Memcached incr/decr 命令

incr/decr 对数值做原子自增自减，做计数器。

Beginner

Key Pointsincr/decr 在服务端原子执行，多客户端并发也不会数错。

用法

Shell

set views 0 0 1
0
incr views 1
incr views 10
decr views 5

Output

STORED
1
11
6

For hit counters and rate-limit counts, prefer incr/decr — far safer than get-increment-set, which loses updates under concurrency.

Shell

set views 0 0 1
0
incr views 1
incr views 10
decr views 5

Output

STORED
1
11
6

做访问计数器、限流计数首选 incr/decr——它比「get 出来 +1 再 set」安全得多，因为后者在高并发下会丢更新。