# @thatcodergirlie on Instagram

- **Type:** Video
- **Original URL:** https://www.instagram.com/p/DSIND6rEaiK
- **Gondola URL:** https://gondola.cc/posts/61414650-thatcodergirlie-instagram
- **Thumbnail:** https://img.gondola.cc/tr:w-,h-,fo-auto/postThumbnails/cd95fc40ff.jpg
- **Posted:** 2025-12-11T15:27:58.000+00:00
- **Account Owner:** Ayushi Sharma | Coding | Software Engineer (@thatcodergirlie) — https://gondola.cc/thatcodergirlie

## Caption

Save & Share for future interviews🤝🏻

Comment “load” & I’ll share you a detail write-up of how to explain this in an interview 🙌🏻

Your load balancer is returning 503 for 20% of requests — what’s your immediate step?

1. Check LB target health — see if some instances/pods are marked unhealthy.

2. Verify recent deploy/config changes — rollback if errors started right after rollout.

3. Check backend metrics — CPU, memory, thread pool saturation, connection limits.

4. Remove/replace unhealthy instances from LB and scale out the service temporarily.

5. Throttle excessive traffic at edge (rate limiting) and increase cache usage to reduce load.

6. Check logs & health-check endpoints to confirm why LB thinks backends are unhealthy.

7. Monitor 503 rate after mitigation and then work on RCA (health check misconfig, overload, bug)

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## Stats

- **Views:** 52,346
- **Likes:** 1,297
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- **Comments:** 392

## Tags

codinglife, chatgpt, algorithms, softwareengineering, engineering, flipkart, scalablesystems, microsoft, amazon, softwaredeveloper, lld, databases, caching, softwareengineer, hld, datastructure, computerscience, interviewtips, interviewprep, codinginterview, opportunity, computerengineering, datastructuresandalgorithms, interviewpreparation, codingisfun, coding, jobs, systemdesign

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