Ilia Denisov
46d569720c
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The "Database size" stat had no thresholds, so Grafana applied its stat default (green base, red at >=80). The query is pg_database_size_bytes, so a healthy ~9 MiB database (9.4M >> 80) rendered permanently RED on the Scrabble - Resources dashboard (test + prod), reading as a false alert; the neighbouring percentunit cache-hit stat stayed green only because its 0..1 values fall under 80. Add absolute byte thresholds sized to the 40 GiB prod disk (4.6 GiB used, observability bounded -- Tempo <=1 GiB, Prometheus 7d -- so the DB is the only unbounded grower): green up to 8 GiB, yellow at 8 GiB (~20% of disk), red at 16 GiB (~40%), an early warning with ample runway before the disk tightens, not a panic line. Cosmetic panel coloring only; there are no Grafana alert rules provisioned.