The Memcached stats command is used to return statistics such as PID (process number), version number, number of connections, etc.
grammar:
The basic syntax of the stats command is as follows:
stats
example
In the following example, we used 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
A lot of status information is displayed here, and each status item is explained in detail below:
- pid : memcache server process ID
- uptime : the number of seconds the server has been running
- time : the server's current Unix timestamp
- version : memcache version
- pointer_size : OS pointer size
- rusage_user : cumulative user time of the process
- rusage_system : cumulative system time of the process
- curr_connections : the current number of connections
- total_connections : The total number of connections since Memcached was running
- connection_structures : The number of connection structures allocated by Memcached
- cmd_get : Number of get command requests
- cmd_set : the number of set command requests
- cmd_flush : the number of flush command requests
- get_hits : the number of hits of the get command
- get_misses : Number of get command misses
- delete_misses : The number of times the delete command was missed
- delete_hits : The number of hits of the delete command
- incr_misses : The number of incr command misses
- incr_hits : The number of incr command hits
- decr_misses : The number of decr command misses
- decr_hits : The number of hits of the decr command
- cas_misses : Number of cas command misses
- cas_hits : The number of hits of the cas command
- cas_badval : the number of wipes used
- auth_cmds : The number of times the authentication command was processed
- auth_errors : number of authentication failures
- bytes_read : total bytes read
- bytes_written : total bytes sent
- limit_maxbytes : total size of allocated memory (bytes)
- accepting_conns : Whether the server has reached the maximum connection (0/1)
- listen_disabled_num : The number of disabled listeners
- threads : the current number of threads
- conn_yields : The number of active abandonment of connection operations
- bytes : the number of bytes currently occupied by the storage
- curr_items : the total number of data currently stored
- total_items : total number of data stored since startup
- evictions : the number of objects released by the LRU
- reclaimed : the number of expired data entries to store new data