Useful Monitoring Queries through Prometheus?

Using the metrics which are being exposed to Prometheus: observability-with-prometheus

Can someone suggest me some useful PromQL queries which can be used to monitor and make sure that Metabase is performing well without any issues?

This is an example PromQL query which is supposed to give the CPU usage:
(sum by (instance) (rate(process_cpu_seconds_total{job="$job"}[1m]))*100)

Also I want to know if there is any way to know about too long running queries in metabase through the metrics being exposed to prometheus?