Redis

Keys & Expiration

Set TTL, scan keys, and inspect the keyspace.

#ttl#expiration#scan

Code

redis

# Set TTL on existing keys
EXPIRE session:abc 3600       # seconds
EXPIREAT cache:hot 1700000000 # unix timestamp
PEXPIRE token:xyz 60000       # milliseconds
TTL session:abc
PTTL session:abc

# Set + TTL atomically
SET token:xyz "data" EX 60

# Persist (remove TTL)
PERSIST session:abc

# Inspect the keyspace
KEYS user:*       # avoid in production
SCAN 0 MATCH user:* COUNT 100
TYPE user:1
OBJECT IDLETIME user:1
RANDOMKEY
DBSIZE

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