watchdog's actual interval between checks is 50% longer than the "interval" setting in /etc/watchdog.conf. In my watchdog.conf I have "interval = 10" and "logtick = 60". This should mean that watchdog checks every 10 seconds and logs every 60*10 = 600 seconds = 10 minutes. However, this is what I get in my logs: Jun 18 13:23:29 watchdog[8321]: still alive after 600 seconds = 60 interval(s) Jun 18 13:38:32 watchdog[8321]: still alive after 1200 seconds = 120 interval(s) Notice that 15 minutes are passing between log entries. If I set "interval" to 15 seconds and keep logtick at 60, it logs every 22.5 minutes instead of 15 minutes. I do not know if this problem exists in previous versions -- this latest version fixed verbose mode (-v) for me, so I am only now able to watch my logs for how often watchdog cycles.
Please report this issue upstream.