share of reconstructions that don't need a transaction request (delving post)
share of equal getblocktxn transactions requests per cmpactblock across multiple nodes (useful to know before we start working on something that prefills cmpctblocks with transactions we didn't know about and had to request)
track number of mutated blocks (and why they are mutated)
function timings
time spent in SendMessages and ProcessMessages (delving post)
address relay
not accepted addr addresses
per peer address relay rate
per peer address message size
address timestamp offset
ping-pong
per peer ping-rate
ping value distribution (some clients only set 16 bit / 32 bit values for the 64 bit value)
Network metrics that might be interesting to track:
getblocktxn
transactions requests per cmpactblock across multiple nodes (useful to know before we start working on something that prefills cmpctblocks with transactions we didn't know about and had to request)SendMessages
andProcessMessages
(delving post)