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PUBSUB NUMSUB

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PUBSUB NUMSUB [channel [channel ...]]
Group
Pub/Sub
Complexity
O(N) for N channels
Arity
-2 (at least 2 words, counting the command name)
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PUBSUB NUMSUB returns, for each channel you name, how many connections on this node subscribe to it with SUBSCRIBE. Pattern subscriptions are not counted. Without channels it returns an empty array.

Return value

Section titled “Return value”
Case RESP2 RESP3
Always Flat array of channel, count pairs, in the order given Same flat array

Examples

Section titled “Examples”
127.0.0.1:6379> PUBSUB NUMSUB news alerts quiet
1) "news"
2) (integer) 2
3) "alerts"
4) (integer) 1
5) "quiet"
6) (integer) 0

Compatibility

Section titled “Compatibility”

Same as Redis 7 and Valkey 8.

See also

Section titled “See also”

PUBSUB CHANNELS, PUBSUB SHARDNUMSUB, PUBSUB