MySQL 优化（memcache）

MySQL调优（mamcache）架构
Web+memcache [192.168.5.14] Memcached [192.168.5.16] Mysql [192.168.5.15]搭建lamp架构[5.14]
yum install http* php* mysql* -y添加网站/etc/init.d/httpd start修改网页配置vim read.php$memcachehost = '192.168.5.16';$conn=mysql_connect("192.168.5.15","root","123456");vim write.php$memcachehost = '192.168.5.16';$conn=mysql_connect("192.168.5.15","root","123456"); 安装memcache客户端tar xf memcache-2.2.7.tgz -C /usr/src/cd memcache-2.2.7/ls(没有configure的解决方法)phpize(-bash:phpize: command not found 的解决方法：yum install php-devel)./configure --enable-memcache--with-php-config=/usr/bin/php-configmake && make install vim /etc/php.ini（查找PHP调用模块的存放目录）extension_dir = "/usr/lib/php/modulesls /usr/lib/php/modules（查看PHP可以调用哪些模块）dbase.so memcache.so phpcups.sovim /etc/php.iniextension_dir ="/usr/lib/php/modules"（该行下加入）extension=memcache.so（让PHP调用memcache模块） /etc/init.d/httpd reloadphp –m（查看PHP调用哪些模块，等价于访问<?phpphpinfo()?>这个页面）必须有memcache 和mysql模块安装MySQL
yum install mysql* -y/etc/init.d/mysqld start建数据库# mysqlmysql> create database db1;mysql> use db1;mysql> create table T1(IDint)engine=innodb;mysql> grant all on *.* to'root'@'192.168.5.14' identified by '123456';mysql> flush privileges;mysql> exit生成数据seq 1 19999999 >/tmp/big# mysqlmysql> use db1;mysql> load data infile '/tmp/big'into table T1;mysql> exit远程测试mysql -h 192.168.5.15 -u root -p123456安memcached服务端
tar xf libevent-2.0.22-stable.tar.gz -C/usr/src/cd libevent-2.0.22-stable/./configure --prefix=/usr/local/libevent && make&& make installtar xf memcached-1.4.22.tar.gz -C/usr/src/./configure--prefix=/usr/local/memcached --with-libevent=/usr/local/libevent/ 开启memcached/usr/local/memcached//bin/memcached -uroot -p 11211 -l 192.168.5.16 -P /var/run/memcached.pid -m 128m -c 2048 –d-u 运行memcache服务的用户-P 端口号-l 监听地址-p(大) 指定pid放到哪个文件中-m 从内存上划分多少容量来缓存数据-c 并发是多少-d 以后台执行

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