1Ideally, you want to make a static binary, otherwise the dynamic 2linker pollutes your address space with shared libs right in the 3middle. (NOTE: actually, this shouldn't matter so much anymore, now 4that we only allocate huge, fixed-size slabs) 5 6Make sure your libevent has epoll (Linux) or kqueue (BSD) support. 7Using poll or select only is slow, and works for testing, but 8shouldn't be used for high-traffic memcache installations. 9 10To build libevent with epoll on Linux, you need two things. First, 11you need /usr/include/sys/epoll.h . To get it, you can install the 12userspace epoll library, epoll-lib. The link to the latest version 13is buried inside 14http://www.xmailserver.org/linux-patches/nio-improve.html ; currently 15it's http://www.xmailserver.org/linux-patches/epoll-lib-0.9.tar.gz . 16If you're having any trouble building/installing it, you can just copy 17epoll.h from that tarball to /usr/include/sys as that's the only thing 18from there that libevent really needs. 19 20Secondly, you need to declare syscall numbers of epoll syscalls, so 21libevent can use them. Put these declarations somewhere 22inside <sys/epoll.h>: 23 24#define __NR_epoll_create 254 25#define __NR_epoll_ctl 255 26#define __NR_epoll_wait 256 27 28After this you should be able to build libevent with epoll support. 29Once you build/install libevent, you don't need <sys/epoll.h> to 30compile memcache or link it against libevent. Don't forget that for epoll 31support to actually work at runtime you need to use a kernel with epoll 32support patch applied, as explained in the README file. 33 34BSD users are luckier, and will get kqueue support by default. 35 36 37 38