[systemd-devel] rsyslog drops messages in debug mode

[Rainer Gerhards]

> -----Original Message-----
> From: Lennart Poettering [mailto:lennart at poettering.net]
> Sent: Wednesday, April 20, 2011 2:33 AM
> To: Michael Biebl
> Cc: Mike Kazantsev; systemd-devel at lists.freedesktop.org; Rainer
> Gerhards
> Subject: Re: [systemd-devel] rsyslog drops messages in debug mode
> 
> On Fri, 18.03.11 07:42, Michael Biebl (mbiebl at gmail.com) wrote:
> 
> >
> > 2011/3/18 Mike Kazantsev <mk.fraggod at gmail.com>:
> > > On Fri, 18 Mar 2011 07:03:01 +0100
> > > Michael Biebl <mbiebl at gmail.com> wrote:
> > >
> > >> Hi,
> > >>
> > >> when booting with systemd.log_level=debug, I get
> > >>
> > >> Mar 18 06:39:26 pluto rsyslogd-2177: imuxsock begins to drop
> messages
> > >> from pid 1 due to rate-limiting
> > >> ...
> > >> Mar 18 06:39:31 pluto rsyslogd-2177: imuxsock lost 127 messages
> from
> > >> pid 1 due to rate-limiting
> > >>
> > >> Note: I didn't explicitly use systemd.log_target=kmsg
> > >>
> > >
> > > I believe it's an rsyslog (imuxsock module) newer feature to limit
> flow
> > > from extra-verbose apps by default, which you can tune or
> completely
> > > bypass, as described in the docs:
> > >
> >
> > I know that (and I forgot to add that I use rsyslog 5.7.8).
> > My point rather is, that for a default rsyslog + systemd installation
> > imho this should not happen.
> > I'm wondering if the default values in rsyslog are too aggressive in
> > that regard?
> 
> That's why I suggest using systemd.log_level=debug in combination with
> systemd.log_target=kmsg.
> 
> But yeah, maybe the default should be raised a little in rsyslog. Or
> maybe rsyslog should allow more debug info than other info by defualt?
> Dunno. Maybe file a bug against rsyslog?

I am not opposed to raising default limits (remember that you can always tune
them via the config). But what's the right level? After all they are there as
a guard against too noisy sources. If we raise the level too high, that won't
work. I think there really is a conflict in these cases...

Rainer