PEXPIRE
PEXPIRE key milliseconds  Available since 2.6.0. Time complexity: O(1)  This command works exactly like EXPIRE but the time to live of the key is specified in milliseconds instead of seconds. Return value Integer reply, specifically:  
1 if the timeout was set. 
0 if key does not exist.  Examples  redis>  SET mykey "Hello" "OK" redis>  PEXPIRE mykey 1500 (integer) 1 redis>  TTL mykey (integer) 1 redis>  PTTL mykey (integer) 1459
 

    
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