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Re: random_page_cost = 2.0 on Heroku Postgres

From: Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>
To: Peter van Hardenberg <pvh(at)pvh(dot)ca>
Cc: Josh Berkus <josh(at)agliodbs(dot)com>, pgsql-performance(at)postgresql(dot)org
Subject: Re: random_page_cost = 2.0 on Heroku Postgres
Date: 2012-02-09 02:28:12
Message-ID: CAOR=d=3CqkNHvznRggv5HvY8C=Pex1EO9XQ2giNKX6VnL8LTyw@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-performance
On Wed, Feb 8, 2012 at 6:45 PM, Peter van Hardenberg <pvh(at)pvh(dot)ca> wrote:
> Having read the thread, I don't really see how I could study what a
> more principled value would be.

Agreed.  Just pointing out more research needs to be done.

> That said, I have access to a very large fleet in which to can collect
> data so I'm all ears for suggestions about how to measure and would
> gladly share the results with the list.

I wonder if some kind of script that grabbed random queries and ran
them with explain analyze and various random_page_cost to see when
they switched and which plans are faster would work?

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Next:From: Peter van HardenbergDate: 2012-02-09 02:47:50
Subject: Re: random_page_cost = 2.0 on Heroku Postgres
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