The current hickups seem to be mysql and apache mpm related... more to mysql to my understanding...
root@wechall:~# lsof | grep mysql | wc -l
We (I) will probably still fiddle here and there from time and and my excuse in advance for any inconvinience.
Backups have been made properly.
Next plan is carefully:
(EDIT: If hiccups dont go away after a recent php / worker update)
(EDIT: Still hiccups)
(EDIT: Dovecot was choking on the ssl config).. better?
(EDIT: Currently restarting apache+mysql every 4h)
a) trying to switch some InnoDB Settings
b) moving to MariaDB
c) move to myisam
(no particular order in preferred solution)
Maybe someone has some suggestions