One thing we have not yet explored is using display tags or labels in presenting graph data within Grafana. This is critical as it is something we will do regularly, especially when charted data must be grouped by one or more column names.
This is also important when interacting with InfluxDB systems, as Grafana sends queries using its natively supported syntax. This means any query that is not quite understood by InfluxDB will also not display properly in Grafana. The output from Grafana is also not something we would recognize as users of PostgreSQL.
This recipe will explain how to set up one final Grafana panel that will track replication slot lag on two previously allocated replica nodes.