Error: Bugs or critical unexpected behaviors, node cannot proceed with task, consistency compromised
Warning: Expected behavior (file not found), node cannot proceed with task but can recover
Notice: Start/quit, validator funds, own attestations, own blocks, finality checkpoints, (any) slashings
Info: Important networking issues
Debug: Common networking (new peers, kick peers, timeouts), consensus stages, block/attestation validation
Trace: Keep-alive, routine schedule
Note: it is important not to fill disk with logs, this prevent analyzing them visually.
Logs done at high frequency should be summarized even at trace level to avoid drowning other subsystem
For example they can use an uint8 counter with
proc myHighFreqProc() =
var counter {.threadvar.}: uint8
if counter == 255:
trace "Total of 255 myHighFreqProc call"
counter += 1
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