On 9/28/16 6:13 PM, Robert Haas wrote:
> Christoph/Debian:
>     log_line_prefix = '%t [%p-%l] %q%u@%d '
> Peter:
>     log_line_prefix = '%t [%p]: [%l] %qapp=%a '

I'm aware of two existing guidelines on log line formats: syslog and
pgbadger.  Syslog output looks like this:

Sep 28 00:58:56 hostname syslogd[46]: some text here

pgbadger by default asks for this:

log_line_prefix = '%t [%p]: [%l-1] user=%u,db=%d,app=%a,client=%h '

I don't know why it wants that "-1" there, and I'm actually not sure
what the point of %l is in practice.  Those are separate issues that are
having their own lively discussions at times.  I could drop the [%l]
from my proposal if that causes concerns.

On balance, I think my proposal is more in line with existing
wide-spread conventions.

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


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