The shared scaling peak (activity_peak) was fully-lighting ~60% of the
header pulse's bars on a healthy 1–18 packets/min history. Cause: the
recency damper decayed each bucket's *count* by 0.5^(age/half-life)
before taking the 90th percentile, then that percentile scaled the
*undecayed* bars drawn against it — a unit mismatch. With a 30-min
half-life over a 6h pool, most traffic mass sits older than one
half-life, so the weighted percentile collapsed (1.14 here) and the
floor (3) became the ceiling; every minute with ≥3 packets, anywhere in
the drawn history, then saturated.
Drop recency; keep the two dampers that actually deliver the steady,
shared ceiling: an outlier-robust high percentile over a pool deeper
than is drawn (steady — the percentile barely stirs as one bucket
scrolls off), plus a floor (a lone packet stays a green nub). On the
live DB this restores peak 8, ~4–13% of bars full, heights spread 1–4.
activity_peak loses its bucket_seconds/half_life_min params; menu.py and
channels.py drop the now-unused bucket-seconds plumbing. The tall
dashboard chart was already on an honest max and is untouched.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Jean-Pierre MartineauandClaude Opus 4.8
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