I'm sorry for yesterdays service outage from 2018-10-02 8:55 pm [GMT+2] until 2018-10-03 9:34 am [GMT+2].
The server's RAM resources were fully utilized and most processes could not allocate any more memory. This lead to a crash of several services, including XMPP.
Unfortunately I could not handle the situation during night.
Service has been restored this morning.