Memcached stats Command

The Memcached stats command is used to return statistical information such as PID (Process ID), version number, number of connections, etc.

Syntax:

The basic syntax format for the stats command is as follows:

stats

Example

In the following example, we use the stats command to output Memcached service information.

stats
STAT pid 1162
STAT uptime 5022
STAT time 1415208270
STAT version 1.4.14
STAT libevent 2.0.19-stable
STAT pointer_size 64
STAT rusage_user 0.096006
STAT rusage_system 0.152009
STAT curr_connections 5
STAT total_connections 6
STAT connection_structures 6
STAT reserved_fds 20
STAT cmd_get 6
STAT cmd_set 4
STAT cmd_flush 0
STAT cmd_touch 0
STAT get_hits 4
STAT get_misses 2
STAT delete_misses 1
STAT delete_hits 1
STAT incr_misses 2
STAT incr_hits 1
STAT decr_misses 0
STAT decr_hits 1
STAT cas_misses 0
STAT cas_hits 0
STAT cas_badval 0
STAT touch_hits 0
STAT touch_misses 0
STAT auth_cmds 0
STAT auth_errors 0
STAT bytes_read 262
STAT bytes_written 313
STAT limit_maxbytes 67108864
STAT accepting_conns 1
STAT listen_disabled_num 0
STAT threads 4
STAT conn_yields 0
STAT hash_power_level 16
STAT hash_bytes 524288
STAT hash_is_expanding 0
STAT expired_unfetched 1
STAT evicted_unfetched 0
STAT bytes 142
STAT curr_items 2
STAT total_items 6
STAT evictions 0
STAT reclaimed 1
END

This displays a lot of status information, which is detailed below for each status item:

• pid: Memcache server process ID
• uptime: Server uptime in seconds
• time: Current Unix timestamp of the server
• version: Memcache version
• pointer_size: Operating system pointer size
• rusage_user: Accumulated user time for the process
• rusage_system: Accumulated system time for the process
• curr_connections: Current number of connections
• total_connections: Total number of connections since Memcached started
• connection_structures: Number of connection structures allocated by Memcached
• cmd_get: Number of get commands requested
• cmd_set: Number of set commands requested
• cmd_flush: Number of flush commands requested
• get_hits: Number of get command hits
• get_misses: Number of get command misses
• delete_misses: Number of delete command misses
• delete_hits: Number of delete command hits
• incr_misses: Number of incr command misses
• incr_hits: Number of incr command hits
• decr_misses: Number of decr command misses
• decr_hits: Number of decr command hits
• cas_misses: Number of cas command misses
• cas_hits: Number of cas command hits
• cas_badval: Number of times used擦拭次数
• auth_cmds: Number of authentication commands processed
• auth_errors: Number of authentication failures
• bytes_read: Total bytes read
• bytes_written: Total bytes written
• limit_maxbytes: Total memory size allocated in bytes
• accepting_conns: Whether the server has reached the maximum number of connections (0/1)
• listendisablednum: Number of disabled listens
• threads: Current number of threads
• conn_yields: Number of times connection operations voluntarily yielded
• bytes: Current number of bytes used for storage
• curr_items: Current number of items stored
• total_items: Total number of items stored since startup
• evictions: Number of LRU evictions
• reclaimed: Number of expired items used to store new data