memcached 啓動命令參數原文
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 啓動命令參數中文解釋
-p : 監聽的TCP端口 -U : udp監聽端口 -s : linux socket 路徑 -A : 啓用 ascii"shutdown" 命令 -l : 監聽的ip地址（服務器多網卡，多ip） -d : 作爲一個deamon進程運行 -r : 最大的核心文件數 -u : 啓用的用戶 -m : 最大可以使用的內存大小,單位是M（默認是64M） -c : 最大連接數 -k : 鎖定所有的內存頁， -v : -vv: -vvv: 這三個命令都是輸出debug信息，幫助人們瞭解服務器信息 -h : 打印幫助信息 -i : 打印memcached 和 libevent 版本信息 -P : 指定pid文件路徑 -f : 指定chunksize的增長因子, 默認是1.25 -n : 指定key + value + flag 分配空間的最小值（默認是48字節） -L : 嘗試使用大內存頁 -t : 開啓的服務線程數 -R : 每個事件處理中，能處理的最大請求數，限制處理每個連接的請求數來防止飢餓。（默認是20） -C : 禁用CAS -b : 設置backlog隊列的大小。默認是1024 -B : 綁定協議，可選值是：ascii, binary, auto; 默認是auto; -I : 忽略每個slab page 的大小，以最大的item大小爲準。默認是1M,最小1k, 最大128M -o : 以','分割的擴展或者實驗選項。