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PFCOUNT

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원소(element)의 개수를 조회

사용법은 pfcount key 입니다.
추정 오류는 1% 이하입니다.

Example

명령>	PFADD hllkey ele1 ele2 ele3
결과>	(integer) 1
명령>	PFADD hllkey ele4 ele5 ele6
결과>	(integer) 1
명령>	PFCOUNT hllkey
결과>	(integer) 6

명령문

PFCOUNT key [key ...]

이 명령은 version 2.8.9 부터 사용할 수 있다.
논리적 처리 소요시간은 O(1)이다.

<< PFADD	PFCOUNT	PFMERGE >>

조회수 :

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