Ask HN: What huge mistake did you make early in your career?
4 by jamestimmins | 6 comments on Hacker News.
We’ve all been there — a seemingly huge mistake as an intern or Junior developer that you were sure would get you fired. What’s your story? Mine: I nearly took down production by joining multiple large tables on non-indexed columns. Every time a product was updated on the site, MySQL would run my query and join across millions of records. Infrastructure folks couldn’t figure out why the DB servers kept rubbing out of memory, and I very nervously made the fix. Thankfully the team was understanding (and appreciated that the person reviewing my code had messed up), but it was a terrible day.