike Stone

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