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.