Comment 2 for bug 1689806

Verified on 9.2 + mu2 updates.

The package 'aodh-expirer' is installed for cluster with enabled Ceilometer:
root@node-3:~# dpkg -l | grep aodh-expirer
ii aodh-expirer 2.0.5-4~u14.04+mos3 all OpenStack Telemetry (Ceilometer) Alarming - expirer

The service 'aodh-expirer' is disabled:
root@node-3:~# service --status-all
...
[ - ] aodh-expirer
...

Cron is used instead - aodh-expirer is run every hour within 300 seconds range. At start of the hour:
root@node-3:~# top | grep aodh
...
21385 aodh 20 0 113920 48676 8416 R 31.5 1.6 0:00.95 aodh-expirer
..