Postmortem: The Free Tier Wasn't the Problem — Our Guardrails Were

Описание и применение

Внедрение ограничений на параллелизм, повторные попытки и дневной бюджет избавило от сбоев в CI‑пайплайне, повысило надёжность и уменьшило задержки.

Задача

CI pipeline failed because free tier guardrails were missing, causing retry storms, OOM, and incomplete reviews.

Результат

Guardrails reduced failure rate from 39% to 6%, eliminated OOM and retry storms, and improved latency.

Рабочий процесс

• 1. Identify free tier usage in CI pipeline
• 2. Build GuardedClient with concurrency, retry, budget limits
• 3. Wrap API calls with GuardedClient
• 4. Add endpoint routing decision matrix to route critical tasks to paid tier
• 5. Monitor success rate, latency, and budget usage
• 6. Adjust parameters (max_concurrency, max_retries, daily_budget) as needed

Доказательства

The first rate limit responses arrived. HTTP 429 mixed with HTTP 200 in the logs.

Источник

Success rate: 94% (up from 61%)

Источник

No OOM or retry storm

Источник