there are not so many explanations about… but you can try to search on goole for each metric
for example for the first one (density) I found on another topic:
chain density is a reflection on the health of the network. With block coefficient is 0.05 and slot duration of 20s, and ideal chain density would be ~5%. A chain density with a lower % implies the degree to which nodes are missing or failing to produce assigned blocks.
but for the rest of metrics I couldn’t find anything… anyway
you should care on grafana about the:
- KES expiration date for Producer
- Peers connected for Producer and Relay
- Time syncronization
- Health of the nodes (CPU, RAM, DISK, SWAP)
- Tx processed
- Uptime
These are most relevant for me when I check grafana
