memcached 命令行参数解释

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memcached 启动命令参数原文

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memcached 1.4.16 -p <num>      TCP port number to listen on (default: 11211) -U <num>      UDP port number to listen on (default: 11211, 0 is off) -s <file>     UNIX socket path to listen on (disables network support) -A            enable ascii "shutdown" command -a <mask>     access mask for UNIX socket, in octal (default: 0700) -l <addr>     interface to listen on (default: INADDR_ANY, all addresses)               <addr> may be specified as host:port. If you don't specify               a port number, the value you specified with -p or -U is               used. You may specify multiple addresses separated by comma               or by using -l multiple times -d            run as a daemon -r            maximize core file limit -u <username> assume identity of <username> (only when run as root) -m <num>      max memory to use for items in megabytes (default: 64 MB) -M            return error on memory exhausted (rather than removing items) -c <num>      max simultaneous connections (default: 1024) -k            lock down all paged memory.  Note that there is a               limit on how much memory you may lock.  Trying to               allocate more than that would fail, so be sure you               set the limit correctly for the user you started               the daemon with (not for -u <username> user;               under sh this is done with 'ulimit -S -l NUM_KB'). -v            verbose (print errors/warnings while in event loop) -vv           very verbose (also print client commands/reponses) -vvv          extremely verbose (also print internal state transitions) -h            print this help and exit -i            print memcached and libevent license -P <file>     save PID in <file>, only used with -d option -f <factor>   chunk size growth factor (default: 1.25) -n <bytes>    minimum space allocated for key+value+flags (default: 48) -L            Try to use large memory pages (if available). Increasing               the memory page size could reduce the number of TLB misses               and improve the performance. In order to get large pages               from the OS, memcached will allocate the total item-cache               in one large chunk. -D <char>     Use <char> as the delimiter between key prefixes and IDs.               This is used for per-prefix stats reporting. The default is               ":" (colon). If this option is specified, stats collection               is turned on automatically; if not, then it may be turned on               by sending the "stats detail on" command to the server. -t <num>      number of threads to use (default: 4) -R            Maximum number of requests per event, limits the number of               requests process for a given connection to prevent               starvation (default: 20) -C            Disable use of CAS -b            Set the backlog queue limit (default: 1024) -B            Binding protocol - one of ascii, binary, or auto (default) -I            Override the size of each slab page. Adjusts max item size               (default: 1mb, min: 1k, max: 128m) -o            Comma separated list of extended or experimental options               - (EXPERIMENTAL) maxconns_fast: immediately close new                 connections if over maxconns limit               - hashpower: An integer multiplier for how large the hash                 table should be. Can be grown at runtime if not big enough.                 Set this based on "STAT hash_power_level" before a                 restart.               - tail_repair_time: Time in seconds that indicates how long to wait before                 forcefully taking over the LRU tail item whose refcount has leaked.                 The default is 3 hours.

memcached 启动命令参数中文解释

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-p : 监听的TCP端口 -U : udp监听端口 -s : linux socket 路径 -A : 启用 ascii"shutdown" 命令 -l : 监听的ip地址（服务器多网卡，多ip） -d : 作为一个deamon进程运行 -r : 最大的核心文件数 -u : 启用的用户 -m : 最大可以使用的内存大小,单位是M（默认是64M） -c : 最大连接数 -k : 锁定所有的内存页， -v : -vv: -vvv: 这三个命令都是输出debug信息，帮助人们了解服务器信息 -h : 打印帮助信息 -i : 打印memcached 和 libevent 版本信息 -P : 指定pid文件路径 -f : 指定chunksize的增长因子, 默认是1.25 -n : 指定key + value + flag 分配空间的最小值（默认是48字节） -L : 尝试使用大内存页 -t : 开启的服务线程数 -R : 每个事件处理中，能处理的最大请求数，限制处理每个连接的请求数来防止饥饿。（默认是20） -C : 禁用CAS -b : 设置backlog队列的大小。默认是1024 -B : 绑定协议，可选值是：ascii, binary, auto; 默认是auto; -I : 忽略每个slab page 的大小，以最大的item大小为准。默认是1M,最小1k, 最大128M -o : 以','分割的扩展或者实验选项。