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

说明与用途

通过添加并发限制、重试上限和每日预算，消除了 CI 流水线故障，提高了可靠性并降低了延迟。

问题

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

结果

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

工作流

• 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

证据

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

来源

Success rate: 94% (up from 61%)

来源

No OOM or retry storm

来源