If you made some changes in grafana.ini file and restart of grafana-server service failed check /var/log/syslog file. If you see error message like this:

  • grafana-server[18414]: t=2016-12-05T15:33:28+0000 lvl=crit msg=”Failed to parse /etc/grafana/grafana.ini, error creating new key: empty key name%!(EXTRA []interface {}=[])”

it most likely means some typo in grafana.ini file – like “:” instead of “;” at the beginning of the like

Where ever you see in Grafana column with name “Size” check its behavior. Usually it limits number or returned results. Especially in graph default value is usually 10. So make sure to set it to 0 or “no limit” or similar value (check documentation).