Check the command that starts
snmpd (possibly somewhere
/etc/rc.d/ - in Ubuntu it's
/etc/defaults/snmpd) for the logging options:
SNMPDOPTS='-Lsd -Lf /dev/null -u snmp -I -smux -p /var/run/snmpd.pid -g root 0.0.0.0'
Or find it in the
ps aux | grep snmpd output.
The man page gives the logging options:
Log messages via syslog, using the specified facility ('d' for LOG_DAEMON, 'u' for LOG_USER, or '0'-'7' for LOG_LOCAL0 through LOG_LOCAL7).
There are also "upper case" versions of each of these options, which allow the corresponding logging mechanism to be restricted to certain priorities of message.
For -LF and -LS the priority specification comes before the file or facility token. The priorities recognised are:
0 or ! for LOG_EMERG,
1 or a for LOG_ALERT,
2 or c for LOG_CRIT,
3 or e for LOG_ERR,
4 or w for LOG_WARNING,
5 or n for LOG_NOTICE,
6 or i for LOG_INFO, and
7 or d for LOG_DEBUG.
The default is fairly verbose (only 2 levels below debug):
Normal output is (or will be!) logged at a priority level of LOG_NOTICE
If you're logging to syslog via LOG_DAEMON (-Lsd), you could reduce it to e.g. LOG_WARNING with
-LS4d, or LOG_ERR with
(Edited to put the options in the right order.)