Just noting a following observation. I’ve got a following warning in the logs after restarting a node:
2021-03-27T13:37:10.784Z INFO failed to sufficiently increase receive buffer size (was: 208 kiB, wanted: 2048 kiB, got: 416 kiB). See https://github.com/lucas-clemente/quic-go/wiki/UDP-Receive-Buffer-Size for details.
The linked webpage suggests:
It is recommended to increase the maximum buffer size by running:
sysctl -w net.core.rmem_max=2500000
This command would increase the maximum receive buffer size to roughly 2.5 MB.
I suspect that the impact of not changing this setting is minimal, but SNOs might want to take attention.