Collectd-Plugins-RsyslogStats
collectd plugin for reading queue metrics from rsyslog/imstats logfile.
In your collectd config:
<LoadPlugin "perl">
Globals true
</LoadPlugin>
<Plugin "perl">
BaseName "Collectd::Plugins"
LoadPlugin "RsyslogStats"
<Plugin "RsyslogStats">
path "/var/log/rsyslog-stats.log"
prefix "rsyslog"
metrics "enqueued,size"
</Plugin>
</Plugin>