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How We Reset Monthly Quotas Without Race Conditions or Cron Drift

This article was originally published on Jo4 Blog . If you're billing monthly via Stripe or RevenueCat, it's tempting to reset usage quotas inside your webhook handler.

  • Reset monthly quotas without race conditions or cron drift
  • Use Spring Scheduler with 5-minute past midnight UTC cron
  • Instance-level advisory lock prevents simultaneous resets

What Actually Happens When You Put a CDN in Front of Your Website?

If you've worked on web performance for any amount of time, you've probably heard the advice: “Put it behind a CDN.” But what does a CDN actually do between the browser and your server?

  • CDN creates edge servers closer to users, reducing latency
  • Without CDN, user in Singapore accesses US-origin server, increasing latency
  • CDN effectiveness depends on TTL, cache hits/misses, purge mechanism

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