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Re: pgsql-server/ oc/src/sgml/runtime.sgml rc/back ...

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Neil Conway <neilc(at)samurai(dot)com>
Cc: pgsql-committers(at)postgresql(dot)org
Subject: Re: pgsql-server/ oc/src/sgml/runtime.sgml rc/back ...
Date: 2004-01-22 02:29:17
Message-ID: 8911.1074738557@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-committers
Neil Conway <neilc(at)samurai(dot)com> writes:
> tgl(at)svr1(dot)postgresql(dot)org (Tom Lane) writes:
>> Repair error apparently introduced in the initial coding of GUC: the
>> default value for geqo_effort is supposed to be 40, not 1.  The actual
>> 'genetic' component of the GEQO algorithm has been practically disabled
>> since 7.1 because of this mistake.

> Is this worth considering for a backport to the 7.4 branch?

Considering it's been broken for several releases and no one noticed,
I'm not sure it's critical.  This is just something I noticed while
looking at Mike's recent complaint that GEQO is too slow.  This change
actually makes it slower :-( but I'm hoping to find that we can buy
that back with other improvements.

			regards, tom lane

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