Re: Improving connection scalability: GetSnapshotData()

From: Andres Freund <andres(at)anarazel(dot)de>
To: Thomas Munro <thomas(dot)munro(at)gmail(dot)com>
Cc: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Daniel Gustafsson <daniel(at)yesql(dot)se>, Robert Haas <robertmhaas(at)gmail(dot)com>, "Jonathan S(dot) Katz" <jkatz(at)postgresql(dot)org>, Alexander Korotkov <a(dot)korotkov(at)postgrespro(dot)ru>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>, Peter Geoghegan <pg(at)bowt(dot)ie>, Bruce Momjian <bruce(at)momjian(dot)us>, David Rowley <dgrowleyml(at)gmail(dot)com>
Subject: Re: Improving connection scalability: GetSnapshotData()
Date: 2020-08-12 00:19:38
Message-ID: 20200812001938.ixenvxdpg4ielbue@alap3.anarazel.de
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Hi,

On 2020-07-29 19:20:04 +1200, Thomas Munro wrote:
> On Wed, Jul 29, 2020 at 6:15 PM Thomas Munro <thomas(dot)munro(at)gmail(dot)com> wrote:
> > +static inline FullTransactionId
> > +FullXidViaRelative(FullTransactionId rel, TransactionId xid)
> >
> > I'm struggling to find a better word for this than "relative".
>
> The best I've got is "anchor" xid. It is an xid that is known to
> limit nextFullXid's range while the receiving function runs.

Thinking about it, I think that relative is a good descriptor. It's just
that 'via' is weird. How about: FullXidRelativeTo?

Greetings,

Andres Freund

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