Full-scale run executed on this machine: 10 sites x 500 instances x 75 tags =
375,000 live tag subscriptions, 37,518 updates/s achieved vs 37,500 nominal,
45,021,375 updates over a 20-minute steady-state window (M4 Pro, 14 cores, 48 GB,
with the 8-node docker rig still running so the figures are pessimistic).
11 clean passes, 1 pass with a caveat, 0 failures:
tag latency P50 0.88ms P99 4.57ms max 37.41ms (1.1M samples, end-to-end)
stream 900,675 delivered, 0 dropped at 100 live subscribers
health collect+ingest P99 0.31ms, 10/10 sites tracked
debug view P99 2.19ms, 264 completed, 0 timeouts
deploy 500 instances to a site in 2.6s
cpu 41% of ONE core = 2.9% of the box
memory working-set slope +8.83 MB/min
Three findings, reported rather than tuned away:
F1 (Low) 20 min with ZERO gen-2 collections cannot fully settle the leak
question; the heap demonstrably sawtooths but an uncompacted gen-2 makes a
positive slope ambiguous. The 1-hour run would settle it. Not tuned.
F2 (informational, by design) a deferred S&F backlog sits for one full
DefaultRetryInterval (28.9s measured) before anything drains --
EnqueueAsync(attemptImmediateDelivery:false) stamps LastAttemptAt. Easy to
misread as slow drainage, so drain is reported as two numbers: retry wait,
then 3,533 msg/s of actual capacity.
F3 (positive) slow-subscriber isolation is TOTAL: 4 healthy subscribers at
100.00% with zero drops while a peer lost 197,028/200,000 events entirely
within its own bounded channel. Mechanism recorded link by link.
Also records what the run does NOT prove (not clustered, not real-network, not
real OPC UA, not 1 hour) and the four WP-4 sub-criteria this harness does not
cover, so the evidence is not over-read.
Register rows 25 and 50 -> RESOLVED 2026-08-15; remediation execution-log
residual 7 -> resolved; phase-8-checklist WP-4 section replaced with the
measured numbers.
Final consistency sweep per plan §6: verified component docs against shipped
WP1-WP3 + adversarial-review-fix state, corrected drift found in SiteRuntime
(recursion-exempt run cap, stale ScriptExecutionActor/AlarmExecutionActor
references), TemplateEngine (BundleImporter watermark path), DeploymentManager
(phase-2 PendingDeployment staging), CentralUI (shared KPI cache, dedup'd alarm
poll, render coalescing), StoreAndForward (rate-limited drop logging), and
ConfigurationDatabase (documented DbContext-pooling non-adoption). Updated the
docs/components/ developer-reference set (SiteRuntime, SiteEventLogging,
InboundAPI) to drop the deleted per-run actor classes. Amended one known-issue
for the superseding MaxBatchSize:64 read-page pin. Added CLAUDE.md bullets for
stream graceful-completion reconnect, the required site audit DB path, honest
CLI HTTP timeouts, bulk DeploySiteAsync, and LocalDb 0.2.1. New execution log
records the phase→commit map, gate results, adversarial-review tally, the
three test-flake root causes, and the nine-item residuals register.
Joseph Doherty