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From: Tom Lane <[email protected]>
To: Greg Smith <[email protected]>
Cc: [email protected]
Subject: Re: Volunteer to build a configuration tool
Date: Wed, 20 Jun 2007 01:43:50 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
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Greg Smith <[email protected]> writes:
> On Wed, 20 Jun 2007, Mike Benoit wrote:
>> I don't think something like this would be very difficult at all to
>> write

> Here I just smile and say that proves you've never tried to write one :) 

I'm with Greg on this.  It's not that easy to optimize in a
multi-parameter space even if all conditions are favorable, and they
never are.

I think what would be much more useful in the long run is some
serious study of the parameters themselves.  For instance,
random_page_cost is a self-admitted oversimplification of reality.
We know that good settings for it depend critically on how large
your DB is relative to your RAM; which means there are at least two
parameters there, but no one's done any serious thinking about how
to disentangle 'em.

			regards, tom lane

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