Re: Improving connection scalability: GetSnapshotData()

From: Thomas Munro <thomas(dot)munro(at)gmail(dot)com>
To: Andres Freund <andres(at)anarazel(dot)de>
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: 2020-07-29 07:20:04
Message-ID: CA+hUKGK_4Sa0zHcfc+7HguHhQZ0dQn4P6yzMA1MsjHawmOq0ug@mail.gmail.com
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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.

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