What are Redis memory optimization techniques?

Redis memory optimization strategies: • Data Structure Optimization:** # Use hashes for small objects # Instead of: SET user:1000:name "John" SET user:1000:email "john@example.com" SET user:1000:age "30" # Use: HMSET user:1000 name "John" email "john@example.com" age "30" • Key Naming Strategies:** # Short, consistent key names # Bad: "user:profile:personal:information:1000" # Good: "u:p:1000" # Use hash tags for clustering SET {user:1000}:profile "data" SET {user:1000}:settings "config" • Memory Configuration:** # redis.conf optimizations maxmemory 2gb maxmemory-policy allkeys-lru # Compression settings hash-max-ziplist-entries 512 hash-max-ziplist-value 64 list-max-ziplist-size -2 set-max-intset-entries 512 zset-max-ziplist-entries 128 • Data Expiration:** # Set TTL on temporary data r.setex('session:abc123', 3600, session_data) # 1 hour r.expire('cache:product:456', 1800) # 30 minutes # Lazy expiration r.set('temp:data', value) r.expire('temp:data', 300) # 5 minutes • Memory Analysis:** # Check memory usage INFO memory MEMORY USAGE mykey MEMORY STATS # Find large keys redis-cli --bigkeys redis-cli --memkeys **Best Practices:** • Monitor memory usage regularly • Use appropriate data structures • Set expiration on temporary data • Compress large values • Use memory-efficient key naming