Metrics explanation

Looking into an issue where we ran out of backend node connections, I’ve set the maxconn values for the pool members, and would like to graph these values in Grafana. I have the metrics, but can’t find what certain values mean:

  • h1_open_connections (spiked to the limit we found)
  • need_conn_est (flatlined at the found limit)
  • scur

Or are there other values I should be looking at? I have session/sec counters, just not concurrent, queued and (HAproxy) rejected sessions.