#122: the Notification Outbox KPI snapshots ORed every status in one
aggregation, which scanned the clustered index once the table held ~1 M
Parked rows (0.7-2.6 s; Health dashboard up to 5 s). Each snapshot now runs
three status-equality legs that seek their own index (~0.12 s); a cold Health
load on the rig is 0.12-0.52 s.
#123: site_events event_type/severity indexes are now composites with
timestamp, so a filtered page is read in order and stops at the limit
(severity=Error over 1 GB: 2,287 -> 15 ms cold, 115 -> 1.6 ms warm). Costs
454 -> 530 B/row, ~14 % fewer rows under the same cap. The schema apply drops
the old indexes in place; the cap size model samples timestamp three times
and re-scores inside its band with unchanged constants.
#124: the set-based AuditLog insert's NOT EXISTS probe scanned the EventId
index and concurrent writers deadlocked on S/IX page locks. WITH (FORCESEEK):
4 writers 775 rows/s + 76 deadlocks in 30 s -> 5,214 rows/s + 0. New
concurrent-writer regression test fails 4/4 without the hint.
Comment/XML-doc changes only:
- add summaries to ~10k test methods, fixtures, fakes and helpers
(+ <param> on theories, <returns> on async Task methods,
<inheritdoc/> on interface implementations the checker can resolve)
- strip ~2.6k project-tracking references (WP*, P*-*, row-NN, Task N,
#NN, Component-0NN) from comments, keeping the explanatory text;
reword false positives in comments only
- real docs on fakes implementing BCL/library interfaces
(IDisposable, ILogger, IOptionsMonitor, IAsyncLifetime)
- reword the last 5 src/ false positives (CWE-1236, failures-1,
year-0001, M365)
Only non-comment edits: four one-line nested classes split across lines
so members can carry docs. Build 0 errors / 0 warnings.
Joseph Doherty