I was looking for some statistics on the network overhead for individual nodes on the Ethereum network and couldn’t find any info outside of the latency info on ethstats.net. By that, I mean any information on how many individual messages and or how many megabytes a node on the network receives/sends/relays on average per day. Are there any existing metrics for this, and are there any predictions/estimations for such metrics under PoS/Sharding?
You could try using metrics with Geth? This would be “subjective” to the monitored node though.
I am unsure how you capture the data for further use sorry.