Re: Non-empty default log_line_prefix

From: Devrim Gündüz <devrim(at)gunduz(dot)org>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Jeff Janes <jeff(dot)janes(at)gmail(dot)com>
Cc: Christoph Berg <myon(at)debian(dot)org>, Robert Haas <robertmhaas(at)gmail(dot)com>, Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>, Andrew Dunstan <andrew(at)dunslane(dot)net>
Subject: Re: Non-empty default log_line_prefix
Date: 2016-10-12 19:05:21
Message-ID: 1476299121.2670.129.camel@gunduz.org
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Hi,

On Wed, 2016-10-12 at 13:11 -0400, Tom Lane wrote:
> > What is the cost of using %m, other than 4 (rather compressible) bytes per
> > log entry?
>
> More log I/O, which is not free ...

FWIW, we've been setting log_line_prefix to '< %m > ' for quite a long time in
PGDG RPMs, and did not get any complaints. I'd vote for %m for default.

Regards,
--
Devrim GÜNDÜZ
EnterpriseDB: http://www.enterprisedb.com
PostgreSQL Danışmanı/Consultant, Red Hat Certified Engineer
Twitter: @DevrimGunduz , @DevrimGunduzTR

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