PING · Valkey

PING

Returns the server’s liveliness response.

Usage

PING [message]

Description

Returns PONG if no argument is provided, otherwise return a copy of the argument as a bulk. This command is useful for: 1. Testing whether a connection is still alive. 1. Verifying the server’s ability to serve data - an error is returned when this isn’t the case (e.g., during load from persistence or accessing a stale replica). 1. Measuring latency.

If the client is in RESP2 and is subscribed to a channel or a pattern, it will instead return a multi-bulk with a “pong” in the first position and an empty bulk in the second position, unless an argument is provided in which case it returns a copy of the argument.

Reply

Any of the following:

Complexity

O(1)

ACL Categories

@connection @fast

Examples

127.0.0.1:6379> PING
PONG
127.0.0.1:6379> 
127.0.0.1:6379> PING "hello world"
"hello world"

History

See also

AUTH, CLIENT, CLIENT CACHING, CLIENT CAPA, CLIENT GETNAME, CLIENT GETREDIR, CLIENT HELP, CLIENT ID, CLIENT INFO, CLIENT KILL, CLIENT LIST, CLIENT NO-EVICT, CLIENT NO-TOUCH, CLIENT PAUSE, CLIENT REPLY, CLIENT SETINFO, CLIENT SETNAME, CLIENT TRACKING, CLIENT TRACKINGINFO, CLIENT UNBLOCK, CLIENT UNPAUSE, ECHO, HELLO, RESET, SELECT.