[syslog-ng] TMI: spam-like messages every 30 sec?

Hi folks, Every 30 seconds I get one of these messages in my syslog file, on behalf of syslog-ng, for each and every file destination (I have about 50): Reaping unused destination files; template='/var/log/blah/$YEAR/ $MONTH/$HOST/maillog' Now this happens even for very heavily used log destinations, including the firewall, which is getting a few hundred hits a minute. Basically, this is filling up my /var partition every couple days and I'd like to stop it. I haven't found the config to use to turn this log message OFF, and I would like to know why even the busiest logs are getting tagged as 'unused'. Can someone give me some clues here? Much appreciation, KC