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.

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

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