Horton

Re: [PATCH] Transaction traceability - txid_status(bigint)

Craig Ringer <craig@2ndquadrant.com>

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From: Craig Ringer <craig@2ndquadrant.com>
To: Simon Riggs <simon@2ndquadrant.com>
Cc: PostgreSQL Hackers <pgsql-hackers@postgresql.org>, Andres Freund <andres@anarazel.de>, Jim Nasby <Jim.Nasby@bluetreble.com>, Robert Haas <robertmhaas@gmail.com>
Date: 2016-09-02T12:38:39Z
Lists: pgsql-hackers 
On 2 Sep. 2016 8:30 pm, "Simon Riggs" <simon@2ndquadrant.com> wrote:
>
> On 2 September 2016 at 13:16, Craig Ringer <craig@2ndquadrant.com> wrote:
>
> > So I've moved it to xlog.c...
>
> I'm pretty sure it shouldn't live in xlog.c, but there may be some
> good reason I can't see yet.

Ugh. Yes. transam.c would be rather saner.

Only for the helper to determine if an xid is recent though; txid_ status
stays in adt/xact.c where it belongs along with txid_current() etc.

> --
> Simon Riggs                http://www.2ndQuadrant.com/
> PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

Commits

  1. Add a txid_status function.

  2. Track the oldest XID that can be safely looked up in CLOG.