4月 122011
 

memcached 1.2.8

-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 <mask>     access mask for unix socket, in octal (default 0700)

-l <ip_addr>  interface to listen on, default is INDRR_ANY

-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 is 64 MB

-M            return error on memory exhausted (rather than removing items)

-c <num>      max simultaneous connections, default is 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)

-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

-R            Maximum number of requests per event

              limits the number of requests process for a given con nection

              to prevent starvation.  default 20

-b            Set the backlog queue limit (default 1024)

——————————————————————-

 

memcached 1.4.5

-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 <mask>     access mask for UNIX socket, in octal (default: 0700)

-l <ip_addr>  interface to listen on (default: INADDR_ANY, all addresses)

-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)

对于新的版本,增加了多线程处理机制,这样设定可能会提高memcache官方提供95%的命中率的问题。

对于memcache的使用,尽量使用内网,减少服务器连接的时间。

对于高并发的处理,memcache如果效果不太理想,可以尝试使用magent,memcache负载均衡。

 Posted by at 下午 9:19

 Leave a Reply

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code class="" title="" data-url=""> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong> <pre class="" title="" data-url=""> <span class="" title="" data-url="">

(required)

(required)

此站点使用Akismet来减少垃圾评论。了解我们如何处理您的评论数据