Re: Peter Eisentraut 2016-09-29 
> > 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.

[%l-1] is originally from pgfouine, and I vaguely remember that it
used to be something like [%l-%c] where %c was some extra line
numbering removed in later (7.something?) PG versions. In any case,
the -1 isn't useful.

I'm happy to remove %l as well. Log lines won't be out of order
anyway, and one needs to look at %p anyway to correlate them. %l
doesn't help there.


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