The cache_requests_total metric used match_all=true, counting health
check requests (no cache_status) alongside real traffic. Dashboard
queries used rate()[5m] which produced blank or 100% on low-traffic
static sites. Switch to increase()[$__range] for meaningful aggregation
and add null/NaN value mapping to show "No traffic" instead of red.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
