Our devices get events logged like this:
Polling took longer than 0 minutes! This will cause gaps in graphs.
I find that this message comes from includes/polling/functions.inc.php where the polling time is compared to $config[‘rrd’][‘step’]. However, I cannot find anywhere that $config[‘rrd’][‘step’] is defined. The file includes/defaults.inc.php has it commented out.
To get rid of these errors, I’ve manually set this value to 300 in my config.php file, but this shouldn’t be relied upon if it is not actually set.