Hello everyone,
I'm setting up a Grafana dashboard for our FusionAuth instances and I've run into some confusion regarding the interpretation of several key metrics, particularly those exported as Dropwizard Histograms/Prometheus Summaries.

I would be grateful if anyone who has successfully instrumented and analyzed these metrics could share their insights, especially concerning the units and the meaning of the quantile alignment.

One of the confusing metrics are Database_primary_pool_*
one example scrape showed
Database_primary_pool_MaxConnections: 20.0
but
Database_primary_pool_Usage{quantile="0.999"}: 45.0
and at some point I saw a 1300 peak.
Can I assume that in this case the quantile metric is the "time", specifically in milliseconds, consumed in the primary pool connection?

Is there any documentation on how to interpret all metrics exposed by /api/prometheus/metrics/?
I found this page https://fusionauth.io/docs/operate/monitor/prometheus but there's no reference or documentation for the metrics

Thank you in advance for any hint
_
Fabio