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Re: [DOCS] [HACKERS] Please Help: PostgreSQL Query Optimizer

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Josh Berkus <josh(at)agliodbs(dot)com>
Cc: pgsql-hackers(at)postgresql(dot)org, "Anjan Kumar(dot) A(dot)" <anjankumar(at)cse(dot)iitb(dot)ac(dot)in>, pgsql-chat(at)postgresql(dot)org, pgsql-benchmarks(at)postgresql(dot)org, pgsql-docs(at)postgresql(dot)org
Subject: Re: [DOCS] [HACKERS] Please Help: PostgreSQL Query Optimizer
Date: 2005-12-11 20:41:36
Message-ID: 18706.1134333696@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-benchmarkspgsql-chatpgsql-docspgsql-hackers
Josh Berkus <josh(at)agliodbs(dot)com> writes:
> I don't see why you're increasing the various cpu_* costs.

You missed the point Josh --- these numbers are relative to the cost of
a page fetch, so if page fetch is measured in microseconds instead of
milliseconds, then you *do* want to bump the CPU costs up.

			regards, tom lane

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