Why Your Caching Strategy Probably Has the Same 4 Holes

A cache stampede occurred due to a synchronized expiration of a popular product page, causing 14,000 concurrent requests to rebuild the cache from the underlying store, leading to a database outage. To prevent this, implement TTL jitter and single-flight on miss. TTL jitter adds a random fraction to every TTL, while single-flight on miss ensures only one request rebuilds the cache and the rest wait for its result.