redis commands zsets bzpopmin

BZPOPMIN

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When data arrives, pop the smallest value first

Usage is bzpopmin key [key ...] timeout.
If the set already has data, it is the same as ZPOPMIN. If there is no data, it waits for timeout (seconds). timeout is specified in seconds, and 0 waits until data is entered when the set is empty. When data arrives it pops and shows key, value, score, and elapsed time (seconds).
See BLPOP for the blocking concept.

Syntax

BZPOPMIN key [key ...] timeout

• Available since version 5.0.0.
• Time complexity is O(log(N)). N is the number of members in the set.