Horton

Re: Temporary tables prevent autovacuum, leading to XID wraparound

Alvaro Herrera <alvherre@2ndquadrant.com>

View thread View on postgr.es
From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Michael Paquier <michael@paquier.xyz>
Cc: Andres Freund <andres@anarazel.de>, pgsql-hackers@lists.postgresql.org, "Tsunakawa, Takayuki" <tsunakawa.takay@jp.fujitsu.com>, Kyotaro HORIGUCHI <horiguchi.kyotaro@lab.ntt.co.jp>, "tgl@sss.pgh.pa.us" <tgl@sss.pgh.pa.us>, "robertmhaas@gmail.com" <robertmhaas@gmail.com>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Date: 2018-08-20T13:54:28Z
Lists: pgsql-hackers 
On 2018-Aug-20, Michael Paquier wrote:

> On Tue, Aug 14, 2018 at 06:53:32PM +0200, Michael Paquier wrote:
> > I was thinking about adding "Even if it is not atomic" or such at the
> > beginning of the paragraph, but at the end your phrasing sounds better
> > to me.  So I have hacked up the attached, which also reworks the comment
> > in InitTempTableNamespace in the same spirit.  Thoughts?
> 
> It has been close to one week since I sent this patch.  Anything?  I
> don't like to keep folks unhappy about anything I committed.

Seems reasonable.

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

Commits

  1. Clarify comment about assignment and reset of temp namespace ID in MyProc

  2. Make autovacuum more aggressive to remove orphaned temp tables

  3. Don't count background workers against a user's connection limit.