Memcached data loss on server crash or restart

Memory-based caching (Memcached) stores data entirely in RAM, causing all cached data to be lost when server crashes or restarts. Application experiences cold cache state requiring full repopulation.

Never rely on Memcached for persistent or critical data storage. Implement cache warm-up logic after server restarts to preload frequently accessed data. Monitor cache hit rates after restarts and consider Redis with persistence if data retention across restarts is required.