docs(bootstrap): finalize U-K3 evidence with clean-24h confirmation (#5338) by koala73 · Pull Request #5363 · koala73/worldmonitor

koala73 · 2026-07-17T20:43:53Z

Follow-up to #5357 (merged). Updates the U-K3 verify artifact from the ~16h read to the clean 24h window (2026-07-16 12:00 → 2026-07-17 12:00 UTC) that the scheduled confirmation just ran.

Verdict unchanged: GO, now confirmed at the full window.

KV 99.6% under the 1200ms mobile budget (77.5k reads) vs Redis 84.4% — identical to the 8h/16h reads, peak captured.
KV wins every continent; rescues Africa (Redis 40% ok) and Oceania (39%); serves MENA at 269ms/100% (Vercel has no ME region). Only US-East has Redis faster, both trivially under budget.
Jakarta now passes (799ms, was 1341 at 16h) — small-sample jitter resolved as predicted; no high-traffic metro regressed.
Pipeline health over the window: 99.90% valid kv, zero stale/miss/invalid; publisher still writing valid envelopes at window close.

Docs-only. The U-K4 serving code (hedge + KTD3/KTD4 guards) already merged inert via #5357; the staged flag flip (off→slow→all) remains a separate, manual step.

…5338) Clean 24h window (77.5k KV / 2.48k Redis) confirms the GO: KV 99.6% under budget vs Redis 84.4%, every continent won, no high-traffic metro regressed. Jakarta now passes (799ms, was 1341 at 16h = small-sample jitter, as predicted). Pipeline healthy: 99.90% valid kv, zero stale/miss over the window.

vercel · 2026-07-17T20:43:59Z

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mintlify · 2026-07-17T20:45:24Z

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mintlify · 2026-07-17T20:46:00Z

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greptile-apps · 2026-07-17T20:46:50Z

Greptile Summary

This docs-only PR finalises the U-K3 evidence artifact by replacing the preliminary ~16 h read with the complete clean 24 h window (2026-07-16 12:00 → 2026-07-17 12:00 UTC, 77.5k KV reads), updating all per-continent and per-country latency figures and confirming Jakarta's earlier over-budget reading was small-sample jitter.

Updated the headline table (KV p95 328→321 ms, Redis %ok 82.4→84.4 %), per-continent table, MENA country breakdown (UAE added, Turkey sample grown), and top-countries traffic list to reflect the full 24 h dataset.
Stability section now records the identical 99.6 % pass rate across all three reads (8 h / 16 h / 24 h) and documents pipeline health (99.90 % valid KV, zero stale/miss/invalid).
Go/no-go verdict is unchanged: GO, with a pointer to U-K4 (PR feat(bootstrap): serve public tier from KV via the Worker (U-K4, #5338) #5357, merged inert) and the staged flag flip as the next manual step.

Confidence Score: 4/5

Safe to merge — purely documentation, no executable code changed.

The change is a docs-only metric update and the numbers are internally consistent: 307 / 77.5k = 0.40 %, continent fractions check out, and Jakarta's trajectory (1341 → 799 ms) matches the stated jitter narrative. The one open item is the missing YAML frontmatter that every docs/solutions/ file is expected to carry, which could affect docs-site indexing.

docs/solutions/2026-07-16-bootstrap-kv-verify.md — missing YAML frontmatter (module, tags, problem_type).

Important Files Changed

Filename	Overview
docs/solutions/2026-07-16-bootstrap-kv-verify.md	Documentation-only update: promotes metrics from the ~16 h read to the clean 24 h window (77.5k KV / 2.48k Redis reads), updates per-continent and per-country figures, confirms Jakarta jitter resolved. Missing YAML frontmatter required by docs/solutions/ convention.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Bootstrap KV Shadow Read\n77.5k reads · 24 h window] --> B{Budget: p95 ≤ 1200 ms?}
    B -- KV: p95 321 ms\n99.6 % pass --> C[✅ KV PASSES]
    B -- Redis: p95 1567 ms\n84.4 % pass --> D[❌ Redis FAILS]

    C --> E[By continent]
    E --> F[N. America\nKV 204 ms · 100 %]
    E --> G[Europe\nKV 89 ms · 100 %]
    E --> H[Middle East\nKV 269 ms · 100 %\nno Vercel region]
    E --> I[Africa\nKV 630 ms · 99 %\nRedis 1990 ms · 40 %]
    E --> J[Oceania\nKV 724 ms · 97 %\nRedis 1698 ms · 39 %]
    E --> K[S. Asia\nKV 583 ms · 99 %]
    E --> L[E/SE Asia\nKV 362 ms · 100 %]
    E --> M[LatAm\nKV 355 ms · 100 %]

    C --> N[Residual 0.40 %\n307 reads over budget\nremote POPs only\nKV still beats Redis there]
    C --> O[GO — confirmed\nProceed to U-K4\nstage flag flip off→slow→all]

%%{init: {'theme': 'base', 'themeVariables': {"darkMode": true, "background": "#0d1117", "primaryColor": "#21262d", "primaryTextColor": "#e6edf3", "primaryBorderColor": "#8b949e", "lineColor": "#8b949e", "textColor": "#e6edf3", "edgeLabelBackground": "#161b22", "actorBkg": "#21262d", "actorBorder": "#8b949e", "actorTextColor": "#e6edf3", "actorLineColor": "#8b949e", "signalColor": "#8b949e", "signalTextColor": "#e6edf3", "noteBkgColor": "#373320", "noteBorderColor": "#d4a72c", "noteTextColor": "#f0e6c0", "labelBoxBkgColor": "#21262d", "labelBoxBorderColor": "#8b949e", "labelTextColor": "#e6edf3", "loopTextColor": "#e6edf3", "activationBkgColor": "#30363d", "activationBorderColor": "#8b949e"}}}%%
flowchart TD
    A[Bootstrap KV Shadow Read\n77.5k reads · 24 h window] --> B{Budget: p95 ≤ 1200 ms?}
    B -- KV: p95 321 ms\n99.6 % pass --> C[✅ KV PASSES]
    B -- Redis: p95 1567 ms\n84.4 % pass --> D[❌ Redis FAILS]

    C --> E[By continent]
    E --> F[N. America\nKV 204 ms · 100 %]
    E --> G[Europe\nKV 89 ms · 100 %]
    E --> H[Middle East\nKV 269 ms · 100 %\nno Vercel region]
    E --> I[Africa\nKV 630 ms · 99 %\nRedis 1990 ms · 40 %]
    E --> J[Oceania\nKV 724 ms · 97 %\nRedis 1698 ms · 39 %]
    E --> K[S. Asia\nKV 583 ms · 99 %]
    E --> L[E/SE Asia\nKV 362 ms · 100 %]
    E --> M[LatAm\nKV 355 ms · 100 %]

    C --> N[Residual 0.40 %\n307 reads over budget\nremote POPs only\nKV still beats Redis there]
    C --> O[GO — confirmed\nProceed to U-K4\nstage flag flip off→slow→all]

Comments Outside Diff (1)

docs/solutions/2026-07-16-bootstrap-kv-verify.md, line 1 (link)

Missing YAML frontmatter for docs/solutions/ file

Per AGENTS.md, every file under docs/solutions/ should carry YAML frontmatter with module, tags, and problem_type fields. This file has none. Markdownlint won't catch it, but the convention is documented and helps the docs site index the solution correctly.

Context Used: AGENTS.md (source)

Note: If this suggestion doesn't match your team's coding style, reply to this and let me know. I'll remember it for next time!

_{Reviews (1): Last reviewed commit: "docs(bootstrap): finalize U-K3 evidence ..." | Re-trigger Greptile}

mintlify Bot deployed to staging - docs July 17, 2026 20:45 View deployment

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koala73 merged commit d94d860 into main Jul 17, 2026
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koala73 deleted the docs/uk3-evidence-final branch July 17, 2026 20:50

This was referenced Jul 20, 2026

docs(solutions): capture two reusable learnings from the KV cutover (#5338) #5383

Merged

chore(bootstrap): wind down the R2-origin experiment (DebugBear sampling + KTD7 no-go) #5536

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docs(bootstrap): finalize U-K3 evidence with clean-24h confirmation (#5338)#5363

docs(bootstrap): finalize U-K3 evidence with clean-24h confirmation (#5338)#5363
koala73 merged 1 commit into
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docs/uk3-evidence-final

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Greptile Summary

Confidence Score: 4/5

Important Files Changed

Flowchart

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