memcache基本操作（包括错误问题）

rgw2qe

一、出现问题
[iyunv@jago-dbtest memcached-1.4.17]# /usr/local/bin/memcached -d -m 10 -u root  -p 11211 -c 32 -P /tmp/memcached.pid
/usr/local/bin/memcached: error while loading shared libraries: libevent-1.4.so.2: cannot open shared object file: No such file or directory
二、解决办法
2.1、查找文件实际位置

[iyunv@jago-dbtest memcached-1.4.17]# find / -name libevent-1.4.so.2
/home/libevent-1.4.14b-stable/.libs/libevent-1.4.so.2
/usr/local/lib/libevent-1.4.so.2
2.2、打印debug信息

[iyunv@jago-dbtest memcached-1.4.17]# LD_DEBUG=libs /usr/local/bin/memcached -v
     24264:        find library=libevent-1.4.so.2 [0]; searching
     24264:         search cache=/etc/ld.so.cache
     24264:         search path=/lib64/tls/x86_64:/lib64/tls:/lib64/x86_64:/lib64:/usr/lib64/tls/x86_64:/usr/lib64/tls:/usr/lib64/x86_64:/usr/lib64                (system search path)
     24264:          trying file=/lib64/tls/x86_64/libevent-1.4.so.2
     24264:          trying file=/lib64/tls/libevent-1.4.so.2
     24264:          trying file=/lib64/x86_64/libevent-1.4.so.2
     24264:          trying file=/lib64/libevent-1.4.so.2
     24264:          trying file=/usr/lib64/tls/x86_64/libevent-1.4.so.2
     24264:          trying file=/usr/lib64/tls/libevent-1.4.so.2
     24264:          trying file=/usr/lib64/x86_64/libevent-1.4.so.2
     24264:          trying file=/usr/lib64/libevent-1.4.so.2
     24264:       
/usr/local/bin/memcached: error while loading shared libraries: libevent-1.4.so.2: cannot open shared object file: No such file or directory
2.3、软连接或者拷贝文件到所在目录

[iyunv@jago-dbtest memcached-1.4.17]# ln -s /usr/local/lib/libevent-1.4.so.2 /usr/lib64/libevent-1.4.so.2
三、启动
[iyunv@jago-dbtest memcached-1.4.17]# /usr/local/bin/memcached -d -m 10 -u root  -p 11211 -c 32 -P /tmp/memcached.pid
四、检验memcached是否启动
[iyunv@jago-dbtest memcached-1.4.17]# ps -ef|grep memcached | grep -v grep
root     24267     1  0 21:40 ?        00:00:00 /usr/local/bin/memcached -d -m 10 -u root -p 11211 -c 32 -P /tmp/memcached.pid
[iyunv@jago-dbtest memcached-1.4.17]#
五、杀掉memcached
[iyunv@jago-dbtest memcached-1.4.17]# kill `cat /tmp/memcached.pid`