Memcache monitoring Tool--stats

Memcache monitoring Tool--stats

Introduced

Memcache's stats command is the most basic tool for viewing memcache status.

Under the default instance, connect to Memcache by using a command such as Telnet 127.0.0.1 11211, and then enter stats to see the current status of Memcache.

The descriptions of these states are as follows:

Pid	Process ID of the Memcache server
Uptime	Number of seconds the server has been running
Time	Server's current UNIX timestamp
Version	Memcache version
Pointer_size	The current operating system pointer size (32-bit system is generally 32bit)
Rusage_user	Cumulative user time for the process
Rusage_system	Cumulative system time for processes
Curr_items	The number of items currently stored by the server
Total_items	The total number of items stored since the server was started
bytes	The number of bytes occupied by the current server store items
Curr_connections	Number of connections currently open
Total_connections	Number of connections that have been opened since the server was started
Connection_structures	Number of connection constructs allocated by the server
Cmd_get	Get command (GET) total number of requests
Cmd_set	Set command (Save) Total Request count
Get_hits	Total Hit Count
Get_misses	Total number of Misses
Evictions	Items deleted in order to get free memory (the space allocated to memcache needs to be deleted after the old items are allocated to the new items)
Bytes_read	Total bytes read (number of requests bytes)
Bytes_written	Total Bytes sent (bytes of result)
Limit_maxbytes	Size of memory allocated to Memcache (bytes)
Threads	Current number of threads

Related commands

Stats

Display server information, statistics, etc.

Stats Reset

Clear statistics

Stats malloc

Display memory allocation data

Stats Cachedump slab_id Limit_num

Displays a list of the first limit_num keys in a slab, shown in the following format

ITEM Key_name [Value_length b; expire_time|access_time S]

where memcached 1.2.2 and previous versions show the access Time (timestamp)

1.2.4 above, including 1.2.4 Display expiration Time (timestamp)

If the key,expire_time is never expired, it will be displayed as the server startup time

Stats Cachedump 7 2

ITEM Copy_test1 [+ b; 1207795754 S]

ITEM Copy_test [248 b; 1207793649 S]

Stats Slabs

Displays information about each slab, including the size, number, usage, etc. of the chunk

Stats items

Displays the number of item in each slab and the age of the oldest item (the number of seconds the last access distance is now)

Stats detail [On|off|dump]

Set or display detailed operation Records

parameter is on to open detailed operation record

parameter is off, close verbose operation record

The parameter is dump, showing the detailed operation record (number of times each key value get, set, hit, Del)

Stats Detail Dump

PREFIX Copy_test2 get 1 hit 1 set 0 del 0

PREFIX Copy_test1 get 1 hit 1 set 0 del 0

PREFIX cpy get 1 hit 0 set 0 del 0

This article is from the SQL Server deep dives blog, so be sure to keep this source http://ultrasql.blog.51cto.com/9591438/1637635

Memcache monitoring Tool--stats