Re: [pgsql-patches] Phantom Command IDs, updated patch

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Alvaro Herrera <alvherre(at)commandprompt(dot)com>, Heikki Linnakangas <heikki(at)enterprisedb(dot)com>, pgsql-patches(at)postgresql(dot)org
Subject: Re: [pgsql-patches] Phantom Command IDs, updated patch
Date: 2007-02-08 16:22:18
Message-ID: 200702081622.l18GMIh09513@momjian.us
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Tom Lane wrote:
> Alvaro Herrera <alvherre(at)commandprompt(dot)com> writes:
> > Heikki Linnakangas wrote:
> >> Tom Lane wrote:
> >>> BTW, I don't care much for the terminology "phantom cid" ... there's
> >>> nothing particularly "phantom" about them, seeing they get onto disk.
> >>> Can anyone think of a better name? The best I can do offhand is
> >>> "merged cid" or "cid pair", which aren't inspiring.
> >>
> >> MultiCid, like the MultiXacts? Maybe not, they're quite different beasts...
>
> > Dual cid? Double cid?
>
> "Double cid" doesn't sound too bad. Another thought that just came to
> mind is "cid interval" or some variant of that.

I don't like "double ctid" because it is really just one ctid, but
represents two. I am thinking "packed ctid" is the right wording. It
doesn't have the same impact as "phantom", but it is probably better.

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://www.enterprisedb.com

+ If your life is a hard drive, Christ can be your backup. +

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