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負荷テスト・シミュレーター

1分以内にプロフェッショナルな load test シナリオを構築:VU、ramp-up、plateau、トラフィック分布、専門家アドバイス。

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Quick glossary

VU (Virtual User)

Virtual user simulated in parallel by k6/JMeter/Gatling. Load metric #1.

Ramp-up

Progressive climb from 0 → target load. Gives autoscalers time to react.

Plateau

Load held at target. Where you measure stability and SLOs.

P95 (latency)

95% of requests answer faster than this. Better than average for UX.

P99 (latency)

Catches the slowest requests (cold-starts, GC pauses, locks). Reveals anomalies.

RPM / RPS

Requests per minute (or per second). Effective throughput absorbed by the system.

Throughput

Volume of requests handled over time. Measure on plateau, not peak.

SLO

Service Level Objective. Numeric target to honor (e.g. P95 ≤ 500ms, errors ≤ 1%).

🧩

プロジェクトコンテキスト

コンテキストが詳細なほど、アドバイスは鋭くなります

Everything flows through a single deployable. Typical bottlenecks: shared DB, locks, transactions too wide.

テストパラメーター

目標負荷と継続時間を設定

合計VU500 VU
ランプアップ時間5
プラトー時間15
ユーザーあたりアクション/分6
🎯

ユーザーシナリオ

パーセンテージの合計は100%(現在:100%)

#1
トラフィック比率:75%
VU: 375アクション: 2250/min
#2
トラフィック比率:20%
VU: 100アクション: 600/min
#3
トラフィック比率:5%
VU: 25アクション: 150/min

推定総ボリューム

~52 500

20分間 (ramp-up + plateau)

目標負荷

500

Throughput

3 000/min

総時間

20 分

%の一貫性

100%

合計100%

シナリオ別内訳

search-cart375 VU · 2250/min
checkout100 VU · 600/min
signup25 VU · 150/min
📊

Timintアプリでプロ版へ

結果を分析(P95/P99、エラー、スコア)、専門家の修正アドバイスを取得、スタイリッシュなPDF監査レポートを生成。

✅ 自動計算されたパフォーマンススコア

✅ パフォーマンスとクラウドの専門家アドバイス

✅ グラフ付きPDFレポート + プロフィール保存

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Detailed shot plan

Total and per-scenario load at each ramp-up step, then on plateau

PhaseTimingTotal VUTotal req/minsearch-cart
(75%)
checkout
(20%)
signup
(5%)
Ramp-up step 1/4 (25%)T+1.3 12575094 ·56325 ·1506 ·38
Ramp-up step 2/4 (50%)T+2.5 2501 500188 ·1 12550 ·30013 ·75
Ramp-up step 3/4 (75%)T+3.8 3752 250281 ·1 68875 ·45019 ·113
Ramp-up step 4/4 (100%)T+5.0 5003 000375 ·2 250100 ·60025 ·150
Sustained plateauT+520 5003 000375 ·2 250100 ·60025 ·150
Estimated volume: ~7 500 actions during ramp-up + ~45 000 actions during plateau = ~52 500 requests total.
⚠️

Risks per critical service

4 service(s) checked — each exposed service has its own risk profile

Risk認証

Auth saturation = session blocks and refresh-token loops. Watch: users-table DB pool, JWT cache, /login throttling.

Risk検索

Search latency → instant cart abandonment. Bottlenecks: Elasticsearch / Algolia indexes, facet queries, full-text scans.

RiskCheckout

Checkout failure = direct revenue loss. Measure the full funnel (cart → shipping → payment → confirmation).

Risk決済

PSP error = lost payments or double charges. Idempotency keys are mandatory, PSP A → B failover in < 60s.

🏛️

Expert recommendationsモノリス

DevOps, SRE and Solution Architect tips tailored to your architecture

🛠️

🛠️ DevOps & Cloud scale

  • Profile the 10 most expensive endpoints before the test (APM: Datadog, NewRelic, Sentry Performance)
  • Enable DB slow query log and archive it during the test for post-mortem analysis
  • Provision +30% CPU/RAM during the test if stateful — otherwise scale horizontally with round-robin LB
  • Freeze deployments and disable cron jobs during the test window
⚙️

⚙️ SRE / Platform

  • Define the 4 golden signals BEFORE the test: latency, traffic, errors, saturation
  • Alert on SLOs (P95, error rate), not raw CPU thresholds
  • Prepare a read-only degraded DB mode in case of unexpected saturation
  • Test rollback of the previous deployment in under 5 minutes
🏛️

🏛️ Solution architect

  • Identify bounded contexts (DDD) to prepare a potential split into modular monolith
  • Progressively move heavy jobs (PDFs, emails, exports) to a queue + worker
  • Externalize sessions to Redis before scaling horizontally (stateless first)
  • Measure operational cost per feature to target the next split
🎯

Expert advice tailored to the projectEC

Recommendations specific to the business constraints of your project type

Long cache on product pages (edge + CDN), targeted invalidation from PIM
Short Redis lock on stock decrement to prevent overselling
Move transactional emails out of the sync path (queue + dedicated worker)
Idempotency keys on order creation + payment capture
PSP A → PSP B failover plan in < 60s in case of incident
Prepare for peaks (BF, sales) with a test ≥ 5× average traffic
📦

Ready-to-copy k6 code

Script auto-generated with your parameters + scenarios + SLO thresholds

import http from 'k6/http';
import { sleep, group } from 'k6';

export const options = {
  stages: [
    { duration: '1.3m', target: 125 },
    { duration: '1.3m', target: 250 },
    { duration: '1.3m', target: 375 },
    { duration: '1.3m', target: 500 },
    { duration: '15m', target: 500 },
  ],
  thresholds: {
    http_req_duration: ['p(95)<500', 'p(99)<1500'],
    http_req_failed:   ['rate<0.01'],
  },
};

export default function () {
  group('search-cart', () => {
    // 75% du trafic — 375 VU cible · 2250 req/min
    // TODO: implement requests for the search-cart scenario
  });
  group('checkout', () => {
    // 20% du trafic — 100 VU cible · 600 req/min
    // TODO: implement requests for the checkout scenario
  });
  group('signup', () => {
    // 5% du trafic — 25 VU cible · 150 req/min
    // TODO: implement requests for the signup scenario
  });
  sleep(10.0);
}

Pre-shot checklist

Tick before launching to avoid false alarms

#1Isolated test accounts (no mix with real users)
#2Representative test catalog / data (size, distribution)
#3Monitoring active: dashboards ready + alerts on key SLOs
#4Structured logs and trace ID propagated across all hit services
#5PSP in sandbox mode + 3DS test mode enabled
#6Freeze deployments and disable crons during the window
#7Hosting / cloud provider notified about the test (capacity + budget alerts)
#8Rollback plan ready and tested: < 5 min to revert to previous state
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Timint Smart Tips

AI
💳

決済サービスを選択:PSPのサンドボックスを使用し、3DS retries / idempotency keys を計画してください。

🛒

EC + 検索:人気facetをインデックス化し、頻出クエリに短時間キャッシュを有効化。

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