🐛 The Bug That Only Happened on Fridays 📅😱

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🐛 The Bug Every Friday afternoon, our checkout service started throwing intermittent 500s. Whatever was eating connections wasn't customers. 🤔 🔍 Theory 1: A Slow Query Was Holding Connections Open This was the obvious first guess. Every connection was idle, not idle in transaction, not active. Connections opened and closed exactly as expected. That process restarted every Friday because an auto-scaling policy recycled idle instances weekly.

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