linux下命令：memcached -d -m 2048 -l 192.168.10.224 -p 11211 -u root
Memcache概述： Memcache是一个高性能的分布式的内存对象缓存系统，通过在内存里维护一个统一的巨大的hash表，它能够用来存储各种格式的数据，包括图像、视频、文件以及数据库检索的结果等。简单的说就是将数据调用到内存中，然后从内存中读取，从而大大提高读取速度。
Memcached是以守护程序方式运行于一个或多个服务器中，随时会接收客户端的连接和操作。
Memcache安装： 1:下载libevent与memcache软件包。 libevent下载地址：http://monkey.org/~provos/libevent/ memcache下载地址:http://memcached.org/
chmod -R 777 /usr/local/src/memcached #时间时区同步，修改主机名 ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
ntpdate cn.pool.ntp.org hwclock --systohc echo "*/30 * * * * root ntpdate -s 3.cn.poop.ntp.org" >> /etc/crontab
sed -i 's|SELINUX=.|SELINUX=disabled|' /etc/selinux/config sed -i 's|SELINUXTYPE=.|#SELINUXTYPE=targeted|' /etc/selinux/config sed -i 's|SELINUX=.|SELINUX=disabled|' /etc/sysconfig/selinux sed -i 's|SELINUXTYPE=.|#SELINUXTYPE=targeted|' /etc/sysconfig/selinux setenforce 0 && systemctl stop firewalld && systemctl disable firewalld
rm -rf /var/run/yum.pid rm -rf /var/run/yum.pid yum -y install gcc* make cmake autoconf libtool
#安装libevent mkdir -p /usr/local/memcached/libevent cd /usr/local/src/memcached/ tar -zxvf libevent-2.0.21-stable.tar.gz -C /usr/local/memcached/libevent cd /usr/local/memcached/libevent/libevent-2.0.21-stable ./configure -prefix=/usr/local/memcached/libevent make && make install echo '/usr/local/memcached/libevent/lib' > /etc/ld.so.conf.d/libevent.conf ldconfig
#安装memcached-1.4.15 cd /usr/local/src/memcached/ tar -zxvf memcached-1.4.15.tar.gz -C /usr/local/memcached/ cd /usr/local/memcached/memcached-1.4.15/ ./configure --prefix=/usr/local/memcached/ --with-libevent=/usr/local/memcached/libevent make && make install
cat >> /usr/local/memcached.conf <<EOF PORT="11211" USER="root" MAXCONN="2048" CACHESIZE="2048" OPTIONS="" EOF
#开启memcache，并连接测试：以守护进程模式启动memcached #/usr/local/memcached/bin/memcached -d -l 192.168.8.20 -p 11211 -m 2048 -u root #服务随机启动 #echo '/usr/local/memcached/bin/memcached -d -l 192.168.8.20 -p 11211 -m 2048 -u root' >> /etc/rc.local
cat >> /usr/lib/systemd/system/memcached.service <<EOF [Unit] Description=Memcached Before=httpd.service tomcat.service After=network.target
[Service] Type=simple EnvironmentFile=/usr/local/memcached.conf ExecStart=/usr/local/memcached/bin/memcached -u $USER -p $PORT -m $CACHESIZE -c $MAXCONN $OPTIONS
[Install] WantedBy=multi-user.target EOF systemctl enable memcached.service && systemctl start memcached.service && systemctl stop memcached.service && systemctl restart memcached.service
cd rm -rf /usr/local/src/memcached ps aux |grep memcached
#查看状态 #ps -ef | grep 11211
#cat /tmp/memcached.pid
#kill cat /tmp/memcached.pid
查看memcache是否开启： 客户端连接测试（使用telnet） #telnet192.168.8.20 11211能连接上，说明memcache成功启用，可使用stats命令查看当前状态 #stats（只能telnet登录使用） STAT pid 29563 STAT uptime 228 STAT time 1377137834 STAT version 1.4.15 STAT libevent 2.1.3-alpha STAT pointer_size 64 STAT rusage_user 0.000999 STAT rusage_system 0.000999 STAT curr_connections 5 STAT total_connections 6 STAT connection_structures 6 STAT reserved_fds 20 STAT cmd_get 0 STAT cmd_set 0 STAT cmd_flush 0 STAT cmd_touch 0 STAT get_hits 0 STAT get_misses 0 STAT delete_misses 0 STAT delete_hits 0 STAT incr_misses 0 STAT incr_hits 0 STAT decr_misses 0 STAT decr_hits 0 STAT cas_misses 0 STAT cas_hits 0 STAT cas_badval 0 STAT touch_hits 0 STAT touch_misses 0 STAT auth_cmds 0 STAT auth_errors 0 STAT bytes_read 7 STAT bytes_written 0 STAT limit_maxbytes 2147483648 STAT accepting_conns 1 STAT listen_disabled_num 0 STAT threads 4 STAT conn_yields 0 STAT hash_power_level 16 STAT hash_bytes 524288 STAT hash_is_expanding 0 STAT bytes 0 STAT curr_items 0 STAT total_items 0 STAT expired_unfetched 0 STAT evicted_unfetched 0 STAT evictions 0 STAT reclaimed 0 END © 2019 GitHub, Inc. Terms Privacy Security Status Help Contact GitHub Pricing API Training Blog About