memcached telnet操作

telnet localhost 11211
//保存
set good 32 0 10
helloworld
STORED

//取回
gets good
VALUE good 32 10 10
helloworld
END

//替换
replace good 32 0 10
worldhello
STORED
get good
VALUE good 32 10
worldhello
END

//尾部添加
append good 32 0 5
after
STORED
get good
VALUE good 32 15
worldhelloafter
END

//头部添加
prepend good 32 0 6
before
STORED
get good
VALUE good 32 21
beforeworldhelloafter
END

//删除
delete good
DELETED
get good
END

delete good
NOT_FOUND

cas good 32 0 10 hel
helloworld
EXISTS

gets good
VALUE good 32 10 10
helloworld
END

cas bad 32 0 10 good
worldhello
NOT_FOUND

//统计
stats items
STAT items:1:number 1
STAT items:1:age 24
STAT items:1:evicted 0
STAT items:1:outofmemory 0
END

stats sizes
96 1
END

stats slabs
STAT 1:chunk_size 88
STAT 1:chunks_per_page 11915
STAT 1:total_pages 1
STAT 1:total_chunks 11915
STAT 1:used_chunks 11914
STAT 1:free_chunks 1
STAT 1:free_chunks_end 11913
STAT 2:chunk_size 112
STAT 2:chunks_per_page 9362
STAT 2:total_pages 1
STAT 2:total_chunks 9362
STAT 2:used_chunks 9361
STAT 2:free_chunks 1
STAT 2:free_chunks_end 9361
STAT 5:chunk_size 232
STAT 5:chunks_per_page 4519
STAT 5:total_pages 1
STAT 5:total_chunks 4519
STAT 5:used_chunks 4518
STAT 5:free_chunks 1
STAT 5:free_chunks_end 4518
STAT active_slabs 3
STAT total_malloced 3145472
END

stats items
STAT items:1:number 1
STAT items:1:age 1768
STAT items:1:evicted 0
STAT items:1:outofmemory 0
END

stats
STAT pid 18261
STAT uptime 528593
STAT time 1237277383
STAT version 1.2.6
STAT pointer_size 32
STAT rusage_user 0.004999
STAT rusage_system 0.015997
STAT curr_items 1
STAT total_items 2
STAT bytes 66
STAT curr_connections 2
STAT total_connections 13
STAT connection_structures 3
STAT cmd_get 11
STAT cmd_set 8
STAT get_hits 2
STAT get_misses 9
STAT evictions 0
STAT bytes_read 1342
STAT bytes_written 8752
STAT limit_maxbytes 134217728
STAT threads 1
END

使用usr/bin/perl /root/memcached-1.2.6/scripts/memcached-tool localhost:11211
output
# Item_Size   Max_age 1MB_pages Count   Full?
1      88 B     1531 s       1       1      no
2     112 B        0 s       1       0      no
5     232 B        0 s       1       0      no

# slab class编号
Item_Size Chunk大小
Max_age LRU内最旧的记录的生存时间
1MB_pages 分配给Slab的页数
Count Slab内的记录数
Full? Slab内是否含有空闲chunk