Message-ID: <42CDED86.3000108@commandprompt.com>
Date: Thu, 07 Jul 2005 20:05:42 -0700
From: "Joshua D. Drake" <jd@commandprompt.com>
Organization: Command Prompt, Inc.
User-Agent: Mozilla Thunderbird 1.0.2 (X11/20050404)
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To: Stuart Bishop <stuart@stuartbishop.net>
Cc: pgsql-performance@postgresql.org
Subject: Re: Mount database on RAM disk?
References: <42CDD7B8.6050109@stuartbishop.net>
In-Reply-To: <42CDD7B8.6050109@stuartbishop.net>
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Stuart Bishop wrote:
> I'm putting together a road map on how our systems can scale as our load
> increases. As part of this, I need to look into setting up some fast read
> only mirrors of our database. We should have more than enough RAM to fit
> everything into memory. I would like to find out if I could expect better
> performance by mounting the database from a RAM disk, or if I would be
> better off keeping that RAM free and increasing the effective_cache_size
> appropriately.

In theory yes if you can fit the entire database onto a ram disk then 
you would see a performance benefit.

Sincerely,

Joshua D. Drake


> 
> I'd also be interested in knowing if this is dependant on whether I am
> running 7.4, 8.0 or 8.1.
> 
> 


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