Magnus Hagander <magnus@hagander.net> writes:
> I'd like to add another field to messages called "source" (not wedded
> to the name). Initially, this could just be "user" and "internal", but
> I can see a use-case in the future for it to differ between for
> example "archiver" and "bgwriter" (it's certainly not unheard of that
> one would want to look at all output from the archiver, but ignore all
> other output).
I think you'd have great difficulty making this work reliably ---
there are lots of messages that could be emitted in multiple contexts.
Just about all of bufmgr.c, for instance.
regards, tom lane