[求助] memcached 这个是干什么用的 ？求解答

sysset

今天看到程序上有这功能，wdcp面板上提示未安装服务想请问下 安装了这个对网站有帮助吗 ？能提高速度吗 ？
这个memcached是干什么用的
我是菜鸟 请老鸟勿喷

heshiqi

HTTP request sent, awaiting response... 200 OK

    The file is already fully retrieved; nothing to do.

tar: libevent-1.4.14b-stable.tar.gz: Cannot open: No such file or directory
tar: Error is not recoverable: exiting now
memcached_ins.sh: line 35: cd: libevent-1.4.14b-stable: No such file or directory
memcached_ins.sh: line 36: ./configure: No such file or directory
make: *** No targets specified and no makefile found.  Stop.

heshiqi

没装好。，怎么回事