How to query an alert to find no of restarts and crash in grafana dashboard

Hi team
I am new to Grafana and started creating a dashboard to know metrics like CPU Utilization ,memory ,load ,no of restarts and crash of AUT(ECG device),where graphite is a Data source and collectd for metrics
I need help in querying an alert to find the no of restarts ,crash and plugin required to be included in collectd and the best way to visualize them in dashboard