When there's a package upgrade pending, of any kind, icinga gets quite annoying, mailing:
***** Icinga ***** Notification Type: PROBLEM Service: apt Host: pergamon.softwareheritage.org Address: 127.0.0.1 State: WARNING Date/Time: 2016-01-23 18:58:10 +0100 Additional Info: APT WARNING: 46 packages available for upgrade (0 critical updates). Comment: []
every 30 minutes.
Such a frequency is justified for other critical issues, but it's not for pending apt upgrades.
We should reduce it to something saner, like 24h.