Linux Learning notes Summary--memcached configuration

Memcached is a high-performance distributed memory object caching system that can be used to store data in a variety of formats, including images, videos, files, and database retrieval results, by maintaining a unified, huge hash table in memory. The simple thing is to call the data into memory and then read it from memory, which greatly improves the reading speed.

Yum Install libevent-devel-y libevent Library

Tar xvzf memcached-1.4.  -  -s/application/memcached-1.4.  /usr/local/memcached. /configure--prefix=/application/memcached-1.4.20Makemake Install

/usr/local/memcached/bin/memcached-d-M 64-i 20m-u root-l 192.168.4.86-p 11211-c 1024-p/USR/LOCAL/MEMCACHED/MEMCAC Hed.pid

Options	Meaning description
-D	Specifies that the memcached process is started as a daemon process
M <num>	Specify the amount of memory allocated to memcached, in megabytes
-U <username>	Users running the memcached
-L <ip_addr>	The server IP address of the listener, if there are multiple addresses, separated by commas, the format can be "IP address: Port number", for example:-L to specify 192.168.0.184:19830,192.168.0.195:13542; Port number can also be specified by the-p option
-P <num>	Memcached Listen on the port, to ensure that the port number is not occupied
-C <num>	Set the maximum number of concurrent connections to run, default is 1024
-R <num>	To avoid client starvation (starvation), set a limit on the number of consecutive client requests to be reached, and if this setting is exceeded, another connection is selected to process the request, which defaults to 20
-K	Set the memory to lock all paging, and use this option sparingly for large cache scenarios
-P	Save the PID file for the memcached process
-S <file>	Specify the UNIX socket file that memcached uses for listening
-A <perms>	Set the-S option to specify the permissions of the UNIX socket file
-U <num>	Specifies the port on which UDP is listening, by default 11211,0 means shutdown
-M	Disables automatic purging of data items in the cache when memory usage exceeds the configured value, at which point memcached is not allowed until memory is freed
-R	Set the resulting core file size
-F <factor>	Multiplier factor for calculating the memory block size of cached data items, default is 1.25
-N	Sets the minimum number of bytes allocated for the key, value, flag of the cached data item, which is 48 by default
-C	Disable CAs
-H	Display memcached version and summary information
-V	Output warnings and error messages
-vv	Print information more detailed than-V: not only output warnings and error messages, but also output client request and response information
-I.	Print licenses information for libevent and memcached
-T <threads>	Specifies the number of threads used to process the request, which defaults to 4
-D <char>	The delimiter between the key prefix and the ID in the statistics report, which is the colon ":" By default.
-L	Try using large memory paging (pages)
b <proto>	Specifies the protocol used, the default behavior is auto-negotiation (autonegotiate), and the options that may be used are auto, ASCII, binary.
-I <size>	Overrides the default Stab page size, which is 1M by default
-F	Disable the Flush_all command
-O <options>	Specify comma-delimited options, typically used for extended or experimental properties

Memcached can start multiple instances, specify different ports

Put the above command in the/etc/rc.local, set the boot start

telnet 127.0.0.1 11211 连接数据库

Stats command

This command is used to display server information, statistical data

Linux Learning notes Summary--memcached configuration