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Re: per-tablespace random_page_cost/seq_page_cost

From: Greg Stark <gsstark(at)mit(dot)edu>
To: Josh Berkus <josh(at)agliodbs(dot)com>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: per-tablespace random_page_cost/seq_page_cost
Date: 2009-10-26 23:35:24
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
On Mon, Oct 26, 2009 at 3:05 PM, Josh Berkus <josh(at)agliodbs(dot)com> wrote:
> I'm thinking an array, in case we want to make other tablespace cost
> parameters in the future.*  Or, better, whatever structure we're
> currently using for ROLEs.
> (* for example, if someone does manage a filesystem with a separate
> cache space per mount, then we'd want effective_cache_size to be
> tablespace-based as well)

Still far from convinced on that one. But effective_io_concurrency
should be included even in the first pass.


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