fix(site-call-audit): KPI snapshots as single conditional-aggregate queries (review 2026-10-21 06/PERF-3, 08/P3)

2026-10-22 09:23:53 -04:00
parent 811a561885
commit e7fb71c2de
3 changed files with 240 additions and 145 deletions
@@ -209,6 +209,13 @@ mirroring the Notification Outbox KPI shape:
 - Stuck count — `Pending`/`Retrying` older than a configurable threshold
  (default 10 minutes); display-only, no escalation.

+Each snapshot (global, per-site, per-node) is **one conditional-aggregation
+query** over the rows that contribute to at least one metric (non-terminal,
+Parked, or Delivered/Failed inside the interval), with the oldest-pending age a
+`MIN` over a `CASE` in the same scan — the same shape as the Notification
+Outbox repository. (It used to cost 7 / 6 / 6 sequential round trips, paid by
+the 10 s dashboard poll and the per-minute KPI sampler.)
+
 ## Retention

 Daily purge of terminal rows (`Delivered`, `Failed`, `Discarded`) after a