I did a full new reinstall, with openhabian.conf
zraminstall=disable
Install Mosquitto OK
Install Influxdb+ Grafana, ended with Error 20 - Grafana not starting ( Loading Web interface via curl
failed)
did systemctl start grafana-server.service
… Grafana starts without problem
did a reboot, Mosquitto and Grafana still working.
So I think, the issue is with the zram
feature