PERSIST key

Available since 2.2.0.

Time complexity: O(1)

Remove the existing timeout on key, turning the key from volatile (a key with an expire set) to persistent (a key that will never expire as no timeout is associated).

*Return value

Integer reply, specifically:

  • 1 if the timeout was removed.
  • 0 if key does not exist or does not have an associated timeout.

*Examples

redis>  SET mykey "Hello" 
OK
redis>  EXPIRE mykey 10 
(integer) 1
redis>  TTL mykey 
(integer) 10
redis>  PERSIST mykey 
(integer) 1
redis>  TTL mykey 
(integer) -1
redis> 
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