Re: Size of Path nodes

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Peter Geoghegan <pg(at)heroku(dot)com>
Cc: Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Size of Path nodes
Date: 2015-12-05 01:41:26
Message-ID: CA+TgmoY-DyBRoi6FYZzQZzg=g77byxuRigYBOtQcJVnfDed5cQ@mail.gmail.com
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-hackers

On Fri, Dec 4, 2015 at 6:14 PM, Peter Geoghegan <pg(at)heroku(dot)com> wrote:
> As frustrated as I've sometimes been with those discussions, I do
> recognize that there has to be a middle ground, and that the emphasis
> on distributed costs has as much to do with fairness for every
> contributor as anything else. I would have appreciated some attempt to
> have quantified the overhead here, but would not have insisted on
> Robert being as thorough as he conceivably could have been.

Honestly, I really never thought of the issue of whether this would
push some structure over a power-of-two size. It's not like either
Path or IndexPath have comments saying "for the love of heaven, don't
make this bigger". This is in contrast to, say, PGXACT, where there
is a such a comment, because I knew it was an issue and I added a
comment explaining that issue. Now maybe I should have foreseen the
objection anyway, but, you know, it's hard to foresee everything
somebody might object to.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

In response to

Browse pgsql-hackers by date

  From Date Subject
Next Message Noah Misch 2015-12-05 02:55:29 Re: Rework the way multixact truncations work
Previous Message Jim Nasby 2015-12-05 00:38:25 Re: Size of Path nodes