Show slow query log

Last 20 slow commands with execution time in microseconds

redis-cli SLOWLOG GET 20

More redis commands

Memory usage per key pattern

redis-cli --scan --pattern 'session:*' | xargs -n1 redis-cli MEMORY USAGE | awk '{sum+=$1} END{print sum/1024/1024" MB"}'

Total memory consumed by keys matching a pattern
Delete keys by pattern

redis-cli --scan --pattern 'cache:*' | xargs -r redis-cli DEL

Safely scan-delete matching keys without KEYS command
Set key with TTL

redis-cli SET mykey 'value' EX 3600

Set key with 1-hour expiry (EX = seconds)
Increment counter

redis-cli INCRBY counter:hits 1

Atomically increment an integer counter
Pub/Sub publish

redis-cli PUBLISH events '{"type":"login","user":"alice"}'

Publish a message to a Redis pub/sub channel