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KEEP_ALIVE.md

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Preventing Render Cold Starts

Background

The Eduhaven backend is hosted on Render Free Tier, which automatically puts the instance to sleep after around 50 seconds of inactivity.
When the instance wakes up (cold start), it causes 3–15 seconds delay for the first user request.

Solution

We use an external service — cron-job.org — to send a request to the backend every 1 minute.
This keeps the backend active and eliminates most cold start delays.

Cron Job Details

  • Service: cron-job.org
  • URL to ping:
    https://eduhaven-backend.onrender.com/
  • Frequency: Every 1 minute
  • Method: GET
  • Expected Response: HTTP 200 OK

How to Set Up Your Own Cron Job

  1. Go to cron-job.org.
  2. Create a free account.
  3. Add a New Cronjob:
    • Title: Eduhaven Keep Alive
    • URL: https://eduhaven-backend.onrender.com/
    • Schedule: Every 1 minute
  4. Save and activate.
  5. Check the execution history tab to confirm requests are successful.