Horton

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

Robert Haas <robertmhaas@gmail.com>

View thread View on postgr.es
From: Robert Haas <robertmhaas@gmail.com>
To: Craig Ringer <craig@2ndquadrant.com>
Cc: Petr Jelinek <petr@2ndquadrant.com>, Simon Riggs <simon@2ndquadrant.com>, PostgreSQL Hackers <pgsql-hackers@postgresql.org>, Andres Freund <andres@anarazel.de>, Jim Nasby <Jim.Nasby@bluetreble.com>, Álvaro Herrera <alvaro.herrera@2ndquadrant.com>
Date: 2017-03-14T11:57:08Z
Lists: pgsql-hackers 
On Mon, Mar 13, 2017 at 10:22 PM, Craig Ringer <craig@2ndquadrant.com> wrote:
> I'll introduce a new LWLock, ClogTruncationLock, which will be held
> from when we advance the new clogOldestXid field through to when clog
> truncation completes.

+1.

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

Commits

  1. Add a txid_status function.

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