telnet localhost 200001 #登陆
stats #查看状态
flush_all #清理
quit #退出
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首先，需要了解Memcached协议，如果不清楚可参考《Memcached 协议中英文对照：http://bbs.chinaitlab.com/thread-308784-1-1.html》。
1、数据存储（假设key为zhangyan，value为12345）
| printf "set zhangyan 0 0 5\r\n12345\r\n" | nc 127.0.0.1 11211 |
STORED
2、数据取回（假设key为zhangyan）
| printf "get zhangyan\r\n" | nc 127.0.0.1 11211 |
VALUE zhangyan 0 5
12345
END
3、数值增加1（假设key为zhangyan，并且value为正整数）
| printf "incr zhangyan 1\r\n" | nc 127.0.0.1 11211 |
12346
4、数值减少3（假设key为zhangyan，并且value为正整数）
| printf "decr zhangyan 3\r\n" | nc 127.0.0.1 11211 |
12343
5、数据删除（假设key为zhangyan）
| printf "delete zhangyan\r\n" | nc 127.0.0.1 11211 |
DELETED
6、查看Memcached状态
| printf "stats\r\n" | nc 127.0.0.1 11211 |
STAT pid 3025
STAT uptime 4120500
STAT time 1228021767
STAT version 1.2.6
STAT pointer_size 32
STAT rusage_user 433.463103
STAT rusage_system 1224.515845
STAT curr_items 1132460
STAT total_items 8980260
STAT bytes 1895325386
STAT curr_connections 252
STAT total_connections 547850
STAT connection_structures 1189
STAT cmd_get 13619685
STAT cmd_set 8980260
STAT get_hits 6851607
STAT get_misses 6768078
STAT evictions 0
STAT bytes_read 160396238246
STAT bytes_written 260080686529
STAT limit_maxbytes 2147483648
STAT threads 1
END
7、模拟top命令，查看Memcached状态：
| watch "printf 'stats\r\n' | nc 127.0.0.1 11211" |
或者
| watch "echo stats | nc 127.0.0.1 11211" |